Area Code 307
Area code 307 is in Wyoming, USA , spanning 23 counties and serving 175 cities, including Cheyenne, Casper or Laramie; it currently uses 484 prefixes, assigned from 307-200-XXXX through 307-999-XXXX.
In service date for area code 307: January 01, 1947.
The current local time is .
For exact NPA boundaries see official 307 area code map
Reverse phone lookup
Locate any 307-NXX prefix:
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 307-200 | Jackson | 8/16/2002 |
| 307-201 | Jackson | 1/7/2003 |
| 307-202 | Powell | 1/21/2003 |
| 307-203 | Jackson | 3/14/2001 |
| 307-204 | Cody | 2/6/2018 |
| 307-205 | Lingle | 11/16/2016 |
| 307-206 | Lander | 12/5/2013 |
| 307-207 | Lake | 12/6/2018 |
| 307-209 | Rock Springs | 12/19/2014 |
| 307-210 | Southeast Sheridan | 4/3/2020 |
| 307-212 | Rock Springs | 7/16/2002 |
| 307-213 | Cody | 7/16/2002 |
| 307-214 | Cheyenne | 1/6/2003 |
| 307-215 | Casper | 7/26/2001 |
| 307-216 | Lusk | 10/9/2002 |
| 307-217 | Buffalo | 10/9/2002 |
| 307-218 | Sheridan | 8/13/2019 |
| 307-219 | Powell | 3/26/2015 |
| 307-220 | Cheyenne | N/A |
| 307-221 | Cheyenne | N/A |
| 307-222 | Cheyenne | N/A |
| 307-223 | Laramie | N/A |
| 307-224 | Casper | N/A |
| 307-225 | Laramie | 9/2/2020 |
| 307-226 | Afton | 12/28/2015 |
| 307-227 | Mammoth | 9/19/2016 |
| 307-228 | Gillette | 5/23/2014 |
| 307-229 | Cokeville | 2/17/2015 |
| 307-230 | Border | 7/19/2022 |
| 307-231 | Pinedale | N/A |
| 307-232 | Casper | N/A |
| 307-233 | Casper | N/A |
| 307-234 | Casper | N/A |
| 307-235 | Casper | N/A |
| 307-236 | Burns | 4/3/2020 |
| 307-237 | Casper | N/A |
| 307-238 | Hamilton Dome | 8/22/2017 |
| 307-239 | Dubois | 11/5/2015 |
| 307-240 | Riverton | N/A |
| 307-241 | Wheatland | N/A |
| 307-242 | Lake | N/A |
| 307-243 | Casper | N/A |
| 307-244 | Freedom | 5/15/2019 |
| 307-245 | Pinebluffs | N/A |
| 307-246 | Albin | N/A |
| 307-247 | Casper | N/A |
| 307-248 | Afton | 3/25/2003 |
| 307-249 | Jackson | 3/24/2017 |
| 307-250 | Cody | N/A |
| 307-251 | Casper | 4/13/2006 |
| 307-252 | Rock Springs | N/A |
| 307-253 | Casper | 3/10/2008 |
| 307-254 | Powell | 9/11/2003 |
| 307-255 | Evanston | 7/15/2002 |
| 307-256 | Cheyenne | 1/5/2004 |
| 307-257 | Gillette | 5/19/2004 |
| 307-258 | Casper | N/A |
| 307-259 | Casper | N/A |
| 307-260 | Big Piney | N/A |
| 307-261 | Casper | N/A |
| 307-262 | Casper | N/A |
| 307-263 | Cheyenne | 10/16/2019 |
| 307-264 | Jackson | 3/24/2014 |
| 307-265 | Casper | N/A |
| 307-266 | Casper | N/A |
| 307-267 | Casper | N/A |
| 307-268 | Casper | N/A |
| 307-269 | Wheatland | N/A |
| 307-270 | Cokeville | N/A |
| 307-271 | Powell | 5/26/2004 |
| 307-272 | Cody | N/A |
| 307-273 | Farson | N/A |
| 307-274 | Cheyenne | 7/14/2004 |
| 307-275 | Cheyenne | 1/12/2005 |
| 307-276 | Big Piney | N/A |
| 307-277 | Casper | 8/21/2003 |
| 307-278 | Buffalo | 5/19/2004 |
| 307-279 | Cokeville | N/A |
| 307-280 | Farson | N/A |
| 307-281 | Sundance | N/A |
| 307-282 | Sundance | N/A |
| 307-283 | Sundance | N/A |
| 307-284 | Jackson | 11/20/2019 |
| 307-285 | Buffalo | 5/21/2020 |
| 307-286 | Cheyenne | 1/19/2004 |
| 307-287 | Cheyenne | 5/23/2006 |
| 307-288 | Evanston | 5/19/2004 |
| 307-289 | Cheyenne | 04/14/2023 |
| 307-290 | Sundance | N/A |
| 307-291 | Cody | 10/28/2021 |
| 307-292 | Cheyenne | 6/17/2020 |
| 307-293 | Guernsey | 3/2/2021 |
| 307-294 | Big Piney | 08/01/2023 |
| 307-295 | Torrington | 09/13/2023 |
| 307-296 | Cody | N/A |
| 307-297 | Green River | N/A |
| 307-298 | Douglas | 5/19/2004 |
| 307-299 | Gillette | 10/21/2003 |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 307-300 | Powell | 10/10/2019 |
| 307-301 | Casper | 10/09/2023 |
| 307-302 | Cody | 8/17/2020 |
| 307-303 | Green River | 11/9/2020 |
| 307-304 | Jeffrey City | 9/17/2020 |
| 307-305 | Midwest | 3/5/2021 |
| 307-306 | Douglas | 12/21/2020 |
| 307-309 | Glenrock | 9/8/2006 |
| 307-310 | Cheyenne | 10/23/2019 |
| 307-312 | West Spearfish | 6/19/2012 |
| 307-313 | Evanston | N/A |
| 307-314 | Laramie | N/A |
| 307-315 | Casper | 5/11/2007 |
| 307-316 | Cheyenne | 3/20/2006 |
| 307-317 | Cheyenne | 5/22/2017 |
| 307-318 | Wright | 1/15/2021 |
| 307-319 | Shoshoni | 9/17/2020 |
| 307-320 | Rawlins | N/A |
| 307-321 | Rawlins | N/A |
| 307-322 | Wheatland | N/A |
| 307-323 | Pinedale | 7/22/2019 |
| 307-324 | Rawlins | N/A |
| 307-325 | Hanna | N/A |
| 307-326 | Saratoga | N/A |
| 307-327 | Encampment | N/A |
| 307-328 | Rawlins | N/A |
| 307-329 | Saratoga | N/A |
| 307-330 | Lander | N/A |
| 307-331 | Wheatland | N/A |
| 307-332 | Lander | N/A |
| 307-333 | Casper | N/A |
| 307-334 | Lusk | N/A |
| 307-335 | Lander | N/A |
| 307-336 | Daniel | 7/22/2019 |
| 307-337 | Casper | 1/7/2011 |
| 307-338 | Torrington | 1/12/2011 |
| 307-339 | Hanna | N/A |
| 307-340 | Lusk | N/A |
| 307-341 | South Wyola | N/A |
| 307-342 | Jackson | N/A |
| 307-343 | Laramie | 7/16/2009 |
| 307-344 | Mammoth | N/A |
| 307-345 | Lander | N/A |
| 307-346 | Cheyenne | 7/14/2021 |
| 307-347 | Worland | N/A |
| 307-348 | Hanna | N/A |
| 307-349 | Lander | N/A |
| 307-350 | Rock Springs | N/A |
| 307-351 | Douglas | N/A |
| 307-352 | Rock Springs | N/A |
| 307-353 | Alta | N/A |
| 307-354 | Rock Springs | 3/27/2001 |
| 307-355 | La Grange | 7/29/2020 |
