Area Code 423
Area code 423 is in Tennessee, USA , spanning 25 counties and serving 136 cities, including Chattanooga, Johnson City or Kingsport; it currently uses 752 prefixes, assigned from 423-200-XXXX through 423-999-XXXX.
In service date for area code 423: September 11, 1995.
Area code 423 spans two different time zones. The current local time is either or , depending on where you are calling (city list on this page includes time zones).
For exact NPA boundaries see official 423 area code map
Phone number lookup
More Tennessee area codes:
Locate any 423-NXX prefix:
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 423-200 | Morristown | 7/18/2002 |
| 423-201 | Lafollette | 7/18/2002 |
| 423-202 | Johnson City | 12/16/2003 |
| 423-203 | Chattanooga | 2/3/2022 |
| 423-205 | Etowah | 3/9/2016 |
| 423-206 | Chattanooga | 11/30/2018 |
| 423-207 | Midway | N/A |
| 423-208 | Chattanooga | 11/1/2006 |
| 423-209 | Chattanooga | N/A |
| 423-210 | Tellico Plains | N/A |
| 423-212 | Blountville | 7/18/2002 |
| 423-213 | Elizabethton | 11/7/2001 |
| 423-214 | Englewood | N/A |
| 423-215 | Oneida | 12/3/2004 |
| 423-216 | Benton | 4/28/2005 |
| 423-217 | Bristol | 7/18/2002 |
| 423-218 | Johnson City | 7/18/2002 |
| 423-219 | Charleston | 10/1/2019 |
| 423-220 | Erwin | 4/4/2001 |
| 423-221 | Chattanooga | N/A |
| 423-222 | Morristown | N/A |
| 423-223 | Oneida | 11/30/2006 |
| 423-224 | Kingsport | N/A |
| 423-225 | Benton | N/A |
| 423-226 | Church Hill | 5/28/2010 |
| 423-227 | Chattanooga | N/A |
| 423-228 | South Pittsburgh | N/A |
| 423-229 | Kingsport | N/A |
| 423-230 | Kingsport | N/A |
| 423-231 | Morristown | N/A |
| 423-232 | Johnson City | N/A |
| 423-233 | Johnson City | N/A |
| 423-234 | Baileyton | N/A |
| 423-235 | Bulls Gap | N/A |
| 423-236 | Apison | N/A |
| 423-237 | Newport | N/A |
| 423-238 | Ooltewah | N/A |
| 423-239 | Midway (Sullivan) | N/A |
| 423-240 | Chattanooga | N/A |
| 423-241 | Copper Basin | 4/11/2003 |
| 423-242 | Chattanooga | N/A |
| 423-243 | Soddy-Daisy | N/A |
| 423-244 | Cleveland | N/A |
| 423-245 | Kingsport | N/A |
| 423-246 | Kingsport | N/A |
| 423-247 | Kingsport | N/A |
| 423-248 | Newport | N/A |
| 423-249 | Fork Ridge | N/A |
| 423-250 | Cleveland | 4/27/2017 |
| 423-251 | Kingsport | 1/5/2017 |
| 423-252 | Athens | N/A |
| 423-253 | Tellico Plains | N/A |
| 423-254 | Morristown | N/A |
| 423-255 | Chattanooga | N/A |
| 423-256 | Church Hill | N/A |
| 423-257 | Limestone | N/A |
| 423-258 | Morristown | N/A |
| 423-259 | New Tazewell | 4/27/2004 |
| 423-260 | Chattanooga | 8/20/2007 |
| 423-261 | Coker Creek | N/A |
| 423-262 | Johnson City | N/A |
| 423-263 | Etowah | N/A |
| 423-264 | Vonore | 7/21/2011 |
| 423-265 | Chattanooga | N/A |
| 423-266 | Chattanooga | N/A |
| 423-267 | Chattanooga | N/A |
| 423-268 | Johnson City | 6/8/2012 |
| 423-269 | Chattanooga | 1/20/2017 |
| 423-270 | Erwin | 4/24/2013 |
| 423-271 | Sweetwater | 4/14/2011 |
| 423-272 | Rogersville | N/A |
| 423-273 | Morristown | N/A |
| 423-274 | Bristol | N/A |
| 423-275 | Chattanooga | 6/30/2022 |
| 423-276 | Kingsport | N/A |
| 423-277 | Morristown | 8/29/2001 |
| 423-278 | Greeneville | N/A |
| 423-279 | Blountville | N/A |
| 423-280 | Chattanooga | N/A |
| 423-281 | Butler | 11/1/2011 |
| 423-282 | Johnson City | N/A |
| 423-283 | Johnson City | N/A |
| 423-284 | Cleveland | N/A |
| 423-285 | Dayton | N/A |
| 423-286 | Oneida | N/A |
| 423-287 | Chattanooga | N/A |
| 423-288 | Kingsport | N/A |
| 423-289 | Morristown | 6/18/2001 |
| 423-290 | Chattanooga | N/A |
| 423-291 | Mountain City | 8/31/2001 |
| 423-292 | Fall Branch | N/A |
| 423-293 | Rogersville | 8/31/2001 |
| 423-294 | Chattanooga | 4/3/2001 |
| 423-295 | Ball Play | N/A |
| 423-296 | Chattanooga | N/A |
| 423-297 | Elizabethton | N/A |
| 423-298 | Chattanooga | N/A |
| 423-299 | Benton | 11/2/2003 |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 423-300 | Sneedville | 4/29/2003 |
| 423-301 | South Pittsburgh | 11/28/2011 |
| 423-302 | Johnson City | 11/10/2008 |
| 423-303 | Cleveland | N/A |
| 423-304 | Chattanooga | N/A |
| 423-305 | Chattanooga | 2/23/2007 |
| 423-306 | Midway (Sullivan) | N/A |
| 423-307 | Morristown | 10/24/2005 |
| 423-308 | Chattanooga | N/A |
| 423-309 | Chattanooga | N/A |
| 423-310 | Cleveland | 10/11/2002 |
| 423-312 | Morristown | N/A |
| 423-313 | Chattanooga | 5/9/2001 |
| 423-314 | Chattanooga | N/A |
| 423-315 | Chattanooga | N/A |
| 423-316 | Chattanooga | N/A |
| 423-317 | Morristown | N/A |
| 423-318 | Morristown | N/A |
| 423-319 | Huntsville | N/A |
| 423-320 | Chattanooga | N/A |
| 423-321 | Chattanooga | N/A |
| 423-322 | Chattanooga | N/A |
| 423-323 | Blountville | N/A |
| 423-324 | Petros | N/A |
| 423-325 | Blountville | N/A |
| 423-326 | Chattanooga | N/A |
| 423-327 | Bulls Gap | N/A |
| 423-328 | Johnson City | 2/19/2008 |
| 423-329 | Greeneville | 3/6/2002 |
| 423-330 | Erwin | 3/6/2002 |
| 423-331 | Cleveland | N/A |
| 423-332 | Soddy-Daisy | N/A |
| 423-333 | Athens | N/A |
| 423-334 | Decatur | N/A |
| 423-335 | Midway (Sullivan) | N/A |
| 423-336 | Charleston | N/A |
| 423-337 | Sweetwater | N/A |
| 423-338 | Benton | N/A |
| 423-339 | Cleveland | N/A |
| 423-340 | Bristol | N/A |
| 423-341 | Bristol | N/A |
| 423-342 | Elizabethton | 3/6/2002 |
| 423-343 | Kingsport | N/A |
| 423-344 | Chattanooga | N/A |
| 423-345 | Surgoinsville | N/A |
| 423-346 | Wartburg | N/A |
| 423-347 | Rogersville | N/A |
| 423-348 | Fall Branch | N/A |
| 423-349 | Sullivan Gardens | N/A |
| 423-350 | Bristol | 7/1/2022 |
| 423-351 | Sweetwater | N/A |
| 423-352 | Lafollette | N/A |
| 423-353 | Morristown | 3/16/2011 |
| 423-354 | Blountville | N/A |
| 423-355 | Chattanooga | N/A |
| 423-356 | Chattanooga | 2/28/2001 |
| 423-357 | Church Hill | N/A |
| 423-358 | Rogersville | 3/7/2002 |
| 423-359 | Greeneville | 8/13/2002 |
| 423-360 | Midway (Sullivan) | N/A |
| 423-361 | Midway (Sullivan) | N/A |
| 423-362 | Chattanooga | N/A |
| 423-363 | Huntsville | 2/22/2001 |
| 423-364 | Chattanooga | N/A |
| 423-365 | Spring City | N/A |
| 423-366 | Bristol | N/A |
| 423-367 | Kingsport | N/A |
| 423-368 | Athens | N/A |
| 423-369 | Oakdale | N/A |
| 423-370 | Athens | N/A |
| 423-371 | Sweetwater | N/A |
| 423-372 | Jellico | N/A |
| 423-373 | Bulls Gap | N/A |
| 423-374 | Lafollette | N/A |
| 423-375 | Benton | 3/18/2010 |
| 423-376 | Madisonville | N/A |
| 423-377 | Lafollette | N/A |
| 423-378 | Kingsport | N/A |
| 423-379 | Newport | N/A |
| 423-380 | Cleveland | N/A |
| 423-381 | Athens | N/A |
| 423-382 | Sneedville | N/A |
| 423-383 | Bristol | 11/14/2001 |
| 423-384 | Fall Branch | 11/14/2001 |
| 423-385 | Chattanooga | N/A |
| 423-386 | Chattanooga | N/A |
| 423-387 | Johnson City | 10/11/2022 |
| 423-388 | Erwin | 3/22/2002 |
| 423-389 | Midway (Sullivan) | 5/9/2002 |
| 423-390 | Kingsport | 8/13/2002 |
| 423-391 | Bluff City | N/A |
| 423-392 | Kingsport | N/A |
| 423-393 | Bulls Gap | N/A |
| 423-394 | Chattanooga | N/A |
| 423-395 | Athens | 11/4/2022 |
| 423-396 | College Dale | N/A |
| 423-397 | Benton | 7/6/2017 |
| 423-398 | Kingsport | 3/1/2011 |
| 423-399 | Lafollette | 12/2/2003 |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 423-400 | Chattanooga | N/A |
| 423-401 | Soddy-Daisy | N/A |
| 423-402 | Chattanooga | 6/20/2008 |
| 423-403 | South Pittsburgh | 5/1/2017 |
| 423-404 | Madisonville | N/A |
| 423-405 | Athens | 3/29/2011 |
| 423-406 | Midway (Sullivan) | 3/13/2008 |
| 423-407 | Spring City | 1/10/2020 |
| 423-408 | Kingsport | 10/29/2009 |
| 423-409 | Bulls Gap | N/A |
| 423-410 | Johnson City | N/A |
