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Area Codes > 301 > Central Office Codes

Exchange Rate Center State Operating Company
301-604 LAUREL236 MD VERIZON MARYLAND, INC.
301-605 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-606 FREDERICK MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-607 DAMASCS240 MD VERIZON MARYLAND, INC.
301-608 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-609 WALDORF MD VERIZON MARYLAND, INC.
301-610 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-611 MD
301-612 ASHTON236 MD ARCH WIRELESS HOLDINGS, INC.
301-613 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
301-614 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-615 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-616 OAKLAND MD USCOC OF CUMBERLAND, INC. DBA UNITED STATES CEL MD
301-617 LAUREL236 MD VERIZON MARYLAND, INC.
301-618 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-619 FREDERICK MD VERIZON MARYLAND, INC.
301-620 FREDERICK MD VERIZON MARYLAND, INC.
301-621 WSNG238Z14 MD VERIZON MARYLAND, INC.
301-622 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-623 WSNG236Z13 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-624 FREDERICK MD VERIZON MARYLAND, INC.
301-625 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-626 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-627 WSNG236Z15 MD VERIZON MARYLAND, INC.
301-628 WSHNGTNZN3 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-629 WSNG238Z14 MD VERIZON MARYLAND, INC.
301-630 WSHNGTNZN6 MD VERIZON MARYLAND, INC.
301-631 FREDERICK MD VERIZON MARYLAND, INC.
301-632 WALDORF MD VERIZON MARYLAND, INC.
301-633 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-634 WSHNGTNZN2 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-635 MYERSVILLE MD NEW FRONTIERS TELECOMMUNICATIONS, INC.
301-636 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-637 WSNGTNZN10 MD LEVEL 3 COMMUNICATIONS, LLC - MD
301-638 WALDORF MD VERIZON MARYLAND, INC.
301-639 FREDERICK MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-640 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-641 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-642 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-643 WALDORF MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-644 FREDERICK MD VERIZON MARYLAND, INC.
301-645 WALDORF MD VERIZON MARYLAND, INC.
301-646 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-647 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-648 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-649 WSNGTNZN11 MD VERIZON MARYLAND, INC.
301-650 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-651 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-652 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-653 WALDORF MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-654 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-655 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-656 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-657 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-658 ASHTON236 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-659 WALDORF MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-660 KEEDYSVL MD DOBSON CELLULAR SYSTEMS, INC.
301-661 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-662 FREDERICK MD VERIZON MARYLAND, INC.
301-663 FREDERICK MD VERIZON MARYLAND, INC.
301-664 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-665 HAGERSTOWN MD VERIZON MARYLAND, INC.
301-666 WSNG236Z14 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-667 MYERSVILLE MD DOBSON CELLULAR SYSTEMS, INC.
301-668 FREDERICK MD VERIZON MARYLAND, INC.
301-669 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-670 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-671 HAGERSTOWN MD NEW FRONTIERS TELECOMMUNICATIONS, INC.
301-672 LXTNPKGRML MD NEXTEL COMMUNICATIONS, INC.
301-673 FREDERICK MD NEW FRONTIERS TELECOMMUNICATIONS, INC.
301-674 WSHNGTNZN2 MD NEXTEL COMMUNICATIONS, INC.
301-675 WSHNGTNZN3 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
301-676 FREDERICK MD DOBSON CELLULAR SYSTEMS, INC.
301-677 WSNG236Z14 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-678 HANCOCK MD VERIZON MARYLAND, INC.
301-679 WSNGTNZN12 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-680 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-681 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-682 FREDERICK MD VERIZON MARYLAND, INC.
301-683 WSHNGTNZN4 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-684 INDIANHEAD MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-685 DAMASCS236 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-686 WSHNGTNZN6 MD VERIZON MARYLAND, INC.
301-687 FROSTBURG MD VERIZON MARYLAND, INC.
301-688 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-689 FROSTBURG MD VERIZON MARYLAND, INC.
301-690 LEONARDTN MD IDT AMERICA, CORP. - MD
301-691 POOLESVL MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-692 WSNGTNZN11 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-693 FREDERICK MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
301-694 FREDERICK MD VERIZON MARYLAND, INC.
301-695 FREDERICK MD VERIZON MARYLAND, INC.
301-696 FREDERICK MD VERIZON MARYLAND, INC.
301-697 CUMBERLAND MD DOBSON CELLULAR SYSTEMS, INC.
301-698 FREDERICK MD VERIZON MARYLAND, INC.
301-699 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-700 MD
301-701 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-702 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-703 MOUNT AIRY MD LEVEL 3 COMMUNICATIONS, LLC - MD