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240 Area Code

Area code 240 is in Maryland (MD), USA and some of the main locations it covers are Germantown, Rockville, Gaithersburg, etc. (jump to city list below).

In service since June 01, 1997, area code 240 is an overlay Numbering Plan Area, part of overlay complex 301/240/227 (overlaying NPAs cover the same area).

The current time for places served by area code 240 is 04:03:04 PM (Eastern Time Zone).

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240 phone number location

NPANXX Area served1 Date2
240-200 Washington Zone 2 10/4/2010
240-201 Ridge N/A
240-202 Highfield 5/28/2020
240-203 Hagerstown 10/4/2011
240-204 Washington Zone 2 9/7/2011
240-205 Washington Zone 10 7/23/2003
240-206 Washington Zone 14 N/A
240-207 Damascus N/A
240-208 La Plata N/A
240-209 Indian Head N/A
240-210 Waldorf N/A
240-212 Oakland N/A
240-213 Waldorf N/A
240-214 Mechanicsville N/A
240-215 Frederick N/A
240-216 Waldorf 3/15/2001
240-217 Hagerstown 4/16/2001
240-218 Nanjemoy N/A
240-219 Ridge 9/22/2014
240-220 Poolesville N/A
240-221 Washington Zone 11 N/A
240-222 Waldorf N/A
240-223 Washington Zone 2 N/A
240-224 Gaithersburg 9/10/2012
240-225 Frederick N/A
240-226 Oakland 7/16/2020
240-227 Myersville 07/25/2023
240-228 Washington Zone 13 N/A
240-229 Waldorf N/A
240-230 Hughesville N/A
240-231 Hagerstown N/A
240-232 Washington Zone 14 N/A
240-233 Tompkinsville N/A
240-234 Washington Zone 2 10/4/2011
240-235 Washington Zone 2 N/A
240-236 Frederick N/A
240-237 Lexington Park-Great Mills N/A
240-238 Washington Zone 10 N/A
240-239 Leonardtown N/A
240-240 Damascus 7/2/2020
240-241 Washington Zone 13 N/A
240-242 Washington Zone 11 N/A
240-243 Gaithersburg N/A
240-244 Washington Zone 16 N/A
240-245 Washington Zone 14 N/A
240-246 Gaithersburg N/A
240-247 Washington Zone 3 N/A
240-248 Ridge N/A
240-249 Mechanicsville N/A
240-250 Brandywine N/A
240-251 Highfield N/A
240-252 Gaithersburg N/A
240-253 Washington Zone 6 N/A
240-254 Hughesville N/A
240-255 Poolesville N/A
240-256 Leonardtown N/A
240-257 Nanjemoy N/A
240-258 Ridge N/A
240-259 Hughesville 4/22/2021
240-260 Washington Zone 14 N/A
240-261 Gaithersburg 12/23/2015
240-262 Lexington Park-Great Mills 10/17/2011
240-263 Washington Zone 2 11/10/2011
240-264 Laurel N/A
240-265 Washington Zone 2 11/10/2011
240-266 Washington Zone 14 N/A
240-267 Hagerstown 5/18/2017
240-268 Washington Zone 10 N/A
240-269 Washington Zone 16 N/A
240-270 Waldorf 11/7/2011
240-271 Washington Zone 2 N/A
240-272 Washington Zone 2 11/10/2011
240-273 Washington Zone 6 N/A
240-274 Washington Zone 2 N/A
240-275 Grantsville N/A
240-276 Washington Zone 10 5/4/2004
240-277 Washington Zone 2 10/18/2002
240-278 Laurel 7/8/2011
240-279 Waldorf N/A
240-280 Laurel N/A
240-281 Washington Zone 2 N/A
240-282 Mechanicsville N/A
240-283 Washington Zone 11 N/A
240-284 Frostburg 11/1/2004
240-285 Frederick N/A
240-286 Washington Zone 2 9/17/2002
240-287 Hancock N/A
240-288 Thurmont 11/1/2004
240-289 Washington Zone 6 N/A
240-290 Washington Zone 11 N/A
240-291 Hagerstown 10/15/2002
240-292 Washington Zone 11 N/A
240-293 Washington Zone 12 N/A
240-294 Laurel N/A
240-295 Laurel N/A
240-296 Washington Zone 4 N/A
240-297 Washington Zone 13 N/A
240-298 Leonardtown N/A
240-299 Waldorf N/A

NPANXX Area served1 Date2
240-300 Waldorf 12/7/2010
240-301 Clear Spg 6/9/2020
240-302 Laurel 9/28/2016
240-303 Washington Zone 16 N/A
240-304 Washington Zone 5 7/3/2002
240-305 Washington Zone 3 N/A
240-306 Gaithersburg N/A
240-307 Emmitsburg 3/27/2003
240-308 Damascus N/A
240-309 Leonardtown 9/10/2012
240-310 Hagerstown N/A
240-312 Washington Zone 5 N/A
240-313 Hagerstown N/A
240-314 Washington Zone 10 N/A
240-315 Frederick N/A
240-316 Washington Zone 2 N/A
240-317 Lexington Park-Great Mills N/A
240-318 Washington Zone 16 N/A
240-319 Laurel 6/6/2008
240-320 Waldorf N/A
240-321 Oakland N/A
240-322 Mccoole N/A
240-323 Emmitsburg N/A
240-324 Ashton 10/8/2008
240-325 Damascus N/A
240-326 Washington Zone 15 N/A
240-327 Gaithersburg N/A
240-328 Washington Zone 10 N/A
240-329 Hagerstown N/A
240-330 Washington Zone 2 12/14/2007
240-331 Washington Zone 3 N/A
240-332 Tompkinsville N/A
240-333 Washington Zone 2 5/9/2001
240-334 Washington Zone 14 N/A
240-335 Washington Zone 14 N/A
240-336 Washington Zone 2 N/A
240-337 Washington Zone 5 N/A
240-338 Washington Zone 3 N/A
240-339 Washington Zone 15 N/A
240-340 Washington Zone 2 8/18/2011
240-341 Buckeyestown 2/25/2009
240-342 Ashton N/A
240-343 Hancock 5/10/2011
240-344 Frederick 10/15/2002
240-345 Ashton 3/9/2006
240-346 Waldorf N/A
240-347 Hagerstown 8/4/2008
240-348 Washington Zone 16 N/A
240-349 La Plata N/A
240-350 Washington Zone 3 N/A
240-351 Washington Zone 3 N/A
240-352 La Plata N/A
240-353 Washington Zone 3 N/A
240-354 Washington Zone 3 N/A
240-355 Washington Zone 3 N/A
240-356 Myersville N/A
240-357 Frederick 6/12/2006
240-358 Damascus N/A
240-359 Indian Head N/A
240-360 Laurel 9/17/2013
240-361 Gaithersburg N/A
240-362 Cumberland N/A
240-363 Washington Zone 11 N/A
240-364 Gaithersburg 5/9/2001
240-365 Damascus N/A
240-366 Williamsport N/A
240-367 Frederick 10/18/2002
240-368 Waldorf N/A
240-369 Mount Airy N/A
240-370 Washington Zone 2 12/14/2007
240-371 Washington Zone 12 N/A
240-372 Gaithersburg N/A
240-373 Washington Zone 13 N/A
240-374 Laurel N/A
240-375 Washington Zone 5 N/A
240-376 Hughesville N/A
240-377 Indian Head N/A
240-378 Cumberland N/A
240-379 Frederick N/A
240-380 Washington Zone 2 9/17/2007
240-381 Washington Zone 3 N/A
240-382 Hagerstown 6/11/2009
240-383 Washington Zone 2 N/A
240-384 Lexington Park-Great Mills N/A
240-385 Myersville N/A
240-386 Washington Zone 10 N/A
240-387 Washington Zone 13 N/A
240-388 Gaithersburg 11/4/2002
240-389 Ashton N/A
240-390 Ashton N/A
240-391 Washington Zone 13 N/A
240-392 Washington Zone 5 N/A
240-393 Washington Zone 3 N/A
240-394 Mount Airy 12/13/2004
240-395 Washington Zone 2 N/A
240-396 Washington Zone 2 N/A
240-397 Frederick 3/6/2009
240-398 Washington Zone 3 7/3/2002
240-399 Washington Zone 10 N/A

NPANXX Area served1 Date2
240-400 Washington Zone 2 8/18/2011
240-401 Washington Zone 10 N/A
240-402 Washington Zone 13 9/21/2010
240-403 Washington Zone 10 N/A
240-404 Gaithersburg 2/13/2001
240-405 Frederick 7/27/2004
240-406 Washington Zone 10 9/17/2009
240-407 Washington Zone 16 N/A
240-408 Washington Zone 10 10/14/2009
240-409 Frederick N/A
240-410 Cumberland 1/13/2021
240-412 Waldorf 1/16/2001
240-413 Washington Zone 4 3/12/2001
240-414 Washington Zone 6 N/A
240-415 Frederick 12/16/2008
240-416 Waldorf 5/18/2001
240-417 Washington Zone 5 N/A
240-418 Washington Zone 2 11/12/2001
240-419 Waldorf 10/29/2007
240-420 Hagerstown N/A
240-421 Washington Zone 10 4/9/2001
240-422 Frederick 5/15/2002
240-423 Washington Zone 3 5/21/2001
240-424 Washington Zone 3 11/16/2007
240-425 Washington Zone 2 N/A
240-426 Washington Zone 2 10/25/2001