| 423-412 | Johnson City | N/A |
| 423-413 | Chattanooga | N/A |
| 423-414 | Chattanooga | 4/1/2010 |
| 423-415 | Newport | 3/11/2010 |
| 423-416 | Midway (Sullivan) | N/A |
| 423-417 | Chattanooga | 8/23/2017 |
| 423-418 | Midway (Sullivan) | N/A |
| 423-419 | Cumberland Gap | 2/21/2012 |
| 423-420 | Madisonville | N/A |
| 423-421 | Chattanooga | N/A |
| 423-422 | Mosheim | N/A |
| 423-424 | Chattanooga | N/A |
| 423-425 | Chattanooga | 12/11/2001 |
| 423-426 | Limestone | 3/5/2002 |
| 423-427 | Johnson City | 3/5/2018 |
| 423-428 | Dayton | 4/22/2002 |
| 423-429 | Kingsport | 1/21/2008 |
| 423-430 | Johnson City | 3/11/2013 |
| 423-431 | Johnson City | N/A |
| 423-432 | Chattanooga | N/A |
| 423-433 | Johnson City | N/A |
| 423-434 | Johnson City | N/A |
| 423-435 | Athens | 5/2/2002 |
| 423-436 | Madisonville | 5/2/2002 |
| 423-437 | Lafollette | 5/2/2002 |
| 423-438 | Morristown | 5/2/2002 |
| 423-439 | Johnson City | N/A |
| 423-440 | Elizabethton | 10/14/2009 |
| 423-441 | Cumberland Gap | 1/7/2003 |
| 423-442 | Madisonville | N/A |
| 423-443 | Chattanooga | 5/7/2002 |
| 423-444 | Limestone | 1/8/2010 |
| 423-445 | Surgoinsville | 6/25/2002 |
| 423-446 | Fall Branch | 7/6/2002 |
| 423-447 | Pikeville | N/A |
| 423-448 | Pikeville | 9/23/2009 |
| 423-449 | Lafollette | 6/13/2002 |
| 423-450 | Mosheim | 10/23/2008 |
| 423-451 | Soddy-Daisy | N/A |
| 423-452 | Spring City | N/A |
| 423-453 | Athens | 6/18/2002 |
| 423-454 | Decatur | 10/26/2004 |
| 423-455 | Jellico | 10/7/2002 |
| 423-456 | Lafollette | N/A |
| 423-457 | Cleveland | 11/13/2008 |
| 423-458 | Cleveland | 4/2/2012 |
| 423-459 | Chattanooga | 1/16/2018 |
| 423-460 | Mountain City | 9/2/2010 |
| 423-461 | Johnson City | N/A |
| 423-462 | Riceville | N/A |
| 423-463 | Chattanooga | 9/7/2006 |
| 423-464 | Cleveland | 2/27/2009 |
| 423-465 | Newport | 7/1/2005 |
| 423-466 | Athens | 10/25/2017 |
| 423-467 | Midway | N/A |
| 423-468 | Chattanooga | 5/6/2006 |
| 423-469 | Newport | N/A |
| 423-470 | Greeneville | 7/28/2003 |
| 423-471 | Mountain City | 7/28/2003 |
| 423-472 | Cleveland | N/A |
| 423-473 | Cleveland | N/A |
| 423-474 | Stoney Creek | N/A |
| 423-475 | Chattanooga | 11/6/2007 |
| 423-476 | Cleveland | N/A |
| 423-477 | Midway | N/A |
| 423-478 | Cleveland | N/A |
| 423-479 | Cleveland | N/A |
| 423-480 | Kingsport | 2/10/2012 |
| 423-481 | Roan Mountain | 9/1/2011 |
| 423-482 | Blountville | 6/7/2002 |
| 423-483 | Johnson City | 6/7/2002 |
| 423-484 | Bristol | 6/7/2002 |
| 423-485 | Chattanooga | N/A |
| 423-486 | Chattanooga | 6/9/2010 |
| 423-487 | Newport | N/A |
| 423-488 | Chattanooga | N/A |
| 423-489 | Cumberland Gap | 11/2/2004 |
| 423-490 | Chattanooga | N/A |
| 423-491 | Johnson City | 6/21/2013 |
| 423-492 | Morristown | 4/7/2011 |
| 423-493 | Chattanooga | N/A |
| 423-494 | Lafollette | 2/4/2003 |
| 423-495 | Chattanooga | N/A |
| 423-496 | Copper Basin | N/A |
| 423-497 | Chattanooga | 2/3/2017 |
| 423-498 | Chattanooga | 2/1/2017 |
| 423-499 | Chattanooga | N/A |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 423-500 | Rogersville | 3/28/2016 |
| 423-501 | Mountain City | 10/25/2017 |
| 423-502 | Midway (Sullivan) | N/A |
| 423-503 | Chattanooga | N/A |
| 423-504 | Chattanooga | N/A |
| 423-505 | Chattanooga | N/A |
| 423-506 | Athens | N/A |
| 423-507 | Athens | N/A |
| 423-508 | Chattanooga | N/A |
| 423-509 | Chattanooga | 10/24/2008 |
| 423-510 | Chattanooga | N/A |
| 423-512 | Stoney Creek | 8/4/2003 |
| 423-513 | Vonore | 11/8/2022 |
| 423-514 | Chattanooga | N/A |
| 423-515 | South Pittsburgh | 10/1/2019 |
| 423-516 | Sullivan Gardens | 2/21/2012 |
| 423-517 | Chattanooga | N/A |
| 423-518 | Elizabethton | 5/24/2012 |
| 423-519 | Tellico Plains | N/A |
| 423-520 | Madisonville | N/A |
| 423-521 | Chattanooga | 6/10/2008 |
| 423-522 | Morristown | 12/5/2002 |
| 423-523 | Bulls Gap | 5/9/2002 |
| 423-524 | Johnson City | 2/6/2018 |
| 423-525 | Greeneville | 5/14/2008 |
| 423-526 | New Tazewell | N/A |
| 423-527 | Soddy-Daisy | 11/9/2022 |
| 423-528 | Baileyton | N/A |
| 423-529 | Georgetown | 4/17/2006 |
| 423-530 | Kingsport | 3/15/2012 |
| 423-531 | Chattanooga | 9/16/2008 |
| 423-532 | Newport | N/A |
| 423-533 | Nine Mile | N/A |
| 423-534 | Bristol | N/A |
| 423-535 | Chattanooga | 7/9/2003 |
| 423-536 | Sweetwater | N/A |
| 423-537 | Bulls Gap | N/A |
| 423-538 | Bluff City | N/A |
| 423-539 | Oneida | N/A |
| 423-540 | Newport | 2/15/2018 |
| 423-541 | Chattanooga | 3/20/2018 |
| 423-542 | Elizabethton | N/A |
| 423-543 | Elizabethton | N/A |
| 423-544 | Chattanooga | 9/14/2001 |
| 423-545 | Madisonville | 8/20/2002 |
| 423-546 | Bulls Gap | 8/20/2002 |
| 423-547 | Elizabethton | N/A |
| 423-548 | Copper Basin | 7/11/2005 |
| 423-549 | Johnson City | 3/23/2018 |
| 423-550 | Midway | 01/25/2023 |
| 423-551 | Chattanooga | 2/27/2014 |
| 423-552 | Greeneville | N/A |
| 423-553 | Chattanooga | N/A |
| 423-554 | College Station | N/A |
| 423-556 | Soddy-Daisy | 8/30/2018 |
| 423-557 | Johnson City | 9/29/2004 |
| 423-558 | Chattanooga | N/A |
| 423-559 | Cleveland | N/A |
| 423-560 | Erwin | 8/16/2018 |
| 423-561 | Sweetwater | 4/18/2014 |
| 423-562 | Lafollette | N/A |
| 423-563 | Lafollette | N/A |
| 423-564 | Rogersville | 5/25/2018 |
| 423-565 | Decatur | 8/30/2018 |
| 423-566 | Lafollette | N/A |
| 423-567 | Dayton | 11/26/2008 |
| 423-568 | Niota | N/A |
| 423-569 | Oneida | N/A |
| 423-570 | Dayton | N/A |
| 423-571 | Midway (Sullivan) | N/A |
| 423-572 | Englewood | N/A |
| 423-573 | Bristol | 7/7/2006 |
| 423-574 | Blountville | 7/7/2006 |
| 423-575 | Bluff City | 7/7/2006 |
| 423-576 | Elizabethton | 06/15/2023 |
| 423-577 | Oneida | N/A |
| 423-578 | Kingsport | N/A |
| 423-579 | Kingsport | 2/13/2009 |
| 423-580 | Chattanooga | N/A |
| 423-581 | Morristown | N/A |
| 423-582 | Chattanooga | 8/10/2009 |
| 423-583 | Sullivan Gardens | 9/26/2018 |
| 423-584 | Cleveland | N/A |
| 423-585 | Morristown | N/A |
| 423-586 | Morristown | N/A |
| 423-587 | Morristown | N/A |
| 423-588 | Greeneville | 1/7/2010 |
| 423-589 | Georgetown | 4/9/2019 |
| 423-590 | South Pittsburgh | 5/3/2019 |
| 423-591 | Chattanooga | 1/3/2008 |
| 423-592 | Lafollette | N/A |
| 423-593 | Chattanooga | N/A |
| 423-594 | Dayton | 9/16/2009 |
| 423-595 | Chattanooga | 4/12/2001 |
| 423-596 | Chattanooga | N/A |
| 423-597 | Benton | 5/22/2019 |
| 423-598 | Chattanooga | N/A |
| 423-599 | Cleveland | 1/7/2010 |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 423-600 | Apison | 3/19/2007 |
| 423-601 | Bulls Gap | 2/3/2005 |
| 423-602 | Chattanooga | 6/8/2012 |
| 423-603 | Fork Ridge | 12/13/2013 |
| 423-604 | Etowah | N/A |
| 423-605 | Chattanooga | N/A |
| 423-606 | Englewood | 2/26/2007 |
| 423-607 | Limestone | 2/17/2014 |
| 423-608 | Newport | N/A |
| 423-609 | Greeneville | 8/12/2014 |
| 423-610 | Johnson City | N/A |
| 423-612 | Bristol | N/A |
| 423-613 | Newport | N/A |
| 423-614 | Cleveland | N/A |
| 423-615 | College Dale | 3/19/2007 |
| 423-616 | Morristown | 8/18/2014 |
| 423-617 | Athens | 10/7/2013 |
| 423-618 | Chattanooga | N/A |
| 423-619 | Chattanooga | N/A |
| 423-620 | Greeneville | N/A |
| 423-621 | Morristown | N/A |
| 423-622 | Chattanooga | N/A |
| 423-623 | Newport | N/A |
| 423-624 | Chattanooga | N/A |
| 423-625 | Newport | N/A |
| 423-626 | New Tazewell | N/A |
| 423-627 | Robbins | N/A |
| 423-628 | Sunbright | N/A |
| 423-629 | Chattanooga | N/A |
| 423-630 | Johnson City | 9/25/2007 |
| 423-631 | Johnson City | 4/8/2008 |
| 423-632 | Wartburg | 6/24/2019 |
| 423-633 | Chattanooga | 12/17/2019 |
| 423-634 | Chattanooga | N/A |
| 423-635 | Chattanooga | N/A |
