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Area Codes > 240 > Central Office Codes

Exchange Rate Center State Operating Company
240-571 MD
240-573 WSNG236Z15 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-575 FREDERICK MD LEVEL 3 COMMUNICATIONS, LLC - MD
240-577 LEONARDTN MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-580 CUMBERLAND MD NEXTEL COMMUNICATIONS, INC.
240-581 LAUREL236 MD PAETEC COMMUNICATIONS, INC. - DC
240-582 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
240-586 FREDERICK MD VERIZON MARYLAND, INC.
240-593 LAUREL238 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-595 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-597 GAITHERSBG MD GLOBAL NAPS SOUTH, INC. - MD
240-599 WSNGTNZN10 MD BROADWING COMMUNICATIONS. LLC - MD
240-601 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-602 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-603 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-604 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-605 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-606 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
240-607 WALDORF MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-611 MD
240-616 WSNG236Z13 MD MCI WORLDCOM COMMUNICATIONS, INC. - MD
240-619 WSHNGTNZN5 MD MCI WORLDCOM COMMUNICATIONS, INC. - MD
240-620 WSNGTNZN10 MD MCI WORLDCOM COMMUNICATIONS, INC. - MD
240-621 WSNGTNZN11 MD MCI WORLDCOM COMMUNICATIONS, INC. - MD
240-624 WSNG236Z13 MD VERIZON MARYLAND, INC.
240-625 HAGERSTOWN MD NEXTEL COMMUNICATIONS, INC.
240-626 FREDERICK MD SPRINT SPECTRUM L.P.
240-627 WSNGTNZN11 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-629 FREDERICK MD VERIZON MARYLAND, INC.
240-631 GAITHERSBG MD VERIZON MARYLAND, INC.
240-632 GAITHERSBG MD VERIZON MARYLAND, INC.
240-638 WSHNGTNZN3 MD BROADWING COMMUNICATIONS. LLC - MD
240-641 WSNGTNZN10 MD TIDALWAVE TELEPHONE INC.
240-642 WSNGTNZN10 MD TIDALWAVE TELEPHONE INC.
240-643 WSHNGTNZN3 MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC
240-644 WSHNGTNZN2 MD XO MARYLAND, LLC
240-645 WSHNGTNZN3 MD XO MARYLAND, LLC
240-646 LAUREL236 MD CAVALIER EAST LLC - MD
240-652 MECHANCSVL MD XO MARYLAND, LLC
240-654 GAITHERSBG MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-662 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
240-667 WSHNGTNZN4 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-668 DAMASCS236 MD STARPOWER COMMUNICATIONS, LLC - MD
240-669 WSNGTNZN11 MD SBC LONG DISTANCE, LLC DBA AT&T LONG DISTANCE - MD
240-671 WSHNGTNZN2 MD SBC LONG DISTANCE, LLC DBA AT&T LONG DISTANCE - MD
240-672 WSNGTNZN10 MD SBC LONG DISTANCE, LLC DBA AT&T LONG DISTANCE - MD
240-674 FREDERICK MD NEXTEL COMMUNICATIONS, INC.
240-675 MYERSVILLE MD DOBSON CELLULAR SYSTEMS, INC.
240-676 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-678 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-681 BRANDYWINE MD ATX TELECOMMUNICATIONS SERVICES, LTD
240-682 WALDORF MD STARPOWER COMMUNICATIONS, LLC - MD
240-683 GAITHERSBG MD VERIZON MARYLAND, INC.
240-684 WSNG236Z13 MD VERIZON MARYLAND, INC.
240-685 BRANDYWINE MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-686 GAITHERSBG MD VERIZON MARYLAND, INC.
240-687 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-688 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-691 WSHNGTNZN5 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-694 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
240-695 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
240-696 WSHNGTNZN4 MD LEVEL 3 COMMUNICATIONS, LLC - MD
240-699 BUCKEYSTN MD VERIZON MARYLAND, INC.
240-700 MD
240-703 MD
240-711 MD
240-715 WSNGTNZN10 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-718 LXTNPKGRML MD XO MARYLAND, LLC
240-720 GAITHERSBG MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-722 ASHTON236 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-723 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
240-724 WSHNGTNZN6 MD CAVALIER EAST LLC - MD
240-725 LXTNPKGRML MD VERIZON MARYLAND, INC.
240-727 CUMBERLAND MD DOBSON CELLULAR SYSTEMS, INC.
240-731 WSNGTNZN10 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-737 WSHNGTNZN4 MD CAVALIER EAST LLC - MD
240-743 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-744 WSHNGTNZN2 MD BROADWING COMMUNICATIONS. LLC - MD
240-745 DAMASCS236 MD XO MARYLAND, LLC
240-747 WSNGTNZN11 MD CAVALIER EAST LLC - MD
240-750 GAITHERSBG MD NEW CINGULAR WIRELESS PCS, LLC - DC
240-751 GAITHERSBG MD TELCOVE OPERATIONS, INC. - MD
240-752 WSHNGTNZN2 MD TELCOVE OPERATIONS, INC. - MD
240-753 WSNGTNZN10 MD TELCOVE OPERATIONS, INC. - MD
240-755 LAUREL238 MD COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD
240-757 WSNG236Z13 MD GLOBAL NAPS SOUTH, INC. - MD
240-764 WSHNGTNZN4 MD XO MARYLAND, LLC
240-765 WSHNGTNZN5 MD XO MARYLAND, LLC
240-766 WSHNGTNZN6 MD XO MARYLAND, LLC
240-767 WSHNGTNZN5 MD CAVALIER EAST LLC - MD
240-770 WSHNGTNZN4 MD SBC LONG DISTANCE, LLC DBA AT&T LONG DISTANCE - MD
240-773 WSNGTNZN10 MD VERIZON MARYLAND, INC.
240-776 LA PLATA MD BROADWING COMMUNICATIONS. LLC - MD
240-777 WSNGTNZN10 MD VERIZON MARYLAND, INC.
240-778 WSNGTNZN10 MD XO MARYLAND, LLC
240-779 ASHTON236 MD CAVALIER EAST LLC - MD
240-780 GAITHERSBG MD BROADWING COMMUNICATIONS. LLC - MD
240-782 DAMASCS236 MD GLOBAL CROSSING LOCAL SERVICES, INC.-MD
240-783 WSHNGTNZN2 MD MTE, INC. DBA MTE PAGING NETWORK
240-784 MYERSVILLE MD OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC