Area Code 301

301 is the area code for Maryland’s portion of the Washington, DC metro area, including portions of southern Maryland, and points northwest of DC. This area encompasses Cumberland, Frederick, Hagerstown, and Gaithersburg. The 301 area code served as the area code for the entire state of Maryland until 1991. Today, 301 overlays the 240 area code.

Prefix City/State Phone Type Company
301-200 Indian Head, MD Landline Bandwidth.com Clec
301-208 Gaithersburg, MD Landline Verizon Maryland
301-210 Beltsville, MD Landline Verizon Maryland
301-216 Gaithersburg, MD Landline Verizon Maryland
301-223 Williamsport, MD Landline Verizon Maryland
301-228 Frederick, MD Landline Verizon Maryland
301-232 Sandy Spring, MD Landline Mci Worldcom Communications
301-242 Brandywine, MD Landline Mcimetro Access Transmission Services LLC
301-245 Bittinger, MD Landline Verizon Maryland
301-246 Nanjemoy, MD Landline Verizon Maryland
301-247 Leonardtown, MD Cell New Cingular Wireless PCS - DC
301-250 Rockville, MD Landline Mci Worldcom Communications
301-252 Gaithersburg, MD Cell Sprint Spectrum L.p.
301-253 Damascus, MD Landline Verizon Maryland
301-256 Laurel, MD Landline Mci Worldcom Communications
301-260 Ashton, MD Landline Verizon Maryland
301-264 Mount Savage, MD Landline Verizon Maryland
301-266 Waldorf, MD Cell New Cingular Wireless PCS - DC
301-268 Cumberland, MD Cell Uscoc Of Cumberland DBA United States Cel Md
301-271 Thurmont, MD Landline Verizon Maryland
301-274 Hughesville, MD Landline Verizon Maryland
301-290 Mechanicsville, MD Landline Verizon Maryland
301-293 Myersville, MD Landline Verizon Maryland
301-302 Hagerstown, MD Landline Sprint Spectrum L.p.
301-304 Frederick, MD Landline Comcast Phone Of Northern Maryland
301-305 Frederick, MD Cell Sprint Spectrum L.p.
301-310 Columbia, MD Landline Verizon Maryland
301-317 Laurel, MD Landline Verizon Maryland
301-323 Laurel, MD Landline Tw Telecom Of Maryland LLC
301-329 Greenbelt, MD Cell Cavalier Telephone Mid-atlantic
301-330 Gaithersburg, MD Landline Verizon Maryland
301-331 Hagerstown, MD Cell New Cingular Wireless PCS - DC
301-334 Oakland, MD Landline Verizon Maryland
301-337 Gaithersburg, MD Landline Mci Worldcom Communications
301-338 Cumberland, MD Landline Idt America Corp
301-349 Poolesville, MD Landline Verizon Maryland
301-355 Gaithersburg, MD Landline Verizon Maryland
301-356 Laurel, MD Landline Vdl DBA Global Telecom Brokers
301-359 Westernport, MD Landline Verizon Maryland
301-360 Frederick, MD Landline Verizon Maryland
301-362 Laurel, MD Landline Verizon Maryland
301-363 Damascus, MD Landline Level 3 Communications
301-366 Gaithersburg, MD Cell Sprint Spectrum L.p.
301-368 Damascus, MD Landline Verizon Maryland
301-370 Gaithersburg, MD Cell Sprint Spectrum L.p.
301-371 Middletown, MD Landline Verizon Maryland
301-373 Hollywood, MD Landline Verizon Maryland
301-374 Waldorf, MD Landline Verizon Maryland
301-375 Bryans Road, MD Landline Verizon Maryland
301-376 Laurel, MD Cell Verizon Maryland
301-377 Laurel, MD Landline Comcast Phone Of Northern Maryland
301-378 Frederick, MD Landline Comcast Phone Of Northern Maryland
301-387 Swanton, MD Landline Verizon Maryland
301-391 Damascus, MD Landline Verizon Maryland
301-392 La Plata, MD Landline Verizon Maryland
301-393 Hagerstown, MD Landline Verizon Maryland
301-395 Laurel, MD Cell Cellco Partnership DBA Verizon Wireless
301-396 Waldorf, MD Landline Verizon Maryland
301-399 Waldorf, MD Cell Sprint Spectrum L.p.
301-401 Frederick, MD Cell New Cingular Wireless PCS - DC
301-407 Poolesville, MD Landline Verizon Maryland
301-414 Damascus, MD Landline Verizon Maryland
301-416 Williamsport, MD Landline Verizon Maryland
301-418 Frederick, MD Landline Verizon Maryland
301-421 Silver Spring, MD Landline Verizon Maryland
301-432 Keedysville, MD Landline Verizon Maryland
301-447 Emmitsburg, MD Landline Verizon Maryland
301-453 Kitzmiller, MD Landline Verizon Maryland
301-462 Myersville, MD Cell Sprint Spectrum L.p.
301-463 Lonaconing, MD Landline Verizon Maryland
301-465 Myersville, MD Cell Sprint Spectrum L.p.
301-471 Frederick, MD Cell Cellco Partnership DBA Verizon Wireless
301-472 Mechanicsville, MD Landline Verizon Maryland
301-473 Frederick, MD Landline Verizon Maryland
301-475 Leonardtown, MD Landline Verizon Maryland
301-476 Silver Spring, MD Landline Verizon Maryland
301-478 Oldtown, MD Landline Verizon Maryland
301-481 Leonardtown, MD Cell Cellco Partnership DBA Verizon Wireless
301-482 Damascus, MD Landline Verizon Maryland
301-483 Laurel, MD Landline Verizon Maryland
301-487 Myersville, MD Landline Verizon Maryland
301-490 Laurel, MD Landline Verizon Maryland
301-491 Hagerstown, MD Cell Uscoc Of Cumberland DBA United States Cel Md
301-497 Laurel, MD Landline Verizon Maryland
301-498 Laurel, MD Landline Verizon Maryland
301-501 Oakland, MD Cell New Cingular Wireless PCS - DC
301-508 Myersville, MD Cell New Cingular Wireless PCS - DC
301-514 Frederick, MD Cell Cellco Partnership DBA Verizon Wireless
301-515 Gaithersburg, MD Landline Verizon Maryland
301-519 Gaithersburg, MD Landline Verizon Maryland
301-524 Frederick, MD Cell Sprint Spectrum L.p.
301-525 Gaithersburg, MD Landline Quantum Telecommunications
301-527 Gaithersburg, MD Landline Verizon Maryland
301-528 Gaithersburg, MD Landline Verizon Maryland
301-533 Oakland, MD Landline Verizon Maryland
301-534 Indian Head, MD Landline Ymax Communications Corp.
301-535 Waldorf, MD Cell New Cingular Wireless PCS - DC
301-536 Leonardtown, MD Cell Sprint Spectrum L.p.
301-539 La Plata, MD Landline Teleport Communications America - DC
301-540 Gaithersburg, MD Landline Verizon Maryland
301-542 Waldorf, MD Landline Teleport Communications America - DC
301-543 Laurel, MD Landline Teleport Communications America - DC
301-549 Laurel, MD Landline Verizon Maryland
301-553 Waldorf, MD Cell Usa Mobility Wireless
301-556 Gaithersburg, MD Landline Teleport Communications America - DC
301-569 Gaithersburg, MD Cell Cellco Partnership DBA Verizon Wireless
301-570 Ashton, MD Landline Verizon Maryland
301-573 Hagerstown, MD Cell Sprint Spectrum L.p.