| 423-636 | Greeneville | N/A |
| 423-637 | Chattanooga | 6/9/2008 |
| 423-638 | Greeneville | N/A |
| 423-639 | Greeneville | N/A |
| 423-640 | Sneedville | 3/27/2020 |
| 423-641 | Cleveland | 4/7/2014 |
| 423-642 | Chattanooga | N/A |
| 423-643 | Chattanooga | 8/14/2002 |
| 423-644 | Soddy-Daisy | 3/9/2020 |
| 423-645 | Chattanooga | N/A |
| 423-646 | Bristol | N/A |
| 423-647 | Butler | N/A |
| 423-648 | Chattanooga | N/A |
| 423-649 | Athens | N/A |
| 423-650 | Cleveland | N/A |
| 423-651 | Jasper | 5/8/2014 |
| 423-652 | Bristol | N/A |
| 423-653 | Chattanooga | N/A |
| 423-654 | Chattanooga | 7/21/2020 |
| 423-655 | Chattanooga | N/A |
| 423-656 | Johnson City | 7/22/2020 |
| 423-657 | Mosheim | 1/28/2015 |
| 423-658 | Whitwell | N/A |
| 423-659 | Copper Basin | 8/4/2020 |
| 423-660 | Chattanooga | 9/16/2020 |
| 423-661 | Chattanooga | 8/12/2014 |
| 423-662 | Blountville | N/A |
| 423-663 | Huntsville | N/A |
| 423-664 | Chattanooga | N/A |
| 423-665 | Charleston | 10/26/2004 |
| 423-666 | Elizabethton | 5/17/2018 |
| 423-667 | Chattanooga | N/A |
| 423-668 | Chattanooga | N/A |
| 423-669 | Benton | 08/11/2023 |
| 423-670 | Johnson City | 9/23/2020 |
| 423-671 | Chattanooga | 9/29/2020 |
| 423-672 | Johnson City | 12/27/2019 |
| 423-673 | Johnson City | 4/13/2021 |
| 423-674 | Dayton | 4/13/2021 |
| 423-675 | Jasper | 4/13/2021 |
| 423-676 | Johnson City | N/A |
| 423-677 | Fall Branch | N/A |
| 423-678 | Roan Mountain | 4/15/2021 |
| 423-679 | Ooltewah | 4/13/2021 |
| 423-680 | Chattanooga | 3/30/2016 |
| 423-681 | Chattanooga | 1/14/2015 |
| 423-682 | Chattanooga | 1/14/2016 |
| 423-683 | Elizabethton | N/A |
| 423-684 | Greeneville | N/A |
| 423-685 | Johnson City | N/A |
| 423-686 | Fork Ridge | 4/15/2021 |
| 423-687 | Pikeville | 5/13/2021 |
| 423-688 | Sneedville | 5/17/2021 |
| 423-689 | Bristol | 7/1/2021 |
| 423-690 | Morristown | 12/2/2016 |
| 423-691 | Athens | 9/1/2021 |
| 423-692 | Butler | 9/1/2021 |
| 423-693 | Chattanooga | 5/19/2006 |
| 423-694 | Sweetwater | 9/8/2021 |
| 423-695 | Erwin | N/A |
| 423-696 | Rogersville | 9/16/2021 |
| 423-697 | Chattanooga | N/A |
| 423-698 | Chattanooga | N/A |
| 423-699 | Mountain City | N/A |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 423-701 | Robbins | 1/30/2014 |
| 423-702 | Chattanooga | 2/14/2006 |
| 423-703 | Coker Creek | 11/21/2019 |
| 423-704 | Chattanooga | N/A |
| 423-705 | Johnson City | 12/2/2021 |
| 423-707 | Elizabethton | 12/11/2009 |
| 423-708 | Chattanooga | 10/8/2014 |
| 423-709 | Cleveland | N/A |
| 423-710 | Chattanooga | 6/19/2007 |
| 423-712 | Bluff City | 1/26/2015 |
| 423-713 | Chattanooga | 6/5/2015 |
| 423-714 | Morristown | N/A |
| 423-715 | Cleveland | N/A |
| 423-716 | Cleveland | N/A |
| 423-717 | Athens | 4/29/2015 |
| 423-718 | Chattanooga | N/A |
| 423-719 | Chattanooga | 12/2/2021 |
| 423-720 | Newport | 5/20/2015 |
| 423-721 | Newport | N/A |
| 423-722 | Johnson City | N/A |
| 423-723 | Kingsport | N/A |
| 423-724 | Sneedville | N/A |
| 423-725 | Hampton | N/A |
| 423-726 | Midway (Sullivan) | N/A |
| 423-727 | Mountain City | N/A |
| 423-728 | Cleveland | N/A |
| 423-729 | Fall Creek Falls | 06/25/2024 |
| 423-730 | Riceville | 2/26/2007 |
| 423-732 | Kingsport | 8/11/2015 |
| 423-733 | Sneedville | N/A |
| 423-734 | Rogersville | 1/9/2020 |
| 423-735 | Erwin | N/A |
| 423-736 | Morristown | N/A |
| 423-737 | Johnson City | N/A |
| 423-738 | Bristol | 12/14/2021 |
| 423-739 | Shady Valley | N/A |
| 423-740 | Cleveland | 12/15/2021 |
| 423-741 | Johnson City | N/A |
| 423-742 | Bristol | N/A |
| 423-743 | Erwin | N/A |
| 423-744 | Athens | N/A |
| 423-745 | Athens | N/A |
| 423-746 | Athens | N/A |
| 423-747 | Johnson City | N/A |
| 423-748 | Morristown | N/A |
| 423-749 | College Dale | 12/29/2021 |
| 423-750 | Chattanooga | 9/3/2021 |