| 307-356 | Shirley Basin | N/A |
| 307-357 | Laramie | 10/01/2023 |
| 307-358 | Douglas | N/A |
| 307-359 | Douglas | N/A |
| 307-360 | Pinedale | N/A |
| 307-361 | Baggs | 3/5/2021 |
| 307-362 | Rock Springs | N/A |
| 307-363 | Gillette | 8/30/2010 |
| 307-364 | Green River | 5/23/2014 |
| 307-365 | Cheyenne | 3/3/2008 |
| 307-366 | Ten Sleep | N/A |
| 307-367 | Pinedale | N/A |
| 307-368 | Afton | 2/10/2021 |
| 307-369 | Cheyenne | 1/10/2011 |
| 307-370 | Rawlins | N/A |
| 307-371 | Rock Springs | N/A |
| 307-372 | Douglas | 8/10/2020 |
| 307-373 | Greybull | N/A |
| 307-374 | Rock Springs | 9/9/2021 |
| 307-375 | Worland | N/A |
| 307-376 | Alpine | 8/11/2021 |
| 307-377 | Casper | N/A |
| 307-378 | Rock River | N/A |
| 307-379 | Medicine Bow | N/A |
| 307-380 | Baggs | N/A |
| 307-381 | Sheridan | 4/23/2021 |
| 307-382 | Rock Springs | N/A |
| 307-383 | Baggs | N/A |
| 307-384 | Afton | 11/3/2021 |
| 307-386 | Labarge | N/A |
| 307-387 | Gillette | 10/1/2021 |
| 307-388 | Worland | N/A |
| 307-389 | Rock Springs | N/A |
| 307-390 | Labarge | N/A |
| 307-391 | Moorcroft | 3/14/2005 |
| 307-392 | Border | 6/21/2006 |
| 307-393 | Evanston | 3/31/2021 |
| 307-394 | Casper | 5/21/2021 |
| 307-395 | Laramie | 8/11/2021 |
| 307-396 | Green River | 10/20/2021 |
| 307-397 | Hanna | 11/5/2021 |
| 307-398 | Labarge | 11/5/2021 |
| 307-399 | Laramie | 5/16/2002 |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 307-400 | Cheyenne | 1/24/2020 |
| 307-401 | Torrington | N/A |
| 307-402 | Mt View | 11/5/2021 |
| 307-403 | Moran | 2/22/2022 |
| 307-404 | Medicine Bow | 5/23/2018 |
| 307-405 | West Bell Fourche | 05/24/2023 |
| 307-407 | West Spearfish | 8/10/2020 |
| 307-408 | Lyman | 11/5/2021 |
| 307-409 | La Grange | 2/20/2018 |
| 307-410 | Powell | 3/22/2022 |
| 307-412 | Laramie | 9/23/2022 |
| 307-413 | Jackson | 1/29/2001 |
| 307-414 | Cheyenne | 8/24/2015 |
| 307-415 | Cheyenne | 03/03/2023 |
| 307-416 | Pinedale | 05/24/2023 |
| 307-417 | Rawlins | N/A |
| 307-418 | Jackson | 06/09/2023 |
| 307-419 | Cody | 3/24/2022 |
| 307-420 | Lingle | 05/24/2023 |
| 307-421 | Cheyenne | N/A |
| 307-422 | Chugwater | N/A |
| 307-423 | Buffalo | 11/5/2021 |
| 307-424 | Lake | 05/24/2023 |
| 307-425 | Buffalo | 3/30/2011 |
| 307-426 | Cheyenne | 5/22/2007 |
| 307-427 | Mammoth | 05/24/2023 |
| 307-428 | Douglas | 12/01/2023 |
| 307-429 | Sheridan | 5/23/2013 |
| 307-430 | Old Faithful | 12/11/2023 |
| 307-431 | Worland | N/A |
| 307-432 | Cheyenne | N/A |
| 307-433 | Cheyenne | N/A |
| 307-434 | Gillette | 02/05/2024 |
| 307-436 | Glenrock | N/A |
| 307-437 | Midwest | N/A |
| 307-438 | Lander | 6/19/2007 |
| 307-439 | Casper | N/A |
| 307-440 | Basin | N/A |
| 307-441 | Casper | N/A |
| 307-442 | Evanston | 02/29/2024 |
| 307-443 | Cheyenne | 6/18/2019 |
| 307-444 | Evanston | N/A |
| 307-445 | Kemmerer | 2/5/2021 |
| 307-446 | West Spearfish | 05/24/2023 |
| 307-447 | Saratoga | 10/8/2015 |
| 307-448 | Rock Springs | 5/12/2011 |
| 307-449 | Rock Springs | 03/27/2024 |
| 307-450 | Dubois | N/A |
| 307-451 | Rock Springs | 05/06/2024 |
| 307-452 | Casper | 05/30/2024 |
| 307-453 | Jackson | 06/06/2024 |
| 307-454 | Riverton | 06/07/2024 |
| 307-455 | Dubois | N/A |
| 307-456 | Big Piney | 7/22/2019 |
| 307-457 | Gas Hills | N/A |
| 307-458 | Casper | 12/10/2021 |
| 307-459 | Cheyenne | 6/11/2002 |
| 307-460 | Laramie | 6/11/2002 |
| 307-461 | Sheridan | 6/11/2002 |
| 307-462 | Casper | 6/11/2002 |
| 307-463 | Riverton | 6/11/2002 |
| 307-464 | Wright | N/A |
| 307-465 | Newcastle | N/A |
| 307-466 | Green River | N/A |
| 307-467 | Hulett | N/A |
| 307-468 | Upton | N/A |
| 307-469 | Hyattville | N/A |
| 307-471 | Lusk | 09/10/2024 |
| 307-472 | Casper | N/A |
| 307-473 | Casper | N/A |
| 307-475 | Cheyenne | 12/21/2016 |
| 307-477 | Cheyenne | N/A |
| 307-480 | Thermopolis | 6/15/2005 |
| 307-481 | Lusk | 3/14/2007 |
| 307-486 | Crowheart | N/A |
| 307-487 | Gillette | 10/9/2018 |
| 307-488 | Lander | 4/19/2018 |
| 307-489 | Shirley Basin | 5/30/2018 |
| 307-497 | Evanston | N/A |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 307-500 | Border | 2/5/2021 |
| 307-509 | Cheyenne | 9/5/2008 |
| 307-514 | Cheyenne | N/A |
| 307-520 | Medicine Bow | N/A |
| 307-522 | Rock Springs | 8/7/2017 |
| 307-527 | Cody | N/A |
| 307-529 | Cheyenne | 8/25/2009 |
| 307-532 | Torrington | N/A |
| 307-533 | Sheridan | N/A |
| 307-534 | Torrington | N/A |
| 307-537 | Pinedale | N/A |
| 307-540 | Jeffrey City | N/A |
| 307-541 | Moran | N/A |
| 307-543 | Moran | N/A |
| 307-544 | Jeffrey City | N/A |
| 307-545 | Old Faithful | N/A |
| 307-547 | Burns | N/A |
| 307-548 | Lovell | N/A |
| 307-549 | Old Faithful | N/A |
| 307-554 | Glenrock | N/A |
| 307-556 | Riverton | 2/5/2021 |
| 307-567 | Gillette | N/A |
| 307-568 | Basin | N/A |
| 307-575 | Torrington | 6/28/2002 |
| 307-576 | Leigh Canyon | N/A |
| 307-577 | Casper | N/A |
| 307-578 | Cody | N/A |
| 307-586 | Cody | 4/1/2005 |
| 307-587 | Cody | N/A |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 307-600 | Cokeville | N/A |
| 307-620 | Buffalo | N/A |
| 307-621 | Buffalo | N/A |
| 307-622 | Gillette | 11/24/2010 |
| 307-624 | Douglas | 10/3/2001 |
| 307-629 | Newcastle | 12/21/2004 |
| 307-630 | Cheyenne | N/A |
| 307-631 | Cheyenne | N/A |
