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Area Codes > 301 > Central Office Codes

Exchange Rate Center State Operating Company
301-805 WSNG236Z14 MD VERIZON MARYLAND, INC.
301-806 WSHNGTNZN3 MD SPRINT SPECTRUM L.P.
301-807 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-808 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-809 WSNG236Z14 MD VERIZON MARYLAND, INC.
301-810 BUCKEYSTN MD AT&T LOCAL
301-811 MD
301-812 WSNG238Z15 MD VERIZON MARYLAND, INC.
301-813 WSHNGTNZN2 MD BALTIMORE-WASHINGTON TELEPHONE BWT
301-814 WSHNGTNZN2 MD NEW CINGULAR WIRELESS PCS, LLC - DC
301-815 FREDERICK MD VERIZON MARYLAND, INC.
301-816 WSNGTNZN11 MD VERIZON MARYLAND, INC.
301-817 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-818 WALDORF MD VERIZON MARYLAND, INC.
301-819 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-820 GAITHERSBG MD AT&T LOCAL
301-821 LAUREL236 MD AT&T LOCAL
301-822 WSNGTNZN11 MD AT&T LOCAL
301-823 WSNG236Z13 MD AT&T LOCAL
301-824 SMITHSBURG MD VERIZON MARYLAND, INC.
301-825 WSNGTNZN10 MD AT&T LOCAL
301-826 LXTNPKGRML MD VERIZON MARYLAND, INC.
301-827 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-828 WSHNGTNZN2 MD AT&T LOCAL
301-829 MOUNT AIRY MD VERIZON MARYLAND, INC.
301-830 WSHNGTNZN3 MD AT&T LOCAL
301-831 DAMASCS240 MD VERIZON MARYLAND, INC.
301-832 WSHNGTNZN4 MD AT&T LOCAL
301-833 WSNG236Z14 MD TELEPORT COMMUNICATIONS GROUP, INC. - DC
301-834 BRUNSWICK MD VERIZON MARYLAND, INC.
301-835 HAGERSTOWN MD VERIZON MARYLAND, INC.
301-836 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-837 WSNG236Z13 MD MCIMETRO, ATS, INC.
301-838 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-839 WSHNGTNZN6 MD VERIZON MARYLAND, INC.
301-840 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-841 WSHNGTNZN2 MD MCIMETRO, ATS, INC.
301-842 CLEAR SPG MD VERIZON MARYLAND, INC.
301-843 WSHNGTNZN6 MD VERIZON MARYLAND, INC.
301-844 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-845 WALKERSVL MD VERIZON MARYLAND, INC.
301-846 FREDERICK MD VERIZON MARYLAND, INC.
301-847 WSNGTNZN12 MD VERIZON MARYLAND, INC.
301-848 WALDORF MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-849 OAKLAND MD NEW FRONTIERS TELECOMMUNICATIONS, INC.
301-850 WSNG236Z14 MD LEVEL 3 COMMUNICATIONS, LLC - MD
301-851 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-852 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-853 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-854 ASHTON238 MD VERIZON MARYLAND, INC.
301-855 WSNG238Z15 MD VERIZON MARYLAND, INC.
301-856 WSNGTNZN16 MD VERIZON MARYLAND, INC.
301-857 CLEAR SPG MD CORE COMMUNICATIONS, INC. - MD
301-858 WSNG238Z14 MD VERIZON MARYLAND, INC.
301-859 OAKLAND MD LEVEL 3 COMMUNICATIONS, LLC - MD
301-860 WSNG236Z14 MD VERIZON MARYLAND, INC.
301-861 WALDORF MD LEVEL 3 COMMUNICATIONS, LLC - MD
301-862 LXTNPKGRML MD VERIZON MARYLAND, INC.
301-863 LXTNPKGRML MD VERIZON MARYLAND, INC.
301-864 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-865 NEW MARKET MD VERIZON MARYLAND, INC.
301-866 LXTNPKGRML MD VERIZON MARYLAND, INC.
301-867 WSNG236Z14 MD MCIMETRO, ATS, INC.
301-868 WSNGTNZN16 MD VERIZON MARYLAND, INC.
301-869 GAITHERSBG MD VERIZON MARYLAND, INC.
301-870 WSHNGTNZN6 MD VERIZON MARYLAND, INC.
301-871 WSNGTNZN11 MD VERIZON MARYLAND, INC.
301-872 RIDGE MD VERIZON MARYLAND, INC.
301-873 WSHNGTNZN3 MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD
301-874 BUCKEYSTN MD VERIZON MARYLAND, INC.
301-875 LAUREL236 MD NATIONSLINE, INC.-MD
301-876 CUMBERLAND MD LEVEL 3 COMMUNICATIONS, LLC - MD
301-877 WSNGTNZN16 MD VERIZON MARYLAND, INC.
301-878 MD VERIZON MARYLAND, INC.
301-879 WSNGTNZN12 MD VERIZON MARYLAND, INC.
301-880 LXTNPKGRML MD LEVEL 3 COMMUNICATIONS, LLC - MD
301-881 WSNGTNZN11 MD VERIZON MARYLAND, INC.
301-882 NEW MARKET MD CORE COMMUNICATIONS, INC. - MD
301-883 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-884 MECHANCSVL MD VERIZON MARYLAND, INC.
301-885 WALDORF MD VERIZON MARYLAND, INC.
301-886 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-887 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-888 WSNGTNZN16 MD VERIZON MARYLAND, INC.
301-889 WSNG238Z14 MD VERIZON MARYLAND, INC.
301-890 WSNGTNZN12 MD VERIZON MARYLAND, INC.
301-891 WSHNGTNZN3 MD VERIZON MARYLAND, INC.
301-892 WSHNGTNZN4 MD VERIZON MARYLAND, INC.
301-893 WSHNGTNZN6 MD VERIZON MARYLAND, INC.
301-894 WSHNGTNZN6 MD VERIZON MARYLAND, INC.
301-895 GRANTSVL MD VERIZON MARYLAND, INC.
301-896 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-897 WSHNGTNZN2 MD VERIZON MARYLAND, INC.
301-898 FREDERICK MD VERIZON MARYLAND, INC.
301-899 WSHNGTNZN5 MD VERIZON MARYLAND, INC.
301-900 MD
301-901 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-902 WSNG236Z13 MD VERIZON MARYLAND, INC.
301-903 WSNGTNZN10 MD VERIZON MARYLAND, INC.
301-904 LEONARDTN MD CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD