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Area Code 301

Area code 301 is in Maryland, USA , spanning 11 counties and serving 180 cities, including Germantown, Frederick or Silver Spring; it currently uses 784 prefixes, assigned from 301-200-XXXX through 301-998-XXXX.

In service since January 01, 1947, area code 301 is the parent Numbering Plan Area in overlay complex 301/240/227.

The current local time is .

301 area code location on a map
© OpenStreetMap contributors
For exact NPA boundaries see official 301 area code map

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More Maryland area codes:

Locate any 301-NXX prefix:

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 5/2/2002
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 6/2/2017
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 central office codes assigned before 2001.
  3. NXX prefixes last updated: March 1st, 2025

Cities in area code 301

City1 County Time Zone2
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 USA area code 301. 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.
  2. E stands for Eastern Time (currently ).
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