| 423-751 | Chattanooga | N/A |
| 423-752 | Chattanooga | N/A |
| 423-753 | Jonesboro | N/A |
| 423-754 | Rogersville | N/A |
| 423-755 | Chattanooga | N/A |
| 423-756 | Chattanooga | N/A |
| 423-757 | Chattanooga | N/A |
| 423-758 | Bristol | N/A |
| 423-759 | Morristown | 9/1/2021 |
| 423-760 | Chattanooga | N/A |
| 423-761 | Copper Basin | 8/1/2006 |
| 423-762 | Chattanooga | N/A |
| 423-763 | Chattanooga | N/A |
| 423-764 | Bristol | N/A |
| 423-765 | Kingsport | 12/2/2004 |
| 423-766 | Limestone | 1/20/2021 |
| 423-767 | Johnson City | 1/9/2001 |
| 423-768 | Butler | N/A |
| 423-769 | Benton | 12/15/2021 |
| 423-770 | Church Hill | 8/16/2018 |
| 423-771 | Chattanooga | 1/6/2010 |
| 423-772 | Roan Mountain | N/A |
| 423-773 | Johnson City | 2/9/2001 |
| 423-774 | Soddy-Daisy | N/A |
| 423-775 | Dayton | N/A |
| 423-776 | Pikeville | 12/30/2021 |
| 423-777 | Chattanooga | 10/6/2014 |
| 423-778 | Chattanooga | N/A |
| 423-779 | Chattanooga | N/A |
| 423-780 | Charleston | N/A |
| 423-781 | Etowah | 3/1/2004 |
| 423-782 | Kingsport | N/A |
| 423-783 | Greeneville | N/A |
| 423-784 | Jellico | N/A |
| 423-785 | Chattanooga | N/A |
| 423-786 | Bluff City | 08/11/2023 |
| 423-787 | Greeneville | N/A |
| 423-788 | Jonesboro | N/A |
| 423-789 | Bristol | 8/13/2002 |
| 423-790 | Cleveland | 4/12/2006 |
| 423-791 | Johnson City | N/A |
| 423-792 | Oakdale | 02/21/2024 |
| 423-793 | Bristol | N/A |
| 423-794 | Johnson City | N/A |
| 423-795 | Johnson City | N/A |
| 423-796 | Johnson City | 2/1/2022 |
| 423-797 | Bristol | N/A |
| 423-798 | Greeneville | N/A |
| 423-799 | Spring City | 10/26/2004 |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 423-800 | Chattanooga | 2/10/2011 |
| 423-801 | Cumberland Gap | 12/19/2007 |
| 423-802 | Chattanooga | N/A |
| 423-803 | Chattanooga | 1/4/2016 |
| 423-804 | Bristol | 2/3/2022 |
| 423-805 | Chattanooga | 6/14/2013 |
| 423-806 | Midway | 5/20/2015 |
| 423-807 | Madisonville | N/A |
| 423-808 | Tellico Plains | 9/14/2007 |
| 423-809 | Pikeville | 05/18/2023 |
| 423-810 | Charleston | 8/3/2015 |
| 423-812 | Greeneville | 8/23/2016 |
| 423-813 | Cleveland | 10/8/2015 |
| 423-814 | Sweetwater | N/A |
| 423-815 | Whitwell | 9/14/2007 |
| 423-816 | Bristol | 12/1/2022 |
| 423-817 | Kingsport | N/A |
| 423-818 | Jellico | 9/21/2016 |
| 423-819 | Cleveland | 12/30/2022 |
| 423-820 | Greeneville | 5/17/2018 |
| 423-821 | Chattanooga | N/A |
| 423-822 | Chattanooga | N/A |
| 423-823 | Greeneville | N/A |
| 423-824 | Erwin | 08/11/2023 |
| 423-825 | Chattanooga | N/A |
| 423-826 | Chattanooga | N/A |
| 423-827 | Chattanooga | N/A |
| 423-829 | Charleston | N/A |
| 423-830 | Kingsport | 5/17/2018 |
| 423-831 | Greeneville | 03/02/2023 |
| 423-832 | Clinchport | 1/13/2022 |
| 423-833 | Johnson City | N/A |
| 423-834 | Chattanooga | N/A |
| 423-835 | Bristol | 03/16/2023 |
| 423-836 | Sweetwater | N/A |
| 423-837 | South Pittsburgh | N/A |
| 423-838 | Chattanooga | N/A |
| 423-839 | Morristown | N/A |
| 423-840 | Butler | 5/17/2018 |
| 423-841 | Mountain City | 04/06/2023 |
| 423-842 | Chattanooga | N/A |
| 423-843 | Chattanooga | N/A |
| 423-844 | Bristol | N/A |
| 423-845 | Bristol | 3/30/2005 |
| 423-846 | Chattanooga | N/A |
| 423-847 | Chattanooga | N/A |
| 423-848 | Johnson City | 9/3/2021 |
| 423-849 | Johnson City | 05/05/2023 |
| 423-850 | Jonesboro | 5/21/2018 |
| 423-851 | New Tazewell | N/A |
| 423-852 | Dunlap | 05/18/2023 |
| 423-853 | Johnson City | 1/21/2022 |
| 423-854 | Johnson City | N/A |
| 423-855 | Chattanooga | N/A |
| 423-856 | Athens | 9/16/2016 |
| 423-857 | Kingsport | N/A |
| 423-858 | Blountville | 08/11/2023 |
| 423-859 | Rogersville | 05/31/2023 |
| 423-860 | Chattanooga | 7/1/2022 |
| 423-862 | Spring City | 08/22/2023 |
| 423-863 | Kingsport | N/A |