301-575 Laurel, MD Landline Us Lec Of Maryland
301-579 Brandywine, MD Landline Verizon Maryland
301-582 Hagerstown, MD Landline Verizon Maryland
301-591 Gaithersburg, MD Landline Paetec Communications
301-596 Columbia, MD Landline Verizon Maryland
301-597 Hancock, MD Landline New Frontiers Telecommunications
301-600 Frederick, MD Landline Verizon Maryland
301-604 Laurel, MD Landline Verizon Maryland
301-606 Frederick, MD Cell Cellco Partnership DBA Verizon Wireless
301-607 New Market, MD Landline Verizon Maryland
301-609 La Plata, MD Landline Verizon Maryland
301-616 Oakland, MD Cell Uscoc Of Cumberland DBA United States Cel Md
301-617 Laurel, MD Landline Verizon Maryland
301-619 Frederick, MD Landline Verizon Maryland
301-620 Frederick, MD Landline Verizon Maryland
301-624 Frederick, MD Landline Verizon Maryland
301-631 Frederick, MD Landline Verizon Maryland
301-632 Waldorf, MD Landline Verizon Maryland
301-635 Myersville, MD Landline New Frontiers Telecommunications
301-638 Waldorf, MD Landline Verizon Maryland
301-639 Frederick, MD Cell Cellco Partnership DBA Verizon Wireless
301-643 Waldorf, MD Cell Cellco Partnership DBA Verizon Wireless
301-644 Frederick, MD Landline Verizon Maryland
301-645 Waldorf, MD Landline Verizon Maryland
301-653 Waldorf, MD Cell New Cingular Wireless PCS - DC
301-658 Sandy Spring, MD Landline Teleport Communications America - DC
301-659 Waldorf, MD Cell New Cingular Wireless PCS - DC
301-660 Keedysville, MD Cell New Cingular Wireless PCS - DC
301-662 Frederick, MD Landline Verizon Maryland
301-663 Frederick, MD Landline Verizon Maryland
301-665 Hagerstown, MD Landline Verizon Maryland
301-667 Myersville, MD Cell New Cingular Wireless PCS - DC
301-668 Frederick, MD Landline Verizon Maryland
301-671 Hagerstown, MD Landline New Frontiers Telecommunications
301-673 Frederick, MD Landline New Frontiers Telecommunications
301-676 Frederick, MD Cell New Cingular Wireless PCS - DC
301-678 Hancock, MD Landline Verizon Maryland
301-682 Frederick, MD Landline Verizon Maryland
301-684 Indian Head, MD Landline Teleport Communications America - DC
301-685 Damascus, MD Landline Teleport Communications America - DC
301-687 Frostburg, MD Landline Verizon Maryland
301-689 Frostburg, MD Landline Verizon Maryland
301-690 Leonardtown, MD Landline Idt America Corp
301-691 Poolesville, MD Landline Teleport Communications America - DC
301-693 Frederick, MD Cell Omnipoint Communications Cap Operations
301-694 Frederick, MD Landline Verizon Maryland
301-695 Frederick, MD Landline Verizon Maryland
301-696 Frederick, MD Landline Verizon Maryland
301-697 Cumberland, MD Cell New Cingular Wireless PCS - DC
301-698 Frederick, MD Landline Verizon Maryland
301-703 Mount Airy, MD Landline Level 3 Communications
301-705 Waldorf, MD Landline Verizon Maryland
301-707 Cumberland, MD Cell Uscoc Of Cumberland DBA United States Cel Md
301-708 Greenbelt, MD Cell Cavalier Telephone Mid-atlantic
301-710 Waldorf, MD Landline Level 3 Communications
301-712 Frederick, MD Landline Mci Worldcom Communications
301-714 Hagerstown, MD Landline Verizon Maryland
301-720 Brandywine, MD Landline Teleport Communications America - DC
301-722 Cumberland, MD Landline Verizon Maryland
301-723 Cumberland, MD Landline Verizon Maryland
301-724 Cumberland, MD Landline Verizon Maryland
301-725 Laurel, MD Landline Verizon Maryland
301-729 Cumberland, MD Landline Verizon Maryland
301-730 Myersville, MD Cell New Cingular Wireless PCS - DC
301-732 Greenbelt, MD Cell Metro PCS
301-733 Hagerstown, MD Landline Verizon Maryland
301-739 Hagerstown, MD Landline Verizon Maryland
301-740 Gaithersburg, MD Landline Verizon Maryland
301-741 Laurel, MD Landline Level 3 Communications
301-743 Indian Head, MD Landline Verizon Maryland
301-744 Indian Head, MD Landline Verizon Maryland
301-745 Hagerstown, MD Landline Verizon Maryland
301-746 Accident, MD Landline Verizon Maryland
301-748 Frederick, MD Cell Sprint Spectrum L.p.