240-427 Waldorf 4/23/2001
240-428 Washington Zone 10 N/A
240-429 Washington Zone 3 12/19/2006
240-430 Washington Zone 11 N/A
240-431 Lexington Park-Great Mills N/A
240-432 Washington Zone 3 N/A
240-433 Washington Zone 12 N/A
240-434 Leonardtown N/A
240-435 Waldorf 5/7/2009
240-436 Buckeyestown N/A
240-437 Ashton N/A
240-438 Washington Zone 3 8/15/2011
240-439 Frederick 6/6/2008
240-440 Frederick 2/27/2009
240-441 Washington Zone 6 6/6/2001
240-442 Oakland 5/22/2001
240-443 Washington Zone 6 11/6/2020
240-444 Laurel 9/7/2011
240-445 Washington Zone 2 11/10/2011
240-446 Frederick 8/9/2001
240-447 Washington Zone 10 N/A
240-448 Waldorf 9/7/2011
240-449 Gaithersburg N/A
240-450 Washington Zone 3 N/A
240-451 Thurmont 9/2/2016
240-452 Hagerstown 7/22/2010
240-453 Washington Zone 10 N/A
240-454 Gaithersburg 4/22/2005
240-455 Washington Zone 5 6/20/2001
240-456 Laurel N/A
240-457 Frederick 9/4/2008
240-458 Waldorf 10/4/2011
240-459 Laurel 7/27/2010
240-460 Washington Zone 3 N/A
240-461 Washington Zone 3 N/A
240-462 Washington Zone 3 N/A
240-463 Washington Zone 3 N/A
240-464 Washington Zone 2 N/A
240-465 Washington Zone 2 N/A
240-466 Mechanicsville 7/10/2001
240-467 Washington Zone 4 4/25/2013
240-468 Washington Zone 3 11/16/2007
240-469 Hagerstown 2/14/2008
240-470 Laurel 10/4/2011
240-471 Washington Zone 12 N/A
240-472 Washington Zone 3 N/A
240-473 Washington Zone 13 N/A
240-474 Gaithersburg 5/22/2015
240-475 Washington Zone 3 N/A
240-476 Washington Zone 3 2/21/2001
240-477 Gaithersburg 5/20/2005
240-478 Washington Zone 3 7/27/2004
240-479 Washington Zone 2 4/7/2008
240-480 Washington Zone 2 9/27/2010
240-481 Washington Zone 3 5/11/2001
240-482 Washington Zone 2 N/A
240-483 Washington Zone 2 N/A
240-484 Laurel 6/12/2017
240-485 Washington Zone 3 N/A
240-486 Washington Zone 14 3/12/2001
240-487 Washington Zone 4 N/A
240-488 Oakland 5/16/2012
240-489 Poolesville 2/13/2001
240-490 Middletown 6/12/2001
240-491 Washington Zone 3 N/A
240-492 Washington Zone 5 N/A
240-493 Washington Zone 6 N/A
240-494 Washington Zone 3 5/9/2001
240-495 Washington Zone 4 10/29/2013
240-496 Leonardtown 3/17/2016
240-497 Washington Zone 2 N/A
240-498 Washington Zone 2 N/A
240-499 Washington Zone 10 N/A

NPANXX Area served1 Date2
240-500 Hagerstown 10/21/2010
240-501 Washington Zone 3 10/8/2001
240-502 Washington Zone 3 10/4/2011
240-503 Tompkinsville 4/9/2013
240-504 Washington Zone 3 10/4/2011
240-505 Washington Zone 3 10/31/2001
240-506 Washington Zone 10 1/9/2002
240-507 Washington Zone 2 9/5/2008
240-508 Washington Zone 5 N/A
240-509 Washington Zone 14 3/31/2008
240-510 Washington Zone 15 N/A
240-512 Washington Zone 13 8/8/2006
240-513 Hagerstown 10/19/2011
240-514 Washington Zone 11 N/A
240-515 Washington Zone 2 6/20/2001
240-516 Washington Zone 12 N/A
240-517 Laurel 10/28/2014
240-518 Waldorf 10/21/2011
240-519 Washington Zone 2 11/10/2011
240-520 Hagerstown 3/29/2006
240-521 Laurel 1/11/2018
240-522 Cumberland 12/12/2001
240-523 La Plata 2/13/2001
240-524 Laurel N/A
240-525 Washington Zone 15 N/A
240-526 Leonardtown N/A
240-527 Hagerstown N/A
240-528 Hughesville N/A
240-529 Frederick N/A
240-530 Waldorf 8/1/2013
240-531 Washington Zone 3 3/7/2017
240-532 Washington Zone 5 10/29/2013
240-533 Washington Zone 3 N/A
240-534 Washington Zone 2 4/11/2016
240-535 Washington Zone 3 1/9/2001
240-536 Ashton N/A
240-537 Hagerstown 9/15/2017
240-538 Leonardtown 2/13/2001
240-539 Washington Zone 4 N/A
