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Place a vertical ad here.| Prefix | City | Company | Line type | Open |
|---|---|---|---|---|
| 874 | Baltimore | Mcimetro Access Transmission Services Llc | Landline | View |
| 875 | Westminster | Verizon Maryland Inc. | Landline | View |
| 877 | Bel Air | Verizon Maryland Inc. | Landline | View |
| 878 | Baltimore | Mcimetro Access Transmission Services Llc | Landline | View |
| 880 | Laurel | Verizon Maryland Inc. | Landline | View |
| 881 | Baltimore | Mcimetro Access Transmission Services Llc | Landline | View |
| 884 | Columbia | Verizon Maryland Inc. | Landline | View |
| 885 | Chesapeake City | Verizon Maryland Inc. | Landline | View |
| 887 | Towson | Verizon Maryland Inc. | Landline | View |
| 888 | Laurel | Verizon Maryland Inc. | Landline | View |
| 889 | Baltimore | Verizon Maryland Inc. | Landline | View |
| 890 | Hanover | Usa Mobility Wireless Inc. | Wireless | View |
| 891 | Baltimore | Mci Worldcom Communications Inc. - Md | Landline | View |
| 892 | Linthicum Heights | Verizon Maryland Inc. | Landline | View |
| 893 | Bel Air | Verizon Maryland Inc. | Landline | View |
| 894 | Hanover | Usa Mobility Wireless Inc. | Wireless | View |
| 895 | Baltimore | Verizon Maryland Inc. | Landline | View |
| 897 | Annapolis | Verizon Maryland Inc. | Landline | View |
| 898 | Beltsville | Verizon Maryland Inc. | Landline | View |
| 899 | Hanover | Usa Mobility Wireless Inc. | Wireless | View |
| 900 | Baltimore | Ctc Communications Corp. - Md | Landline | View |
| 901 | Cambridge | Verizon Maryland Inc. | Landline | View |
| 902 | Owings Mills | Verizon Maryland Inc. | Landline | View |
| 903 | Hanover | Sprint Spectrum L.p. | Wireless | View |
| 904 | Baltimore | Mcimetro Access Transmission Services Llc | Landline | View |
| 905 | Hanover | Sprint Spectrum L.p. | Wireless | View |
| 906 | Baltimore | Verizon Maryland Inc. | Landline | View |
| 907 | Baltimore | Mcimetro Access Transmission Services Llc | Landline | View |
| 908 | Hanover | Sprint Spectrum L.p. | Wireless | View |
| 909 | Hanover | Usa Mobility Wireless Inc. | Wireless | View |
| 910 | Baltimore | Mcimetro Access Transmission Services Llc | Landline | View |
| 912 | Salisbury | Cavalier Telephone Llc (mid-atlantic) - Md | Landline | View |
| 913 | Windsor Mill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | View |
| 914 | Bel Air | Cavalier Telephone Llc (mid-atlantic) - Md | Landline | View |
| 915 | Baltimore | Baltimore-washington Telephone Bwt | Landline | View |
| 916 | Windsor Mill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | View |
| 917 | Columbia | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 918 | Essex | Verizon Maryland Inc. | Landline | View |
| 919 | Baltimore | Mcimetro Access Transmission Services Llc | Landline | View |
| 920 | Columbia | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 921 | Baltimore | Tw Telecom Of Maryland Llc - Md | Landline | View |
| 924 | Salisbury | Cellco Partnership Dba Verizon Wireless - Md | Wireless | View |
| 925 | Windsor Mill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | View |
| 926 | Columbia | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 927 | Laurel | Tw Telecom Of Maryland Llc - Md | Landline | View |
| 928 | Millington | Verizon Maryland Inc. | Landline | View |
| 929 | Baltimore | Bandwidth.com Clec Llc - Md | Landline | View |
| 930 | Laurel | Redi-call Communications Co | Landline | View |
| 931 | White Marsh | Verizon Maryland Inc. | Landline | View |
| 932 | Hanover | Usa Mobility Wireless Inc. | Wireless | View |
| 933 | White Marsh | Verizon Maryland Inc. | Landline | View |
| 934 | Columbia | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 935 | Windsor Mill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | View |
| 937 | Windsor Mill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | View |
| 938 | Towson | Verizon Maryland Inc. | Landline | View |
| 940 | Hanover | Atx Telecommunications Services Ltd | Landline | View |
| 941 | Baltimore | Verizon Maryland Inc. | Landline | View |
| 942 | Havre de Grace | Verizon Maryland Inc. | Landline | View |
| 944 | Gwynn Oak | Verizon Maryland Inc. | Landline | View |
| 945 | Baltimore | Verizon Maryland Inc. | Landline | View |
| 946 | Annapolis | Verizon Maryland Inc. | Landline | View |
| 947 | Baltimore | Verizon Maryland Inc. | Landline | View |
| 948 | Columbia | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 949 | Baltimore | Mcimetro Access Transmission Services Llc | Landline | View |
| 951 | Baltimore | Teleport Communications America Llc - Md | Landline | View |
| 952 | Windsor Mill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | View |
| 953 | Columbia | Verizon Maryland Inc. | Landline | View |
| 955 | Baltimore | Verizon Maryland Inc. | Landline | View |
| 960 | Windsor Mill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | View |
| 961 | Hanover | Sprint Spectrum L.p. | Wireless | View |
| 962 | Baltimore | Verizon Maryland Inc. | Landline | View |
| 963 | Hanover | Sprint Spectrum L.p. | Wireless | View |
| 964 | Columbia | Verizon Maryland Inc. | Landline | View |
| 965 | Gwynn Oak | Verizon Maryland Inc. | Landline | View |
| 966 | Gwynn Oak | Verizon Maryland Inc. | Landline | View |
| 967 | Columbia | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 970 | Baltimore | Mcimetro Access Transmission Services Llc | Landline | View |
| 971 | Columbia | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 972 | Columbia | Teleport Communications America Llc - Md | Landline | View |
| 976 | Baltimore | Baltimore-washington Telephone Bwt | Landline | View |
| 977 | Hanover | Sprint Spectrum L.p. | Wireless | View |
| 978 | Columbia | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 979 | Columbia | New Cingular Wireless Pcs Llc - Dc | Wireless | View |
| 980 | Windsor Mill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | View |
| 981 | Linthicum Heights | Verizon Maryland Inc. | Landline | View |
| 982 | Hanover | Quantum Telecommunications Inc. - Md | Landline | View |
| 983 | Whiteford | Verizon Maryland Inc. | Landline | View |
| 984 | Hanover | Sprint Spectrum L.p. - Md | Wireless | View |
| 985 | Chevy Chase | Baltimore-washington Telephone Bwt | Landline | View |
| 986 | Baltimore | Verizon Maryland Inc. | Landline | View |
| 988 | Clarksville | Verizon Maryland Inc. | Landline | View |
| 989 | Baltimore | Verizon Maryland Inc. | Landline | View |
| 990 | Annapolis | Verizon Maryland Inc. | Landline | View |
| 991 | Windsor Mill | Cellco Partnership Dba Verizon Wireless - Md | Wireless | View |
| 993 | Linthicum Heights | Verizon Maryland Inc. | Landline | View |
| 994 | Baltimore | Verizon Maryland Inc. | Landline | View |
| 995 | Columbia | Verizon Maryland Inc. | Landline | View |
| 996 | Elkton | Verizon Maryland Inc. | Landline | View |
| 998 | Owings Mills | Verizon Maryland Inc. | Landline | View |
| 999 | Baltimore | Baltimore-washington Telephone Bwt | Landline | View |
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