| 307-632 | Cheyenne | N/A |
| 307-633 | Cheyenne | N/A |
| 307-634 | Cheyenne | N/A |
| 307-635 | Cheyenne | N/A |
| 307-637 | Cheyenne | N/A |
| 307-638 | Cheyenne | N/A |
| 307-640 | Cheyenne | N/A |
| 307-643 | West Spearfish | N/A |
| 307-645 | Clark | N/A |
| 307-649 | Carpenter | N/A |
| 307-650 | Cheyenne | N/A |
| 307-654 | Alpine | N/A |
| 307-655 | Sheridan | N/A |
| 307-656 | Alpine | 3/22/2007 |
| 307-660 | Gillette | N/A |
| 307-663 | West Edgemont | N/A |
| 307-664 | Frannie | N/A |
| 307-666 | Cheyenne | 5/23/2019 |
| 307-667 | Rawlins | 2/28/2021 |
| 307-670 | Gillette | N/A |
| 307-672 | Sheridan | N/A |
| 307-673 | Sheridan | N/A |
| 307-674 | Sheridan | N/A |
| 307-675 | Sheridan | 1/30/2003 |
| 307-677 | Evanston | N/A |
| 307-679 | Evanston | N/A |
| 307-680 | Gillette | N/A |
| 307-681 | Gillette | 4/16/2010 |
| 307-682 | Gillette | N/A |
| 307-683 | Sheridan | N/A |
| 307-684 | Buffalo | N/A |
| 307-685 | Gillette | N/A |
| 307-686 | Gillette | N/A |
| 307-687 | Gillette | N/A |
| 307-688 | Gillette | 5/24/2004 |
| 307-689 | Gillette | N/A |
| 307-690 | Jackson | N/A |
| 307-696 | Gillette | 9/22/2008 |
| 307-699 | Jackson | N/A |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 307-701 | Cheyenne | 12/27/2002 |
| 307-702 | Casper | 12/27/2002 |
| 307-703 | Laramie | 12/27/2002 |
| 307-704 | Gillette | 12/27/2002 |
| 307-705 | Rock Springs | 6/16/2003 |
| 307-706 | Sheridan | 12/27/2002 |
| 307-707 | Green River | 6/26/2003 |
| 307-708 | Evanston | 6/16/2003 |
| 307-709 | Riverton | 6/16/2003 |
| 307-710 | Rawlins | 6/16/2003 |
| 307-712 | Cody | 12/27/2002 |
| 307-713 | Jackson | 6/16/2003 |
| 307-714 | Lander | 6/16/2003 |
| 307-715 | Torrington | 12/27/2002 |
| 307-716 | Powell | 12/27/2002 |
| 307-717 | Douglas | 12/27/2002 |
| 307-718 | Worland | 12/27/2002 |
| 307-719 | Buffalo | 12/27/2002 |
| 307-720 | Wheatland | 12/27/2002 |
| 307-721 | Laramie | N/A |
| 307-722 | Thermopolis | 12/27/2002 |
| 307-723 | Kemmerer | 6/16/2003 |
| 307-724 | Casper | 6/16/2003 |
| 307-727 | Kemmerer | N/A |
| 307-728 | Shoshoni | N/A |
| 307-730 | Jackson | N/A |
| 307-731 | Lovell | 12/27/2002 |
| 307-732 | Jackson | N/A |
| 307-733 | Jackson | N/A |
| 307-734 | Jackson | N/A |
| 307-735 | Glendo | N/A |
| 307-736 | Arvada | N/A |
| 307-737 | Southeast Sheridan | N/A |
| 307-738 | Kaycee | N/A |
| 307-739 | Jackson | N/A |
| 307-740 | Jackson | N/A |
| 307-741 | Glenrock | 12/27/2002 |
| 307-742 | Laramie | N/A |
| 307-744 | Newcastle | 12/27/2002 |
| 307-745 | Laramie | N/A |
| 307-746 | Newcastle | N/A |
| 307-747 | Mt View | 6/16/2003 |
| 307-749 | Pinedale | 10/20/2003 |