240-540 Washington Zone 13 10/5/2016
240-541 Washington Zone 2 10/31/2011
240-542 Washington Zone 13 N/A
240-543 Washington Zone 2 7/25/2006
240-544 Washington Zone 14 N/A
240-545 Washington Zone 15 N/A
240-546 Washington Zone 16 N/A
240-547 Laurel N/A
240-548 Washington Zone 14 N/A
240-549 Frederick 3/17/2016
240-550 Washington Zone 10 3/26/2009
240-551 Washington Zone 10 3/25/2009
240-552 Washington Zone 10 3/25/2009
240-553 Washington Zone 13 N/A
240-554 Laurel N/A
240-556 Washington Zone 14 N/A
240-557 Washington Zone 6 3/14/2017
240-558 Washington Zone 11 N/A
240-559 Ashton N/A
240-560 Washington Zone 12 4/23/2001
240-561 Leonardtown 7/7/2008
240-562 Gaithersburg 6/12/2015
240-563 Washington Zone 5 7/5/2017
240-564 Laurel 12/21/2018
240-565 Laurel 12/30/2005
240-566 Frederick 6/11/2002
240-567 Washington Zone 10 7/12/2006
240-568 Laurel N/A
240-569 Flintstone 9/22/2017
240-570 Ashton 2/24/2016
240-571 Laurel 1/14/2021
240-572 Leonardtown 11/15/2017
240-573 Washington Zone 15 N/A
240-574 Friendsville 8/27/2020
240-575 Frederick 12/30/2005
240-576 Hagerstown 12/20/2017
240-577 Leonardtown 8/9/2006
240-578 Frederick 7/8/2011
240-579 Ashton 1/11/2018
240-580 Cumberland 6/14/2001
240-581 Laurel N/A
240-582 Washington Zone 4 N/A
240-583 Laurel 4/28/2010
240-584 Laurel 1/11/2018
240-585 Waldorf 6/29/2011
240-586 Frederick 12/22/2006
240-587 Leonardtown 7/6/2009
240-588 Grantsville 2/1/2018
240-589 Mccoole 3/7/2018
240-590 Washington Zone 12 4/9/2018
240-591 Hagerstown 4/17/2018
240-592 Washington Zone 13 7/1/2016
240-593 Laurel 3/13/2001
240-594 Bittinger 5/15/2018
240-595 Washington Zone 3 9/13/2006
240-596 Ashton 6/11/2018
240-597 Gaithersburg N/A
240-598 Hughesville 6/11/2018
240-599 Washington Zone 10 N/A

NPANXX Area served1 Date2
240-600 Washington Zone 2 4/27/2011
240-601 Washington Zone 3 N/A
240-602 Washington Zone 3 N/A
240-603 Washington Zone 3 N/A
240-604 Washington Zone 3 N/A
240-605 Washington Zone 3 N/A
240-606 Washington Zone 3 N/A
240-607 Waldorf N/A
240-608 Frederick 3/11/2013
240-609 Cumberland 9/11/2014
240-610 Washington Zone 4 6/11/2018
240-612 Washington Zone 5 N/A
240-613 Washington Zone 4 4/5/2012
240-614 Washington Zone 10 7/16/2013
240-615 Washington Zone 4 5/29/2013
240-616 Washington Zone 13 N/A
240-617 Highfield 7/16/2015
240-618 Washington Zone 10 10/7/2014
240-619 Washington Zone 5 N/A
240-620 Washington Zone 10 N/A
240-621 Washington Zone 11 N/A
240-622 La Plata 6/11/2018
240-623 Washington Zone 4 12/8/2014
240-624 Washington Zone 13 N/A
240-625 Hagerstown 4/17/2001
240-626 Frederick N/A
240-627 Washington Zone 11 N/A
240-628 Mechanicsville 6/11/2018
240-629 Frederick N/A
240-630 Washington Zone 2 10/31/2011
240-631 Gaithersburg N/A
240-632 Gaithersburg N/A
240-633 Hughesville 5/22/2015
240-634 Ridge 6/11/2018
240-635 Tompkinsville 6/11/2018
240-636 Laurel N/A
240-637 Washington Zone 3 6/11/2018
240-638 Washington Zone 3 N/A
240-639 Laurel 6/1/2018
240-640 Waldorf 3/24/2009
240-641 Washington Zone 3 N/A
240-642 Washington Zone 10 8/2/2018
240-643 Washington Zone 3 5/16/2002
240-644 Washington Zone 2 N/A
240-645 Washington Zone 3 N/A
240-646 Laurel N/A
240-647 Clear Spg 6/11/2018
240-648 Keedysville 6/12/2018
240-649 Smithsburg 6/12/2018
240-650 Washington Zone 3 11/17/2011
240-651 Frederick N/A
240-652 Mechanicsville 2/13/2001
240-653 Laurel N/A
240-654 Gaithersburg 5/19/2006
240-655 Kitzmiller 12/18/2017
240-656 Frederick 8/30/2019
240-657 Frostburg 1/6/2016
240-658 Gaithersburg 12/4/2018
240-659 Ashton 1/30/2019
240-660 Washington Zone 10 3/31/2015
240-661 Lexington Park-Great Mills 5/21/2015
240-662 Washington Zone 3 N/A
240-663 Middletown 1/30/2019
240-664 Cumberland 3/6/2019
240-665 Washington Zone 10 1/9/2017
240-666 Nanjemoy 6/25/2015
240-667 Washington Zone 4 N/A
240-668 Damascus N/A
240-669 Washington Zone 11 N/A
240-670 Washington Zone 3 3/6/2012
240-671 Washington Zone 2 N/A
240-672 Washington Zone 10 N/A
240-673 Washington Zone 2 5/17/2019
240-674 Frederick N/A
240-675 Myersville N/A
240-676 Washington Zone 3 N/A
240-677 Washington Zone 5 5/20/2019
240-678 Washington Zone 3 N/A
240-679 Friendsville 6/11/2018
240-680 Frederick 10/29/2018
240-681 Brandywine 10/30/2003
240-682 Waldorf N/A
240-683 Gaithersburg N/A
240-684 Washington Zone 13 N/A
240-685 Brandywine N/A
240-686 Gaithersburg N/A
240-687 Washington Zone 3 N/A
240-688 Washington Zone 3 6/12/2006
240-689 Washington Zone 15 5/28/2019
240-690 Gaithersburg 11/10/2016
240-691 Washington Zone 5 N/A
240-692 Grantsville 5/30/2019
240-693 Walkersville 9/25/2019
240-694 Washington Zone 2 N/A
240-695 Washington Zone 5 N/A
240-696 Washington Zone 4 N/A
240-697 Mechanicsville 9/12/2019
240-698 Myersville 10/15/2019
240-699 Buckeyestown 5/22/2001
NPANXX Area served1 Date2
240-701 Washington Zone 3 3/25/2009
240-702 Gaithersburg 10/7/2014
240-703 Ashton 2/10/2021
240-704 Washington Zone 3 3/25/2009
240-705 Washington Zone 3 3/25/2009
240-706 Washington Zone 3 3/26/2009
240-707 Hagerstown 1/27/2012
240-708 Laurel 6/8/2012
240-709 Laurel 10/25/2019
240-710 Frederick 12/30/2019
240-712 Laurel 11/1/2011
240-713 Laurel 11/2/2011
240-714 Washington Zone 4 2/20/2015
240-715 Washington Zone 10 N/A
240-716 Washington Zone 5 11/15/2013
240-717 Leonardtown 4/22/2021
240-718 Lexington Park-Great Mills 2/13/2001
240-719 Washington Zone 5 4/11/2016
240-720 Gaithersburg N/A
240-721 Washington Zone 5 3/19/2020
240-722 Ashton N/A
240-723 Washington Zone 3 N/A
240-724 Washington Zone 6 N/A
240-725 Lexington Park-Great Mills N/A
240-726 Washington Zone 4 9/1/2020
240-727 Cumberland N/A
240-728 Washington Zone 10 5/12/2020
240-729 Ashton 6/16/2020
240-730 Hagerstown 8/12/2020
240-731 Washington Zone 10 N/A
240-732 Mount Airy 11/12/2015
240-733 Ashton 7/15/2020
240-734 Smithsburg 3/22/2012
240-735 Brunswick 9/1/2020
240-736 Laurel 9/2/2020
240-737 Washington Zone 4 5/9/2001
240-738 Hancock 9/3/2020
240-739 Frederick 9/15/2020
240-740 Washington Zone 10 9/3/2015
240-741 Frederick 10/1/2020
240-742 Washington Zone 14 11/20/2020
240-743 Washington Zone 2 11/16/2006
240-744 Washington Zone 2 N/A
240-745 Damascus N/A
240-746 Brandywine 12/4/2020
240-747 Washington Zone 11 5/9/2001
240-748 Washington Zone 3 12/23/2020
240-749 Laurel 1/12/2021
240-750 Gaithersburg 5/6/2005
240-751 Gaithersburg N/A
240-752 Washington Zone 2 N/A
240-753 Washington Zone 10 N/A
240-754 Waldorf 11/11/2011
240-755 Laurel 1/5/2006
240-756 Washington Zone 10 2/10/2021
240-757 Washington Zone 13 N/A
240-758 Laurel 3/3/2016
240-759 Washington Zone 15 3/25/2021
240-760 Washington Zone 2 9/22/2015
240-761 Laurel 7/20/2021
240-762 Washington Zone 2 8/22/2012
240-763 Washington Zone 15 10/1/2015
240-764 Washington Zone 4 N/A
240-765 Washington Zone 5 N/A
240-766 Washington Zone 6 N/A
240-767 Washington Zone 5 5/9/2001
240-768 Nanjemoy 4/22/2021
240-769 Keedysville 7/20/2021
240-770 Washington Zone 4 11/22/2004
240-771 Poolesville 2/18/2016
240-772 Frederick 11/17/2011
240-773 Washington Zone 10 N/A
240-774 Lonaconing 10/5/2015
240-775 Westernport 10/5/2015
240-776 La Plata N/A
240-777 Washington Zone 10 N/A
240-778 Washington Zone 10 N/A
240-779 Ashton N/A
240-780 Gaithersburg N/A
240-781 Washington Zone 2 8/18/2015
240-782 Damascus N/A
240-783 Washington Zone 2 N/A
240-784 Myersville 6/6/2001
240-785 Oakland 7/20/2021
240-786 Laurel N/A
240-787 Brandywine N/A
240-788 Washington Zone 5 N/A
240-789 Washington Zone 10 8/10/2021
240-790 Washington Zone 13 N/A
240-791 Washington Zone 4 8/11/2021
240-792 Frederick 8/11/2021
240-793 Gaithersburg 3/15/2001
240-794 Lexington Park-Great Mills N/A
240-795 Washington Zone 5 8/12/2021
240-796 Washington Zone 10 8/25/2021
240-797 Ashton 8/25/2021
240-798 Gaithersburg 9/1/2021
240-799 Brandywine 6/26/2020
NPANXX Area served1 Date2
240-800 Washington Zone 2 6/22/2012
240-801 Gaithersburg 10/4/2013
240-802 Washington Zone 2 5/10/2013
240-803 Cumberland 1/27/2012
240-804 Tompkinsville 4/23/2001
240-805 Gaithersburg 11/17/2015
240-806 Indian Head 9/30/2015
240-807 Cumberland 9/1/2021
240-808 Leonardtown 3/31/2015
240-809 Smithsburg 9/1/2021
240-810 Washington Zone 10 4/5/2016
240-812 Poolesville N/A
240-813 Gaithersburg N/A
240-814 Laurel 5/20/2022
240-815 Frederick 11/17/2015
240-816 Keedysville 10/5/2015
240-817 Ashton 1/12/2016
240-818 Myersville N/A
240-819 Williamsport 9/1/2021
240-820 Ashton 3/25/2021
240-821 Washington Zone 3 5/27/2005
240-822 New Market 3/15/2021
240-823 Brandywine 2/13/2001
240-824 Frostburg 3/15/2021
240-825 Washington Zone 4 3/17/2016
240-826 Washington Zone 10 5/7/2007
240-827 Lonaconing 9/1/2021
240-828 Washington Zone 4 N/A
240-829 Emmitsburg 9/12/2019
240-830 Washington Zone 5 11/10/2015
240-831 Frederick 4/26/2016
240-832 Washington Zone 2 N/A
240-833 Washington Zone 11 N/A
240-834 Kitzmiller 3/15/2021
240-835 Clear Spg 6/3/2021
240-836 Mt Savage 9/1/2021
240-837 Hughesville 2/13/2001
240-838 Washington Zone 5 3/12/2001
240-839 Washington Zone 3 1/13/2007
240-840 Frederick 6/19/2018
240-841 Laurel N/A
240-842 Washington Zone 14 N/A
240-843 Washington Zone 13 N/A
240-844 Ridge 2/13/2001
240-845 Washington Zone 13 N/A
240-846 Washington Zone 16 N/A
240-847 Washington Zone 3 12/9/2015
240-848 Gaithersburg N/A
240-849 Hagerstown 9/8/2021
240-850 Hagerstown 5/25/2016
240-851 Mccoole 7/16/2020
240-852 Myersville 9/13/2021
240-853 Laurel 9/28/2021
240-854 Washington Zone 4 12/7/2021
240-855 Washington Zone 2 10/9/2006
240-856 Laurel 4/11/2016
240-857 Washington Zone 5 N/A
240-858 Washington Zone 2 7/12/2016
240-859 Ashton 7/11/2016
240-860 Cumberland 8/23/2016
240-861 Ashton 10/7/2021
240-862 Mt Savage 9/2/2016
240-863 Washington Zone 3 N/A
240-864 Washington Zone 10 5/9/2001
240-865 Washington Zone 14 N/A
240-866 Hagerstown 9/20/2019
240-867 Washington Zone 3 6/20/2017
240-868 Washington Zone 12 5/9/2001
240-869 Washington Zone 10 10/7/2021
240-870 Middletown 9/2/2016
240-871 Lexington Park-Great Mills 10/7/2021
240-872 Washington Zone 6 10/7/2021
240-873 Buckeyestown 10/10/2019
240-874 Thurmont 10/10/2019
240-875 Mount Airy 10/10/2019
240-876 Washington Zone 2 N/A
240-877 Frederick 8/25/2016
240-878 Hagerstown 8/3/2017
240-879 Washington Zone 4 10/7/2021
240-880 Washington Zone 11 N/A
240-881 Washington Zone 13 11/4/2021
240-882 Washington Zone 5 N/A
240-883 Ashton N/A
240-884 Tompkinsville 4/29/2021
240-885 Washington Zone 10 1/21/2021
240-886 Washington Zone 4 11/17/2021
240-887 Ashton 12/7/2021
240-888 Washington Zone 10 N/A
240-889 Washington Zone 10 12/6/2021
240-890 Washington Zone 5 12/7/2021
240-891 Damascus 12/10/2021
240-892 Washington Zone 15 N/A
240-893 Washington Zone 3 N/A
240-894 Lexington Park-Great Mills 12/10/2021
240-895 Lexington Park-Great Mills N/A
240-896 Hagerstown 12/28/2021
240-897 Washington Zone 16 N/A
240-898 Washington Zone 4 N/A
240-899 Washington Zone 2 3/13/2001

NPANXX Area served1 Date2
240-900 Washington Zone 4 2/18/2015
240-901 La Plata 5/22/2014
240-902 Damascus 12/28/2021
240-903 Indian Head 12/3/2013
240-904 Laurel 6/23/2016
240-905 Brandywine 1/10/2022
240-906 Washington Zone 4 N/A
240-907 Washington Zone 10 7/12/2016
240-908 Walkersville 9/2/2016
240-909 Laurel 1/11/2022
240-910 Frederick 3/3/2021
240-912 Gaithersburg N/A
240-913 Damascus 9/2/2016
240-914 Highfield 1/11/2022
240-915 New Market N/A
240-916 Cumberland 1/11/2022
240-917 Laurel 11/12/2015
240-918 Ashton 10/20/2016
240-919 Ashton 1/26/2022
240-920 Cumberland 5/3/2001
240-921 Washington Zone 10 1/26/2022
240-922 Washington Zone 11 7/15/2020
240-923 Washington Zone 6 1/26/2022
240-924 Mount Airy 2/10/2022
240-925 Leonardtown 8/9/2001
240-926 Hughesville 5/18/2022
240-927 Washington Zone 4 5/18/2022
240-928 Myersville 5/26/2022
240-929 Washington Zone 14 N/A
240-930 Laurel 6/29/2022
240-931 Frederick 6/30/2022
240-932 Washington Zone 14 6/30/2022
240-933 Buckeyestown 2/28/2022
240-934 Middletown 2/12/2021
240-935 Laurel 7/12/2022
240-936 Ashton 5/18/2022
240-937 Gaithersburg 7/22/2022
240-938 Ashton 6/6/2001
240-939 Washington Zone 11 7/26/2022
240-940 Washington Zone 4 7/26/2022
240-941 Washington Zone 2 8/3/2022
240-942 Bittinger 3/15/2021
240-943 Frostburg 8/5/2022
240-944 Westernport 3/15/2021
240-945 Washington Zone 3 11/6/2020
240-946 Washington Zone 14 10/25/2021
240-947 Myersville 8/16/2022
240-948 Leonardtown 8/25/2022
240-949 Washington Zone 16 5/9/2001
240-951 Hagerstown 3/24/2022
240-952 Hagerstown 3/24/2022
240-953 Hagerstown 3/24/2022
240-954 Hagerstown 3/24/2022
240-955 La Plata 8/25/2022
240-956 Washington Zone 2 11/6/2020
240-957 Damascus 8/25/2022
240-960 Washington Zone 4 9/1/2022
240-961 Poolesville 9/22/2022
240-962 Laurel 10/6/2022
240-963 Washington Zone 03 10/18/2022
240-964 Cumberland 5/27/2008
240-965 Washington Zone 13 N/A
240-966 Washington Zone 16 2/25/2022
240-967 Cumberland 10/19/2022
240-968 Laurel 10/21/2022
240-969 Walkersville 11/7/2022
240-970 Washington Zone 12 6/2/2015
240-971 Frederick 8/2/2016
240-972 Laurel 5/26/2015
240-973 Washington Zone 12 12/1/2022
240-974 Washington Zone 10 12/21/2022
240-975 Laurel 12/30/2022
240-977 Washington Zone 6 02/22/2023
240-978 Ashton 01/06/2023
240-979 Cumberland N/A
240-980 Leonardtown 01/09/2023
240-981 Gaithersburg 02/10/2023
240-982 Gaithersburg 01/13/2023
240-983 Hagerstown 02/10/2023
240-984 New Market 02/27/2023
240-985 Williamsport 10/17/2016
240-986 Nanjemoy 2/13/2001
240-987 Washington Zone 10 04/05/2023
240-988 Washington Zone 3 N/A
240-989 Myersville 04/20/2023
240-990 Laurel 05/03/2023
240-991 Ashton 05/05/2023
240-992 Washington Zone 10 05/05/2023
240-993 Indian Head 2/13/2001
240-994 Washington Zone 10 N/A
240-995 Flintstone 5/8/2020
240-996 Brunswick 10/17/2016
240-997 Washington Zone 3 N/A
240-998 Hancock 10/17/2016
  1. 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.