| 423-864 | Decatur | 05/18/2023 |
| 423-866 | Niota | 08/07/2023 |
| 423-867 | Chattanooga | N/A |
| 423-868 | Mosheim | 08/22/2023 |
| 423-869 | Cumberland Gap | N/A |
| 423-870 | Chattanooga | N/A |
| 423-871 | Lafollette | N/A |
| 423-872 | Chattanooga | 05/23/2023 |
| 423-873 | Stoney Creek | 7/15/2020 |
| 423-874 | Chattanooga | N/A |
| 423-875 | Chattanooga | N/A |
| 423-876 | Chattanooga | N/A |
| 423-877 | Chattanooga | N/A |
| 423-878 | Bristol | N/A |
| 423-879 | Georgetown | 08/22/2023 |
| 423-880 | Johnson City | 3/31/2021 |
| 423-881 | Fall Creek Falls | N/A |
| 423-882 | Chattanooga | 10/26/2011 |
| 423-883 | Chattanooga | N/A |
| 423-884 | Vonore | N/A |
| 423-885 | Englewood | N/A |
| 423-886 | Chattanooga | N/A |
| 423-887 | Englewood | N/A |
| 423-888 | Chattanooga | 8/17/2015 |
| 423-889 | Cleveland | 08/30/2023 |
| 423-890 | Bristol | 09/06/2023 |
| 423-892 | Chattanooga | N/A |
| 423-893 | Chattanooga | N/A |
| 423-894 | Chattanooga | N/A |
| 423-895 | Elizabethton | N/A |
| 423-896 | Hampton | N/A |
| 423-897 | Fall Branch | N/A |
| 423-898 | Charleston | 10/12/2023 |
| 423-899 | Chattanooga | N/A |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 423-900 | Johnson City | 2/16/2011 |
| 423-902 | Chattanooga | N/A |
| 423-903 | Chattanooga | N/A |
| 423-904 | Chattanooga | 4/13/2021 |
| 423-905 | Johnson City | 4/13/2021 |
| 423-906 | Johnson City | 10/24/2023 |
| 423-907 | Lafollette | N/A |
| 423-908 | Surgoinsville | 01/09/2024 |
| 423-909 | South Pittsburgh | 05/18/2023 |
| 423-910 | Ooltewah | 3/19/2007 |
| 423-912 | Lafollette | N/A |
| 423-913 | Jonesboro | N/A |
| 423-914 | Bristol | N/A |
| 423-915 | Johnson City | N/A |
| 423-916 | Johnson City | 11/22/2024 |
| 423-917 | Blountville | N/A |
| 423-918 | Oneida | 12/12/2024 |
| 423-919 | New Tazewell | 10/1/2019 |
| 423-920 | Athens | N/A |
| 423-921 | Rogersville | N/A |
| 423-922 | Baileyton | 7/15/2020 |
| 423-923 | Rogersville | N/A |
| 423-925 | Lafollette | 3/23/2022 |
| 423-926 | Johnson City | N/A |
| 423-927 | Morristown | 3/1/2022 |
| 423-928 | Johnson City | N/A |
| 423-929 | Johnson City | N/A |
| 423-930 | Johnson City | 2/13/2009 |
| 423-932 | Etowah | 1/20/2022 |
| 423-933 | Chattanooga | 6/14/2002 |
| 423-934 | Surgoinsville | 3/18/2021 |
| 423-936 | Sunbright | 05/14/2024 |
| 423-938 | Johnson City | 8/13/2002 |
| 423-939 | Jasper | 6/21/2005 |
| 423-940 | Dayton | 03/20/2023 |
| 423-941 | Deer Lodge | 05/14/2024 |
| 423-942 | Jasper | N/A |
| 423-943 | Johnson City | N/A |
| 423-944 | Clinchport | N/A |
| 423-946 | Johnson City | 3/9/2001 |
| 423-948 | Limestone | N/A |
| 423-949 | Dunlap | N/A |
| 423-951 | Charleston | 06/06/2024 |
| 423-952 | Johnson City | N/A |
| 423-953 | Johnson City | N/A |
| 423-954 | Chattanooga | N/A |
| 423-955 | Whitwell | 7/15/2020 |
| 423-956 | Bristol | N/A |
| 423-957 | Hampton | N/A |
| 423-960 | Chattanooga | 02/24/2025 |
| 423-961 | Georgetown | N/A |
| 423-963 | Kingsport | 3/9/2001 |
| 423-965 | Deer Lodge | N/A |
| 423-966 | Ball Play | 7/15/2020 |
| 423-967 | Kingsport | N/A |
| 423-968 | Bristol | N/A |
| 423-972 | Greeneville | N/A |
| 423-973 | Sneedville | 4/30/2002 |
| 423-975 | Johnson City | N/A |
| 423-977 | Chattanooga | 7/18/2019 |
| 423-979 | Johnson City | N/A |
| 423-980 | Chattanooga | 3/31/2021 |
| 423-987 | Chattanooga | N/A |
| 423-989 | Bristol | N/A |
| 423-990 | Bristol | N/A |
| 423-991 | Chattanooga | N/A |
| 423-994 | Chattanooga | 5/10/2007 |
| 423-998 | Jellico | 10/10/2022 |
| 423-999 | Athens | 3/30/2011 |
- For 'Area served' we list the rate center. In the North American Numbering Plan a rate center is a geographic area used to determine local calling boundaries for billing purposes. Its name is generally a locality, often not the only one served by an NPA-NXX combination.
- Assignment date. N/A - mostly central office codes assigned before 2001.
- NXX prefixes last updated: March 1st, 2025
Cities in area code 423
| City1 | County | Time Zone2 |
|---|---|---|
| Afton | Greene | E |
| Apison | Hamilton | E |
| Arthur | Claiborne | E |
| Athens | McMinn | E |
| Bakewell | Hamilton | E |
| Benton | Polk | E |
| Birchwood | Hamilton | E |
| Blountville | Sullivan | E |
| Bluff City | Sullivan | E |
| Bristol | Sullivan | E |
| Bulls Gap | Hawkins | E |
| Butler | Johnson | E |
| Bybee | Cocke | E |
| Calhoun | McMinn | E |
| Caryville | Campbell | E |
| Charleston | Bradley | E |
| Chattanooga | Hamilton | E |
| Chuckey | Greene | E |
| Church Hill | Hawkins | E |
| Clairfield | Claiborne | E |
| Cleveland | Bradley | E |
| Coalfield | Morgan | E |
| Coker Creek | Monroe | E |
| Collegedale | Hamilton | E |
| Conasauga | Polk | E |
| Copperhill | Polk | E |
| Cosby | Cocke | E |
| Cumberland Gap | Claiborne | E |
| Dayton | Rhea | E |
| Decatur | Meigs | E |
| Deer Lodge | Morgan | E |
| Del Rio | Cocke | E |
| Delano | Polk | E |
| Ducktown | Polk | E |
| Duff | Campbell | E |
| Dunlap | Sequatchie | C |
| Eagan | Claiborne | E |
| Eidson | Hawkins | E |
| Elgin | Scott | E |
| Elizabethton | Carter | E |
| Englewood | McMinn | E |
| Erwin | Unicoi | E |
| Etowah | McMinn | E |
| Evensville | Rhea | E |
| Fall Branch | Washington | E |
| Farner | Polk | E |
| Flag Pond | Unicoi | E |
| Georgetown | Meigs | E |
| Grandview | Rhea | E |
| Graysville | Rhea | E |
| Greeneville | Greene | E |
| Guild | Marion | C |
| Hampton | Carter | E |
| Harrison | Hamilton | E |
| Harrogate | Claiborne | E |
| Hartford | Cocke | E |
| Helenwood | Scott | E |
| Hixson | Hamilton | E |
| Huntsville | Scott | E |
| Jacksboro | Campbell | E |
| Jasper | Marion | C |
| Jellico | Campbell | E |
| Johnson City | Washington | E |
| Jonesborough | Washington | E |
| Kingsport | Sullivan | E |
| Kyles Ford | Hancock | E |
| LaFollette | Campbell | E |
| Lancing | Morgan | E |
| Laurel Bloomery | Johnson | E |
| Limestone | Washington | E |
| Lone Mountain | Claiborne | E |
| Lookout Mountain | Hamilton | E |
| Lowland | Hamblen | E |
| Lupton City | Hamilton | E |
| Madisonville | Monroe | E |
| Mc Donald | Bradley | E |
| Midway | Greene | E |
| Milligan College | Carter | E |
| Mohawk | Greene | E |
| Mooresburg | Hawkins | E |
| Morristown | Hamblen | E |
| Mosheim | Greene | E |
| Mount Carmel | Hawkins | E |
| Mountain City | Johnson | E |
| Mountain Home | Washington | E |
| New Tazewell | Claiborne | E |
| Newcomb | Campbell | E |
| Newport | Cocke | E |
| Niota | McMinn | E |
| Oakdale | Morgan | E |
| Ocoee | Polk | E |
| Old Fort | Polk | E |
| Oliver Springs | Roane | E |
| Oneida | Scott | E |
| Ooltewah | Hamilton | E |
| Parrottsville | Cocke | E |
| Petros | Morgan | E |
| Pikeville | Bledsoe | C |
| Piney Flats | Sullivan | E |
| Pioneer | Campbell | E |
| Pruden | Claiborne | E |
| Reliance | Polk | E |
| Riceville | McMinn | E |
| Roan Mountain | Carter | E |
| Robbins | Scott | E |
| Rogersville | Hawkins | E |
| Rugby | Morgan | E |
| Russellville | Hamblen | E |
| Sale Creek | Hamilton | E |
| Sequatchie | Marion | C |
| Shady Valley | Johnson | E |
| Shawanee | Claiborne | E |
| Signal Mountain | Hamilton | E |
| Sneedville | Hancock | E |
| Soddy-Daisy | Hamilton | E |
| South Pittsburg | Marion | C |
| Speedwell | Claiborne | E |
| Spring City | Rhea | E |
| Sunbright | Morgan | E |
| Surgoinsville | Hawkins | E |
| Sweetwater | Monroe | E |
| Talbott | Hamblen | E |
| Tazewell | Claiborne | E |
| Telford | Washington | E |
| Tellico Plains | Monroe | E |
| Ten Mile | Meigs | E |
| Trade | Johnson | E |
| Turtletown | Polk | E |
| Unicoi | Unicoi | E |
| Vonore | Monroe | E |
| Wartburg | Morgan | E |
| Watauga | Carter | E |
| Whitesburg | Hamblen | E |
| Whiteside | Marion | C |
| Whitwell | Marion | C |
| Winfield | Scott | E |
- Listed above are most places served by USA area code 423. When multiple places in a US state share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
- Multiple time zones. Go to top for current time.