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301 Area Code

Area code 301 is in Maryland (MD), USA and some of the main locations it covers are Germantown, Frederick, Silver Spring, etc. (jump to city list below).

In service since January 01, 1947, area code 301 is the parent Numbering Plan Area in overlay complex 301/240/227 (overlaying NPAs cover the same area).

The current time for places served by area code 301 is 06:19:15 PM (Eastern Time Zone).

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301 phone number location

NPANXX Area served1 Date2
301-200 Indian Head 2/24/2011
301-201 Washington Zone 10 11/7/2022
301-202 Washington Zone 2 12/19/2008
301-203 Washington Zone 6 N/A
301-204 Washington Zone 2 N/A
301-205 Washington Zone 14 N/A
301-206 Washington Zone 13 N/A
301-207 Washington Zone 13 N/A
301-208 Gaithersburg N/A
301-209 Washington Zone 4 N/A
301-210 Laurel N/A
301-212 Washington Zone 10 N/A
301-213 Washington Zone 3 N/A
301-214 Washington Zone 2 N/A
301-215 Washington Zone 2 N/A
301-216 Gaithersburg N/A
301-217 Washington Zone 10 N/A
301-218 Washington Zone 14 N/A
301-219 Washington Zone 2 N/A
301-220 Washington Zone 13 N/A
301-221 Washington Zone 2 N/A
301-222 Washington Zone 2 N/A
301-223 Williamsport N/A
301-224 Washington Zone 2 N/A
301-225 Washington Zone 14 5/21/2009
301-226 Washington Zone 4 N/A
301-227 Washington Zone 2 N/A
301-228 Frederick N/A
301-229 Washington Zone 2 N/A
301-230 Washington Zone 11 N/A
301-231 Washington Zone 11 N/A
301-232 Ashton N/A
301-233 Washington Zone 3 N/A
301-234 Washington Zone 16 N/A
301-235 Washington Zone 16 N/A
301-236 Washington Zone 12 N/A
301-237 Washington Zone 3 N/A
301-238 Washington Zone 16 N/A
301-239 Washington Zone 4 N/A
301-240 Washington Zone 10 N/A
301-241 Highfield N/A
301-242 Brandywine N/A
301-243 Washington Zone 2 7/20/2006
301-244 Washington Zone 3 N/A
301-245 Bittinger N/A
301-246 Nanjemoy N/A
301-247 Leonardtown N/A
301-248 Washington Zone 6 N/A
301-249 Washington Zone 14 N/A
301-250 Gaithersburg N/A
301-251 Washington Zone 10 N/A
301-252 Gaithersburg N/A
301-253 Damascus N/A
301-254 Washington Zone 3 N/A
301-255 Washington Zone 11 N/A
301-256 Laurel N/A
301-257 Washington Zone 3 N/A
301-258 Washington Zone 10 N/A
301-259 Tompkinsville N/A
301-260 Ashton N/A
301-261 Washington Zone 14 N/A
301-262 Washington Zone 14 N/A
301-263 Washington Zone 2 N/A
301-264 Mt Savage N/A
301-265 Washington Zone 6 N/A
301-266 Waldorf N/A
301-267 Washington Zone 3 10/4/2011
301-268 Cumberland N/A
301-269 Washington Zone 2 11/11/2014
301-270 Washington Zone 3 N/A
301-271 Thurmont N/A
301-272 Washington Zone 2 N/A
301-273 Washington Zone 3 N/A
301-274 Hughesville N/A
301-275 Washington Zone 2 N/A
301-276 Washington Zone 4 N/A
301-277 Washington Zone 4 N/A
301-278 Washington Zone 5 N/A
301-279 Washington Zone 10 N/A
301-280 Washington Zone 2 N/A
301-281 Washington Zone 6 N/A
301-282 Washington Zone 12 N/A
301-283 Washington Zone 6 N/A
301-284 Washington Zone 10 N/A
301-285 Washington Zone 3 N/A
301-286 Washington Zone 13 N/A
301-287 Washington Zone 11 N/A
301-288 Washington Zone 12 N/A
301-289 Washington Zone 13 N/A
301-290 Mechanicsville N/A
301-291 Washington Zone 14 N/A
301-292 Washington Zone 6 N/A
301-293 Myersville N/A
301-294 Washington Zone 10 N/A
301-295 Washington Zone 2 N/A
301-296 Washington Zone 10 N/A
301-297 Washington Zone 16 N/A
301-298 Washington Zone 15 N/A
301-299 Washington Zone 10 N/A

NPANXX Area served1 Date2
301-300 Washington Zone 2 3/30/2007
301-301 Gaithersburg 8/30/2022
301-302 Hagerstown 10/5/2004
301-303 Washington Zone 13 N/A
301-304 Walkersville 3/6/2007
301-305 Frederick N/A
301-306 Washington Zone 4 N/A
301-307 Washington Zone 13 N/A
301-308 Washington Zone 13 N/A
301-309 Washington Zone 10 N/A
301-310 Laurel N/A
301-312 Washington Zone 2 N/A
301-313 Washington Zone 13 N/A
301-314 Washington Zone 4 N/A
301-315 Washington Zone 10 N/A
301-316 Washington Zone 5 N/A
301-317 Laurel N/A
301-318 Washington Zone 2 N/A
301-319 Washington Zone 2 N/A
301-320 Washington Zone 2 N/A
301-321 Washington Zone 11 N/A
301-322 Washington Zone 4 N/A
301-323 Laurel N/A
301-324 Washington Zone 5 N/A
301-325 Washington Zone 3 N/A
301-326 Washington Zone 3 N/A
301-327 Washington Zone 15 3/9/2006
301-328 Washington Zone 3 6/21/2006
301-329 Ashton N/A
301-330 Gaithersburg N/A
301-331 Hagerstown N/A
301-332 Washington Zone 3 N/A
301-333 Washington Zone 5 N/A
301-334 Oakland N/A
301-335 Washington Zone 2 N/A
301-336 Washington Zone 5 N/A
301-337 Gaithersburg N/A
301-338 Cumberland 1/31/2006
301-339 Washington Zone 10 N/A
301-340 Washington Zone 10 N/A
301-341 Washington Zone 4 N/A
301-342 Lexington Park-Great Mills N/A
301-343 Washington Zone 5 N/A
301-344 Washington Zone 13 N/A
301-345 Washington Zone 13 N/A
301-346 Washington Zone 3 N/A
301-347 Washington Zone 2 N/A
301-348 Washington Zone 11 N/A
301-349 Poolesville N/A
301-350 Washington Zone 5 N/A
301-351 Washington Zone 3 N/A
301-352 Washington Zone 14 N/A
301-353 Washington Zone 10 N/A
301-354 Washington Zone 10 N/A
301-355 Gaithersburg 12/8/2005
301-356 Laurel N/A
301-357 Washington Zone 3 10/12/2006
301-358 Washington Zone 15 N/A
301-359 Westernport N/A
301-360 Frederick N/A
301-361 Washington Zone 4 N/A
301-362 Laurel N/A
301-363 Damascus 8/16/2006
301-364 Washington Zone 4 N/A
301-365 Washington Zone 2 N/A
301-366 Gaithersburg N/A
301-367 Washington Zone 3 N/A
301-368 Damascus N/A
301-369 Washington Zone 13 N/A
301-370 Gaithersburg N/A
301-371 Middletown N/A
301-372 Washington Zone 16 N/A
301-373 Leonardtown N/A
301-374 Waldorf N/A
301-375 Indian Head N/A
301-376 Laurel N/A
301-377 Laurel N/A
301-378 Frederick 2/20/2007
301-379 Washington Zone 3 N/A
301-380 Washington Zone 2 N/A
301-381 Washington Zone 2 7/15/2022
301-382 Washington Zone 11 N/A
301-383 Washington Zone 14 N/A
301-384 Washington Zone 12 N/A
301-385 Washington Zone 2 N/A
301-386 Washington Zone 4 N/A
301-387 Oakland N/A
301-388 Washington Zone 12 N/A
301-389 Washington Zone 13 N/A
301-390 Washington Zone 14 N/A
301-391 Damascus N/A
301-392 La Plata N/A
301-393 Hagerstown N/A
301-394 Washington Zone 3 N/A
301-395 Laurel N/A
301-396 Waldorf N/A
301-397 Washington Zone 13 N/A
301-398 Washington Zone 10 10/9/2003
301-399 Waldorf N/A

NPANXX Area served1 Date2
301-400 Washington Zone 2 3/29/2010
301-401 Frederick N/A
301-402 Washington Zone 2 N/A
301-403 Washington Zone 4 N/A
301-404 Washington Zone 3 N/A
301-405 Washington Zone 4 N/A
301-406 Washington Zone 2 N/A
301-407 Gaithersburg N/A
301-408 Washington Zone 3 N/A
301-409 Washington Zone 2 12/21/2021
301-410 Washington Zone 6 5/5/2022
301-412 Washington Zone 2 N/A
301-413 Washington Zone 11 N/A
301-414 Damascus N/A
301-415 Washington Zone 3 N/A
301-416 Myersville N/A
301-417 Washington Zone 10 N/A
301-418 Frederick 11/20/2002
301-419 Washington Zone 13 N/A
301-420 Washington Zone 5 N/A
301-421 Ashton N/A
301-422 Washington Zone 4 N/A
301-423 Washington Zone 5 N/A
301-424 Washington Zone 10 N/A
301-425 Washington Zone 13 N/A
301-426 Washington Zone 13 N/A
301-427 Washington Zone 3 N/A
301-428 Washington Zone 10 N/A
301-429 Washington Zone 4 N/A
301-430 Washington Zone 14 N/A
301-431 Washington Zone 3 N/A
301-432 Keedysville N/A
301-433 Washington Zone 5 N/A
301-434 Washington Zone 3 N/A
301-435 Washington Zone 2 N/A
301-436 Washington Zone 4 N/A
301-437 Washington Zone 3 N/A
301-438 Washington Zone 12 N/A
301-439 Washington Zone 3 N/A
301-440 Washington Zone 5 N/A
301-441 Washington Zone 13 N/A
301-442 Washington Zone 3 N/A
301-443 Washington Zone 11 N/A
301-444 Washington Zone 10 N/A
301-445 Washington Zone 3 N/A
301-446 Washington Zone 13 N/A
301-447 Emmitsburg N/A
301-448 Washington Zone 3 N/A
301-449 Washington Zone 5 N/A
301-450 Washington Zone 3 7/15/2022
301-451 Washington Zone 2 N/A
301-452 Washington Zone 3 N/A
301-453 Kitzmiller N/A
301-454 Washington Zone 4 N/A
301-455 Washington Zone 3 N/A
301-456 Washington Zone 5 N/A
301-457 Washington Zone 3 N/A
301-458 Washington Zone 4 N/A
301-459 Washington Zone 4 N/A
301-460 Washington Zone 11 N/A
301-461 Washington Zone 10 N/A
301-462 Myersville N/A
301-463 Lonaconing N/A
301-464 Washington Zone 14 N/A
301-465 Myersville N/A
301-466 Washington Zone 3 N/A
301-467 Washington Zone 3 N/A
301-468 Washington Zone 11 N/A
301-469 Washington Zone 2 N/A
301-470 Washington Zone 14 N/A
301-471 Frederick N/A
301-472 Mechanicsville N/A
301-473 Frederick N/A
301-474 Washington Zone 13 N/A
301-475 Leonardtown N/A
301-476 Ashton N/A
301-477 Washington Zone 13 N/A
301-478 Flintstone N/A
301-479 Washington Zone 13 N/A
301-480 Washington Zone 2 N/A
301-481 Leonardtown N/A
301-482 Damascus N/A
301-483 Laurel N/A
301-484 Washington Zone 4 N/A
301-485 Washington Zone 6 N/A
301-486 Washington Zone 13 N/A
301-487 Myersville N/A
301-488 Washington Zone 13 N/A
301-489 Washington Zone 13 N/A
301-490 Laurel N/A
301-491 Hagerstown N/A
301-492 Washington Zone 2 N/A
301-493 Washington Zone 2 N/A
301-494 Washington Zone 15 N/A
301-495 Washington Zone 3 N/A
301-496 Washington Zone 2 N/A
301-497 Laurel N/A
301-498 Laurel N/A
301-499 Washington Zone 5 N/A

NPANXX Area served1 Date2
301-500 Washington Zone 2 N/A
301-501 Oakland N/A
301-502 Washington Zone 3 N/A
301-503 Washington Zone 2 N/A
301-504 Washington Zone 3 N/A
301-505 Washington Zone 6 N/A
301-506 Washington Zone 13 N/A
301-507 Washington Zone 13 N/A
301-508 Myersville N/A
301-509 Washington Zone 3 N/A
301-510 Washington Zone 13 N/A
301-512 Washington Zone 3 N/A
301-513 Washington Zone 13 N/A
301-514 Frederick N/A
301-515 Gaithersburg N/A
301-516 Washington Zone 5 N/A
301-517 Washington Zone 10 N/A
301-518 Washington Zone 3 N/A
301-519 Gaithersburg N/A
301-520 Washington Zone 3 N/A
301-521 Washington Zone 6 N/A
301-522 Washington Zone 11 N/A
301-523 Washington Zone 3 N/A
301-524 Frederick N/A
301-525 Gaithersburg 10/16/2003
301-526 Washington Zone 3 N/A
301-527 Gaithersburg N/A
301-528 Gaithersburg N/A
301-529 Washington Zone 10 N/A
301-530 Washington Zone 2 N/A
301-531 Washington Zone 4 N/A
301-532 Laurel 2/20/2015
301-533 Oakland N/A
301-534 Indian Head 11/15/2006
301-535 Waldorf N/A
301-536 Leonardtown N/A
301-537 Washington Zone 3 N/A
301-538 Washington Zone 2 N/A
301-539 La Plata N/A
301-540 Gaithersburg N/A
301-541 Washington Zone 5 N/A
301-542 Waldorf N/A
301-543 Laurel N/A
301-544 Washington Zone 10 N/A
301-545 Washington Zone 10 N/A
301-546 Washington Zone 4 4/7/2014
301-547 Washington Zone 2 N/A
301-548 Washington Zone 10 N/A
301-549 Ashton N/A
301-550 Washington Zone 10 7/26/2022
301-551 Washington Zone 3 N/A
301-552 Washington Zone 13 N/A
301-553 Waldorf N/A
301-554 Washington Zone 2 N/A
301-556 Gaithersburg N/A
301-557 Washington Zone 3 9/6/2011
301-558 Washington Zone 13 N/A
301-559 Washington Zone 4 N/A
301-560 Washington Zone 4 N/A
301-561 Washington Zone 3 N/A
301-562 Washington Zone 3 N/A
301-563 Washington Zone 3 N/A
301-564 Washington Zone 2 N/A
301-565 Washington Zone 3 N/A
301-566 Washington Zone 13 N/A
301-567 Washington Zone 6 N/A
301-568 Washington Zone 5 N/A
301-569 Gaithersburg N/A
301-570 Ashton N/A
301-571 Washington Zone 2 N/A
301-572 Washington Zone 3 N/A
301-573 Hagerstown N/A
301-574 Washington Zone 15 N/A
301-575 Laurel N/A
301-576 Washington Zone 3 N/A
301-577 Washington Zone 4 N/A
301-578 Washington Zone 3 N/A
301-579 Brandywine N/A
301-580 Washington Zone 3 N/A
301-581 Washington Zone 2 N/A
301-582 Hagerstown N/A
301-583 Washington Zone 4 N/A
301-584 Washington Zone 12 N/A
301-585 Washington Zone 3 N/A
301-586 Washington Zone 3 N/A
301-587 Washington Zone 3 N/A
301-588 Washington Zone 3 N/A
301-589 Washington Zone 3 N/A
301-590 Washington Zone 10 N/A
301-591 Gaithersburg N/A
301-592 Washington Zone 3 N/A
301-593 Washington Zone 3 N/A
301-594 Washington Zone 2 N/A
301-595 Washington Zone 13 N/A
301-596 Laurel N/A
301-597 Hancock N/A
301-598 Washington Zone 12 N/A
301-599 Washington Zone 5 N/A

NPANXX Area served1 Date2
301-600 Frederick 7/6/2006
301-601 Washington Zone 10 N/A
301-602 Washington Zone 3 N/A
301-603 Washington Zone 11 N/A
301-604 Laurel N/A
301-605 Washington Zone 10 N/A
301-606 Frederick N/A
301-607 Damascus N/A
301-608 Washington Zone 3 N/A
301-609 Waldorf N/A
301-610 Washington Zone 10 N/A
301-612 Washington Zone 14 10/11/2012
301-613 Washington Zone 3 N/A
301-614 Washington Zone 13 N/A
301-615 Washington Zone 13 N/A
301-616 Oakland N/A
301-617 Laurel N/A
301-618 Washington Zone 4 N/A
301-619 Frederick N/A
301-620 Frederick N/A
301-621 Washington Zone 14 N/A
301-622 Washington Zone 3 N/A
301-623 Washington Zone 13 N/A
301-624 Frederick N/A
301-625 Washington Zone 3 N/A
301-626 Washington Zone 3 N/A
301-627 Washington Zone 15 N/A
301-628 Washington Zone 3 N/A
301-629 Washington Zone 14 N/A
301-630 Washington Zone 6 N/A
301-631 Frederick N/A
301-632 Waldorf N/A
301-633 Washington Zone 2 N/A
301-634 Washington Zone 2 N/A
301-635 Washington Zone 5 7/27/2022
301-636 Washington Zone 5 N/A
301-637 Washington Zone 10 N/A
301-638 Waldorf N/A
301-639 Frederick N/A
301-640 Washington Zone 10 N/A
301-641 Washington Zone 3 N/A
301-642 Washington Zone 2 N/A
301-643 Waldorf N/A
301-644 Frederick N/A
301-645 Waldorf N/A
301-646 Washington Zone 2 N/A
301-647 Washington Zone 13 N/A
301-648 Washington Zone 2 N/A
301-649 Washington Zone 11 N/A
301-650 Washington Zone 3 N/A
301-651 Washington Zone 3 N/A
301-652 Washington Zone 2 N/A
301-653 Waldorf N/A
301-654 Washington Zone 2 N/A
301-655 Washington Zone 2 N/A
301-656 Washington Zone 2 N/A
301-657 Washington Zone 2 N/A
301-658 Ashton N/A
301-659 Waldorf N/A
301-660 Keedysville 3/19/2004
301-661 Washington Zone 2 N/A
301-662 Frederick N/A
301-663 Frederick N/A
301-664 Washington Zone 2 N/A
301-665 Hagerstown N/A
301-666 Washington Zone 14 N/A
301-667 Myersville N/A
301-668 Frederick N/A
301-669 Washington Zone 5 N/A
301-670 Washington Zone 10 N/A
301-671 Hagerstown N/A
301-672 Lexington Park-Great Mills N/A
301-673 Frederick N/A
301-674 Washington Zone 2 N/A
301-675 Washington Zone 3 N/A
301-676 Frederick N/A
301-677 Washington Zone 14 N/A
301-678 Hancock N/A
301-679 Washington Zone 12 N/A
301-680 Washington Zone 3 N/A
301-681 Washington Zone 3 N/A
301-682 Frederick N/A
301-683 Washington Zone 4 N/A
301-684 Indian Head N/A
301-685 Damascus N/A
301-686 Washington Zone 6 N/A
301-687 Frostburg N/A
301-688 Washington Zone 13 N/A
301-689 Frostburg N/A
301-690 Leonardtown 5/23/2007
301-691 Poolesville N/A
301-692 Washington Zone 11 N/A
301-693 Frederick N/A
301-694 Frederick N/A
301-695 Frederick N/A
301-696 Frederick N/A
301-697 Cumberland N/A
301-698 Frederick N/A
301-699 Washington Zone 4 N/A
NPANXX Area served1 Date2
301-701 Washington Zone 13 N/A
301-702 Washington Zone 5 N/A
301-703 Mount Airy 8/29/2002
301-704 Washington Zone 3 N/A
301-705 Waldorf N/A
301-706 Washington Zone 3 N/A
301-707 Cumberland N/A
301-708 Laurel N/A
301-709 Cumberland 5/28/2019
301-710 Waldorf 12/30/2005
301-712 Frederick N/A
301-713 Washington Zone 3 N/A
301-714 Hagerstown N/A
301-715 Washington Zone 15 N/A
301-716 Washington Zone 13 N/A
301-717 Washington Zone 3 N/A
301-718 Washington Zone 2 N/A
301-719 Washington Zone 16 N/A
301-720 Brandywine N/A
301-721 Washington Zone 10 N/A
301-722 Cumberland N/A
301-723 Cumberland N/A
301-724 Cumberland N/A
301-725 Laurel N/A
301-726 Kitzmiller 02/07/2023
301-727 Washington Zone 5 N/A
301-728 Washington Zone 3 N/A
301-729 Cumberland N/A
301-730 Myersville N/A
301-731 Washington Zone 4 N/A
301-732 Frederick N/A
301-733 Hagerstown N/A
301-734 Washington Zone 3 N/A
301-735 Washington Zone 5 N/A
301-736 Washington Zone 5 N/A
301-737 Lexington Park-Great Mills N/A
301-738 Washington Zone 10 N/A
301-739 Hagerstown N/A
301-740 Gaithersburg 4/22/2004
301-741 Laurel N/A
301-742 Washington Zone 2 N/A
301-743 Indian Head N/A
301-744 Indian Head N/A
301-745 Hagerstown N/A
301-746 Friendsville N/A
301-747 Washington Zone 6 N/A
301-748 Frederick N/A
301-749 Washington Zone 6 N/A
301-750 Friendsville 3/18/2004
301-751 Waldorf N/A
301-752 Waldorf N/A
301-753 Washington Zone 6 N/A
301-754 Washington Zone 3 N/A
301-755 Washington Zone 3 N/A
301-756 Washington Zone 14 N/A
301-757 Lexington Park-Great Mills N/A
301-758 Washington Zone 3 N/A
301-759 Cumberland N/A
301-760 Washington Zone 2 2/27/2002
301-761 Washington Zone 11 2/27/2002
301-762 Washington Zone 10 N/A
301-763 Washington Zone 5 N/A
301-764 Waldorf N/A
301-765 Washington Zone 10 N/A
301-766 Hagerstown N/A
301-767 Washington Zone 2 N/A
301-768 Washington Zone 3 2/27/2002
301-769 Leonardtown N/A
301-770 Washington Zone 11 N/A
301-771 Washington Zone 2 N/A
301-772 Washington Zone 4 N/A
301-773 Washington Zone 4 N/A
301-774 Ashton N/A
301-775 Washington Zone 3 N/A
301-776 Laurel N/A
301-777 Cumberland N/A
301-778 Washington Zone 5 N/A
301-779 Washington Zone 4 N/A
301-780 Washington Zone 15 N/A
301-781 Frostburg N/A
301-782 Brandywine N/A
301-783 Cumberland N/A
301-784 Cumberland N/A
301-785 Washington Zone 3 N/A
301-786 Mccoole N/A
301-787 Washington Zone 3 N/A
301-788 Frederick N/A
301-789 Washington Zone 4 8/13/2002
301-790 Hagerstown N/A
301-791 Hagerstown N/A
301-792 Washington Zone 3 N/A
301-793 Washington Zone 3 N/A
301-794 Washington Zone 14 N/A
301-795 Washington Zone 10 N/A
301-796 Washington Zone 13 6/30/2003
301-797 Hagerstown N/A
301-798 Damascus N/A
301-799 Keedysville 3/18/2004
NPANXX Area served1 Date2
301-800 Hagerstown N/A
301-801 Washington Zone 3 N/A
301-802 Washington Zone 3 N/A
301-803 Washington Zone 2 N/A
301-804 Ashton N/A
301-805 Washington Zone 14 N/A
301-806 Washington Zone 3 N/A
301-807 Washington Zone 3 N/A
301-808 Washington Zone 5 N/A
301-809 Washington Zone 14 N/A
301-810 Buckeyestown N/A
301-812 Washington Zone 15 N/A
301-813 Washington Zone 2 N/A
301-814 Washington Zone 2 N/A
301-815 Frederick N/A
301-816 Washington Zone 11 N/A
301-817 Washington Zone 5 N/A
301-818 Waldorf N/A
301-819 Washington Zone 3 N/A
301-820 Gaithersburg N/A
301-821 Laurel N/A
301-822 Washington Zone 11 N/A
301-823 Washington Zone 13 N/A
301-824 Smithsburg N/A
301-825 Washington Zone 10 N/A
301-826 Lexington Park-Great Mills N/A
301-827 Washington Zone 2 N/A
301-828 Washington Zone 2 N/A
301-829 Mount Airy N/A
301-830 Washington Zone 3 N/A
301-831 Damascus N/A
301-832 Washington Zone 4 N/A
301-833 Washington Zone 14 N/A
301-834 Brunswick N/A
301-835 Frederick 11/27/2018
301-836 Washington Zone 5 N/A
301-837 Washington Zone 13 N/A
301-838 Washington Zone 10 N/A
301-839 Washington Zone 6 N/A
301-840 Washington Zone 10 N/A
301-841 Washington Zone 2 N/A
301-842 Clear Spg N/A
301-843 Washington Zone 6 N/A
301-844 Washington Zone 3 10/4/2011
301-845 Walkersville N/A
301-846 Frederick N/A
301-847 Washington Zone 12 N/A
301-848 Waldorf N/A
301-849 Oakland N/A
301-850 Washington Zone 14 N/A
301-851 Washington Zone 4 N/A
301-852 Washington Zone 4 N/A
301-853 Washington Zone 4 N/A
301-854 Ashton N/A
301-855 Washington Zone 15 N/A
301-856 Washington Zone 16 N/A
301-857 Clear Spg 7/12/2002
301-858 Washington Zone 14 N/A
301-859 Oakland 1/9/2002
301-860 Washington Zone 14 N/A
301-861 Waldorf N/A
301-862 Lexington Park-Great Mills N/A
301-863 Lexington Park-Great Mills N/A
301-864 Washington Zone 4 N/A
301-865 New Market N/A
301-866 Lexington Park-Great Mills N/A
301-867 Washington Zone 14 N/A
301-868 Washington Zone 16 N/A
301-869 Gaithersburg N/A
301-870 Washington Zone 6 N/A
301-871 Washington Zone 11 N/A
301-872 Ridge N/A
301-873 Washington Zone 3 N/A
301-874 Buckeyestown N/A
301-875 Laurel N/A
301-876 Cumberland 5/2002
301-877 Washington Zone 16 N/A
301-878 Baltimore N/A
301-879 Washington Zone 12 N/A
301-880 Lexington Park-Great Mills N/A
301-881 Washington Zone 11 N/A
301-882 New Market 3/18/2004
301-883 Washington Zone 5 N/A
301-884 Mechanicsville N/A
301-885 Waldorf N/A
301-886 Washington Zone 13 N/A
301-887 Washington Zone 4 N/A
301-888 Washington Zone 16 N/A
301-889 Washington Zone 14 N/A
301-890 Washington Zone 12 N/A
301-891 Washington Zone 3 N/A
301-892 Washington Zone 4 3/11/2005
301-893 Washington Zone 6 N/A
301-894 Washington Zone 6 N/A
301-895 Grantsville N/A
301-896 Washington Zone 2 N/A
301-897 Washington Zone 2 N/A
301-898 Frederick N/A
301-899 Washington Zone 5 N/A

NPANXX Area served1 Date2
301-900 Washington Zone 2 2/18/2015
301-901 Washington Zone 13 N/A