| 307-750 | Decker | N/A |
| 307-751 | Sheridan | N/A |
| 307-752 | Sheridan | N/A |
| 307-754 | Powell | N/A |
| 307-755 | Laramie | N/A |
| 307-756 | Moorcroft | N/A |
| 307-757 | Cheyenne | N/A |
| 307-758 | Clearmont | N/A |
| 307-759 | Lusk | 10/20/2003 |
| 307-760 | Laramie | N/A |
| 307-761 | Laramie | N/A |
| 307-762 | Burlington | N/A |
| 307-763 | Sheridan | N/A |
| 307-764 | Powell | 4/1/2005 |
| 307-765 | Greybull | N/A |
| 307-766 | Laramie | N/A |
| 307-770 | Farson | 5/7/2020 |
| 307-771 | Cheyenne | N/A |
| 307-772 | Cheyenne | N/A |
| 307-773 | Cheyenne | N/A |
| 307-774 | Jackson | 6/22/2005 |
| 307-775 | Cheyenne | N/A |
| 307-776 | Casper | 3/9/2018 |
| 307-777 | Cheyenne | N/A |
| 307-778 | Cheyenne | N/A |
| 307-779 | Wheatland | 10/20/2003 |
| 307-780 | Mt View | N/A |
| 307-782 | Mt View | N/A |
| 307-783 | Evanston | N/A |
| 307-785 | West Bell Fourche | 4/19/2017 |
| 307-786 | Urie | N/A |
| 307-787 | Lyman | N/A |
| 307-788 | West Lyman | N/A |
| 307-789 | Evanston | N/A |
| 307-790 | Sundance | 12/18/2003 |
| 307-797 | Casper | 10/3/2001 |
| 307-798 | Rock River | 11/6/2007 |
| 307-799 | Evanston | N/A |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 307-800 | Kemmerer | 11/19/2012 |
| 307-823 | Cheyenne | 8/1/2012 |
| 307-828 | Kemmerer | N/A |
| 307-829 | Cheyenne | 11/21/2014 |
| 307-834 | La Grange | N/A |
| 307-836 | Guernsey | N/A |
| 307-837 | Lingle | N/A |
| 307-840 | Riverton | N/A |
| 307-849 | Border | N/A |
| 307-850 | Riverton | N/A |
| 307-851 | Riverton | N/A |
| 307-854 | Riverton | 12/10/2007 |
| 307-855 | Riverton | N/A |
| 307-856 | Riverton | N/A |
| 307-857 | Riverton | N/A |
| 307-858 | Riverton | N/A |
| 307-859 | Daniel | N/A |
| 307-864 | Thermopolis | N/A |
| 307-867 | Hamilton Dome | N/A |
| 307-868 | Meeteetse | N/A |
| 307-870 | Green River | N/A |
| 307-871 | Green River | N/A |
| 307-872 | Green River | N/A |
| 307-874 | Manila | N/A |
| 307-875 | Green River | N/A |
| 307-876 | Shoshoni | N/A |
| 307-877 | Kemmerer | N/A |
| 307-878 | South Alzada | N/A |
| 307-880 | Freedom | 6/22/2005 |
| 307-881 | Wheatland | 11/21/2014 |
| 307-883 | Freedom | N/A |
| 307-884 | Afton | N/A |
| 307-885 | Afton | N/A |
| 307-886 | Afton | N/A |
| 307-887 | Afton | 6/22/2005 |
| 307-888 | Old Faithful | 2/22/2017 |
| 307-890 | Freedom | N/A |
| 307-895 | Cheyenne | 3/31/2022 |
| 307-896 | West Bell Fourche | N/A |
| 307-899 | Cody | N/A |
| NPANXX | Area Served1 | Date2 |
|---|---|---|
| 307-900 | Glendo | 6/10/2020 |
| 307-910 | Cheyenne | 4/23/2021 |
| 307-920 | Cheyenne | N/A |
| 307-921 | Thermopolis | N/A |
| 307-922 | Rock Springs | N/A |