  2. Assignment date. N/A - mostly CO codes assigned before 2001.
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Cities in area code 240

City1 County Time2
Abell St Marys E
Accident Garrett E
Accokeek Prince George's E
Adamstown Frederick E
Andrews Afb Prince George's E
Aquasco Prince George's E
Ashton Montgomery E
Avenue St Marys E
Barnesville Montgomery E
Barton Allegany E
Beallsville Montgomery E
Bel Alton Charles E
Beltsville Prince George's E
Benedict Charles E
Bethesda Montgomery E
Big Pool Washington E
Bittinger Garrett E
Bladensburg Prince George's E
Bloomington Garrett E
Boonsboro Washington E
Bowie Prince George's E
Boyds Montgomery E
Braddock Heights Frederick E
Brandywine Prince George's E
Brentwood Prince George's E
Brinklow Montgomery E
Brookeville Montgomery E
Brownsville Washington E
Brunswick Frederick E
Bryans Road Charles E
Bryantown Charles E
Buckeystown Frederick E
Burkittsville Frederick E
Burtonsville Montgomery E
Bushwood St Marys E
Cabin John Montgomery E
California St Marys E
Callaway St Marys E
Capitol Heights Prince George's E
Cascade Washington E
Cavetown Washington E
Chaptico St Marys E
Charlotte Hall St Marys E
Cheltenham Prince George's E
Chevy Chase Montgomery E
Chewsville Washington E
Clarksburg Montgomery E
Clear Spring Washington E
Clements St Marys E
Clinton Prince George's E
Cobb Island Charles E
College Park Prince George's E
Coltons Point St Marys E
Compton St Marys E
Corriganville Allegany E
Cumberland Allegany E
Damascus Montgomery E
Dameron St Marys E
Derwood Montgomery E
Dickerson Montgomery E
District Heights Prince George's E
Drayden St Marys E
Eckhart Mines Allegany E
Ellerslie Allegany E
Emmitsburg Frederick E
Fairplay Washington E
Faulkner Charles E
Flintstone Allegany E
Fort Washington Prince George's E
Frederick Frederick E
Friendship Anne Arundel E
Friendsville Garrett E
Frostburg Allegany E
Funkstown Washington E
Gaithersburg Montgomery E
Garrett Park Montgomery E
Germantown Montgomery E
Glen Echo Montgomery E
Glenn Dale Prince George's E
Grantsville Garrett E
Great Mills St Marys E
Greenbelt Prince George's E
Hagerstown Washington E
Hancock Washington E
Helen St Marys E
Highland Howard E
Hollywood St Marys E
Hughesville Charles E
Hyattsville Prince George's E
Ijamsville Frederick E
Indian Head Charles E
Ironsides Charles E
Issue Charles E
Jefferson Frederick E
Keedysville Washington E
Kensington Montgomery E
Kitzmiller Garrett E
Knoxville Frederick E
La Plata Charles E
Ladiesburg Frederick E
Lanham Prince George's E
Laurel Anne Arundel E
Leonardtown St Marys E
Lexington Park St Marys E
Libertytown Frederick E
Little Orleans Allegany E
Lonaconing Allegany E
Loveville St Marys E
Luke Allegany E
Marbury Charles E
Maugansville Washington E
Mc Henry Garrett E
Mechanicsville St Marys E
Middletown Frederick E
Midland Allegany E
Midlothian Allegany E
Monrovia Frederick E
Montgomery Village Montgomery E
Morganza St Marys E
Mount Airy Frederick E
Mount Rainier Prince George's E
Mount Savage Allegany E
Mount Victoria Charles E
Myersville Frederick E
Nanjemoy Charles E
New Market Frederick E
New Midway Frederick E
Newburg Charles E
Oakland Garrett E
Oldtown Allegany E
Olney Montgomery E
Owings Calvert E
Oxon Hill Prince George's E
Park Hall St Marys E
Patuxent River St Marys E
Piney Point St Marys E
Pinto Allegany E
Point Of Rocks Frederick E
Pomfret Charles E
Poolesville Montgomery E
Port Tobacco Charles E
Potomac Montgomery E
Rawlings Allegany E
Ridge St Marys E
Riverdale Prince George's E
Rock Point Charles E
Rockville Montgomery E
Rocky Ridge Frederick E
Rohrersville Washington E
Sabillasville Frederick E
Sandy Spring Montgomery E
Scotland St Marys E
Sharpsburg Washington E
Silver Spring Montgomery E
Smithsburg Washington E
Southern MD Facility Prince George's E
Spencerville Montgomery E
Spring Gap Allegany E
St Inigoes St Marys E
St James Washington E
St Marys City St Marys E
Suburb Maryland Fac Montgomery E
Suitland Prince George's E
Swanton Garrett E
Takoma Park Montgomery E
Tall Timbers St Marys E
Temple Hills Prince George's E
Thurmont Frederick E
Tuscarora Frederick E
Unionville Frederick E
Upper Marlboro Prince George's E
Valley Lee St Marys E
Waldorf Charles E
Walkersville Frederick E
Washington Grove Montgomery E
Welcome Charles E
Westernport Allegany E
White Plains Charles E
Williamsport Washington E
Woodsboro Frederick E
  1. Listed above are most places served by area code 240. When multiple places in a state/province share the same name we list the largest one only. Cities with population over 50,000 are displayed in bold text.
  2. E stands for Eastern Time Zone (currently 04:03:04 PM).
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