301-750 Friendsville, MD Landline Core Communications
301-751 Waldorf, MD Cell Cellco Partnership DBA Verizon Wireless
301-752 Waldorf, MD Cell Cellco Partnership DBA Verizon Wireless
301-759 Cumberland, MD Landline Verizon Maryland
301-764 Waldorf, MD Landline Verizon Maryland
301-766 Hagerstown, MD Landline Verizon Maryland
301-769 Avenue, MD Landline Verizon Maryland
301-774 Ashton, MD Landline Verizon Maryland
301-776 Laurel, MD Landline Verizon Maryland
301-777 Cumberland, MD Landline Verizon Maryland
301-781 Frostburg, MD Landline New Frontiers Telecommunications
301-782 Brandywine, MD Landline Verizon Maryland
301-783 Cumberland, MD Landline New Frontiers Telecommunications
301-784 Cumberland, MD Landline Verizon Maryland
301-788 Frederick, MD Cell Cellco Partnership DBA Verizon Wireless
301-790 Hagerstown, MD Landline Verizon Maryland
301-791 Hagerstown, MD Landline Verizon Maryland
301-797 Hagerstown, MD Landline Verizon Maryland
301-798 New Market, MD Landline Verizon Maryland
301-799 Keedysville, MD Landline Core Communications
301-800 Hagerstown, MD Cell Virginia PCS Alliance, L.c.
301-804 Sandy Spring, MD Landline Mcimetro Access Transmission Services LLC
301-810 Monrovia, MD Landline AT&T Local
301-815 Frederick, MD Landline Verizon Maryland
301-818 Waldorf, MD Landline Verizon Maryland
301-820 Gaithersburg, MD Landline AT&T Local
301-821 Laurel, MD Landline AT&T Local
301-824 Smithsburg, MD Landline Verizon Maryland
301-829 Mount Airy, MD Landline Verizon Maryland
301-831 Adamstown, MD Landline Verizon Maryland
301-834 Brunswick, MD Landline Verizon Maryland
301-835 Silver Spring, MD Landline Unknown
301-842 Clear Spring, MD Landline Verizon Maryland
301-845 Walkersville, MD Landline Verizon Maryland
301-846 Frederick, MD Landline Verizon Maryland
301-848 Waldorf, MD Cell Cellco Partnership DBA Verizon Wireless
301-849 Oakland, MD Landline New Frontiers Telecommunications
301-854 Columbia, MD Landline Verizon Maryland
301-857 Clear Spring, MD Landline Core Communications
301-859 Oxon Hill, MD Landline Level 3 Communications
301-861 Waldorf, MD Landline Level 3 Communications
301-865 New Market, MD Landline Verizon Maryland
301-869 Gaithersburg, MD Landline Verizon Maryland
301-872 Ridge, MD Landline Verizon Maryland
301-874 Adamstown, MD Landline Verizon Maryland
301-875 Laurel, MD Landline Cellco Partnership DBA Verizon Wireless
301-876 Cumberland, MD Landline Level 3 Communications
301-882 New Market, MD Landline Core Communications
301-884 Mechanicsville, MD Landline Verizon Maryland
301-885 Waldorf, MD Landline Verizon Maryland
301-895 Grantsville, MD Landline Verizon Maryland
301-898 Walkersville, MD Landline Verizon Maryland
301-904 Leonardtown, MD Cell Cellco Partnership DBA Verizon Wireless
301-914 Mc Henry, MD Landline Mountain Communications DBA Procom
301-916 Poolesville, MD Landline Verizon Maryland
301-926 Gaithersburg, MD Landline Verizon Maryland
301-932 La Plata, MD Landline Verizon Maryland
301-934 La Plata, MD Landline Verizon Maryland
301-940 Silver Spring, MD Cell Verizon Maryland
301-944 Gaithersburg, MD Landline Mcimetro Access Transmission Services LLC
301-947 Gaithersburg, MD Landline Verizon Maryland
301-956 Rockville, MD Landline Verizon Maryland
301-957 Laurel, MD Landline Mcimetro Access Transmission Services LLC
301-963 Gaithersburg, MD Landline Verizon Maryland
301-964 Myersville, MD Cell New Cingular Wireless PCS - DC
301-969 Brunswick, MD Landline Comcast Phone Of Northern Maryland
301-972 Gaithersburg, MD Landline Verizon Maryland
301-974 Laurel, MD Landline Starpower Communications
301-977 Gaithersburg, MD Landline Verizon Maryland
301-987 Gaithersburg, MD Landline Verizon Maryland
301-988 Hagerstown, MD Cell Uscoc Of Cumberland DBA United States Cel Md
301-990 Gaithersburg, MD Landline Verizon Maryland
301-991 Hagerstown, MD Cell Sprint Spectrum L.p.
301-992 Hagerstown, MD Cell Sprint Spectrum L.p.
301-997 Leonardtown, MD Landline Verizon Maryland
301-999 Silver Spring, MD Landline Unknown