| 307-939 | Wright | N/A |
| 307-941 | Newcastle | N/A |
| 307-949 | Newcastle | N/A |
| 307-977 | Laramie | N/A |
| 307-990 | Lander | 04/04/2023 |
| 307-995 | Casper | N/A |
| 307-996 | Cheyenne | N/A |
| 307-998 | Sheridan | 06/14/2024 |
| 307-999 | Moran | 2/28/2017 |
- 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: November 22, 2024
Cities in area code 307
| City1 | County | Time Zone2 |
|---|---|---|
| Afton | Lincoln | M |
| Aladdin | Crook | M |
| Albin | Laramie | M |
| Alcova | Natrona | M |
| Alpine | Lincoln | M |
| Alva | Crook | M |
| Arapahoe | Fremont | M |
| Arminto | Natrona | M |
| Arvada | Sheridan | M |
| Auburn | Lincoln | M |
| Baggs | Carbon | M |
| Bairoil | Sweetwater | M |
| Banner | Sheridan | M |
| Basin | Big Horn | M |
| Bedford | Lincoln | M |
| Beulah | Crook | M |
| Big Horn | Sheridan | M |
| Big Piney | Sublette | M |
| Bondurant | Sublette | M |
| Bosler | Albany | M |
| Boulder | Sublette | M |
| Buffalo | Johnson | M |
| Buford | Albany | M |
| Burlington | Big Horn | M |
| Burns | Laramie | M |
| Byron | Big Horn | M |
| Carpenter | Laramie | M |
| Casper | Natrona | M |
| Centennial | Albany | M |
| Cheyenne | Laramie | M |
| Chugwater | Platte | M |
| Clearmont | Sheridan | M |
| Cody | Park | M |
| Cokeville | Lincoln | M |
| Cora | Sublette | M |
| Cowley | Big Horn | M |
| Crowheart | Fremont | M |
| Daniel | Sublette | M |
| Dayton | Sheridan | M |
| Deaver | Big Horn | M |
| Devils Tower | Crook | M |
| Diamondville | Lincoln | M |
| Dixon | Carbon | M |
| Douglas | Converse | M |
| Dubois | Fremont | M |
| Edgerton | Natrona | M |
| Elk Mountain | Carbon | M |
| Emblem | Big Horn | M |
| Encampment | Carbon | M |
| Etna | Lincoln | M |
| Evanston | Uinta | M |
| Evansville | Natrona | M |
| Fairview | Lincoln | M |
| Farson | Sweetwater | M |
| Fe Warren Afb | Laramie | M |
| Fort Bridger | Uinta | M |
| Fort Laramie | Goshen | M |
| Fort Washakie | Fremont | M |
| Four Corners | Weston | M |
| Frannie | Park | M |
| Freedom | Lincoln | M |
| Frontier | Lincoln | M |
| Garrett | Albany | M |
| Gillette | Campbell | M |
| Glendo | Platte | M |
| Glenrock | Converse | M |
| Granger | Sweetwater | M |
| Granite Canon | Laramie | M |
| Green River | Sweetwater | M |
| Greybull | Big Horn | M |
| Grover | Lincoln | M |
| Guernsey | Platte | M |
| Hanna | Carbon | M |
| Hartville | Platte | M |
| Hawk Springs | Goshen | M |
| Hiland | Natrona | M |
| Hillsdale | Laramie | M |
| Horse Creek | Laramie | M |
| Hudson | Fremont | M |
| Hulett | Crook | M |
| Huntley | Goshen | M |
| Hyattville | Big Horn | M |
| Jackson | Teton | M |
| Jay Em | Goshen | M |
| Jeffrey City | Fremont | M |
| Jelm | Albany | M |
| Kaycee | Johnson | M |
| Kelly | Teton | M |
| Kemmerer | Lincoln | M |
| Kinnear | Fremont | M |
| Kirby | Hot Springs | M |
| La Barge | Lincoln | M |
| Lagrange | Goshen | M |
| Lance Creek | Niobrara | M |
| Lander | Fremont | M |
| Laramie | Albany | M |
| Leiter | Sheridan | M |
| Linch | Johnson | M |
| Lingle | Goshen | M |
| Little America | Sweetwater | M |
| Lonetree | Uinta | M |
| Lost Springs | Converse | M |
| Lovell | Big Horn | M |
| Lusk | Niobrara | M |
| Lyman | Uinta | M |
| Lysite | Fremont | M |
| Manderson | Big Horn | M |
| Manville | Niobrara | M |
| Mc Kinnon | Sweetwater | M |
| Medicine Bow | Carbon | M |
| Meeteetse | Park | M |
| Meriden | Laramie | M |
| Midwest | Natrona | M |
| Mills | Natrona | M |
| Moorcroft | Crook | M |
| Moose | Teton | M |
| Moran | Teton | M |
| Mountain View | Uinta | M |
| Natrona | Natrona | M |
| Newcastle | Weston | M |
| Opal | Lincoln | M |
| Osage | Weston | M |
| Otto | Big Horn | M |
| Parkman | Sheridan | M |
| Pavillion | Fremont | M |
| Pine Bluffs | Laramie | M |
| Pinedale | Sublette | M |
| Point Of Rocks | Sweetwater | M |
| Powder River | Natrona | M |
| Powell | Park | M |
| Ralston | Park | M |
| Ranchester | Sheridan | M |
| Rawlins | Carbon | M |
| Recluse | Campbell | M |
| Reliance | Sweetwater | M |
| Riverton | Fremont | M |
| Robertson | Uinta | M |
| Rock River | Albany | M |
| Rock Springs | Sweetwater | M |
| Rozet | Campbell | M |
| Saddlestring | Johnson | M |
| Saratoga | Carbon | M |
| Savery | Carbon | M |
| Shawnee | Converse | M |
| Shell | Big Horn | M |
| Sheridan | Sheridan | M |
| Shirley Basin | Carbon | M |
| Shoshoni | Fremont | M |
| Sinclair | Carbon | M |
| Smoot | Lincoln | M |
| St Stephens | Fremont | M |
| Story | Sheridan | M |
| Sundance | Crook | M |
| Superior | Sweetwater | M |
| Ten Sleep | Washakie | M |
| Teton Village | Teton | M |
| Thayne | Lincoln | M |
| Thermopolis | Hot Springs | M |
| Tie Siding | Albany | M |
| Torrington | Goshen | M |
| Upton | Weston | M |
| Van Tassell | Niobrara | M |
| Veteran | Goshen | M |
| Walcott | Carbon | M |
| Wamsutter | Sweetwater | M |
| Wapiti | Park | M |
| Weston | Campbell | M |
| Wheatland | Platte | M |
| Wilson | Teton | M |
| Wolf | Sheridan | M |
| Worland | Washakie | M |
| Wright | Campbell | M |
| Wyarno | Sheridan | M |
| Yellowstone National Park | Park | M |
| Yoder | Goshen | M |
- Listed above are most places served by USA area code 307. 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.
- M stands for Mountain Time (currently ).