301-902 Washington Zone 13 N/A
301-903 Washington Zone 10 N/A
301-904 Leonardtown N/A
301-905 Washington Zone 3 N/A
301-906 Washington Zone 2 N/A
301-907 Washington Zone 2 N/A
301-908 Washington Zone 3 N/A
301-909 Washington Zone 5 N/A
301-910 Washington Zone 2 N/A
301-912 Washington Zone 14 N/A
301-913 Washington Zone 2 N/A
301-914 Oakland 12/27/2012
301-915 Washington Zone 2 N/A
301-916 Gaithersburg N/A
301-917 Washington Zone 10 N/A
301-918 Washington Zone 4 N/A
301-919 Washington Zone 2 N/A
301-920 Washington Zone 3 N/A
301-921 Washington Zone 10 N/A
301-922 Washington Zone 3 N/A
301-923 Washington Zone 13 N/A
301-924 Washington Zone 12 N/A
301-925 Washington Zone 5 N/A
301-926 Gaithersburg N/A
301-927 Washington Zone 4 N/A
301-928 Washington Zone 3 N/A
301-929 Washington Zone 11 N/A
301-930 Washington Zone 3 N/A
301-931 Washington Zone 13 N/A
301-932 Waldorf N/A
301-933 Washington Zone 11 N/A
301-934 La Plata N/A
301-935 Washington Zone 13 N/A
301-936 Hagerstown 6/2017
301-937 Washington Zone 13 N/A
301-938 Washington Zone 3 N/A
301-939 Washington Zone 13 N/A
301-940 Washington Zone 2 N/A
301-941 Washington Zone 2 N/A
301-942 Washington Zone 11 N/A
301-943 Washington Zone 3 N/A
301-944 Gaithersburg N/A
301-945 Washington Zone 11 N/A
301-946 Washington Zone 11 N/A
301-947 Gaithersburg N/A
301-948 Washington Zone 10 N/A
301-949 Washington Zone 11 N/A
301-951 Washington Zone 2 N/A
301-952 Washington Zone 15 N/A
301-953 Washington Zone 13 N/A
301-955 Washington Zone 4 N/A
301-956 Gaithersburg 5/22/2002
301-957 Laurel N/A
301-960 Washington Zone 3 N/A
301-961 Washington Zone 2 N/A
301-962 Washington Zone 11 N/A
301-963 Gaithersburg N/A
301-964 Myersville N/A
301-965 Washington Zone 6 N/A
301-966 Washington Zone 12 N/A
301-967 Washington Zone 5 N/A
301-968 Washington Zone 2 N/A
301-969 Brunswick 3/6/2007
301-970 Washington Zone 14 N/A
301-971 Washington Zone 6 N/A
301-972 Gaithersburg N/A
301-973 Washington Zone 14 N/A
301-974 Laurel N/A
301-975 Washington Zone 10 N/A
301-977 Gaithersburg N/A
301-978 Washington Zone 10 N/A
301-979 Washington Zone 10 N/A
301-980 Washington Zone 3 N/A
301-981 Washington Zone 5 N/A
301-982 Washington Zone 13 N/A
301-983 Washington Zone 10 N/A
301-984 Washington Zone 11 N/A
301-985 Washington Zone 4 N/A
301-986 Washington Zone 2 N/A
301-987 Gaithersburg N/A
301-988 Hagerstown N/A
301-989 Washington Zone 12 N/A
301-990 Gaithersburg N/A
301-991 Hagerstown N/A
301-992 Hagerstown N/A
301-993 Washington Zone 13 N/A
301-994 Lexington Park-Great Mills N/A
301-995 Lexington Park-Great Mills N/A
301-996 Washington Zone 3 N/A
301-997 Leonardtown N/A
301-998 Washington Zone 11 N/A
  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 301

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 301. 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 06:19:15 PM).
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