Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Washington Zone 4, MD

<< 1 2 3 4 5 6 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-898 9 WASHDC12KMD  145J TERRA NOVA TELECOM INC. 236      
240-900 A VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-900 0 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-900 1 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-900 2 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-900 3 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-900 4 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-900 5 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-900 6 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-900 7 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-900 8 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-900 9 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-906 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-906 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-906 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-906 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-906 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-906 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-906 5 WASHDC126MD  964H BARR TELL USA, INC. 236      
240-906 6 WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
240-906 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-906 8 SLSPMD913MD  939H COMMIO, LLC 236      
240-906 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-927 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-927 0 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-927 1 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-927 2 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-927 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-927 4 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-927 5 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-927 6 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-927 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-927 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-927 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-940 A WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-940 0 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-940 1 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-940 2 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-940 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-940 4 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-940 5 WASHDC12NMD  490J DISH WIRELESS, LLC 236      
240-940 6 BTVLMD127MD  5562 METROPCS, INC. 236      
240-940 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-940 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-940 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-960 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-960 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-960 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-960 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-960 3 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-960 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-960 5 VINNVACBDS0  876D ONVOY, LLC - MD 236      
240-960 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-960 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-960 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-960 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-209 A HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-226 A LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-239 A HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-276 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-276 0 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-276 1 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-276 2 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-276 3 CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-276 4 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-276 5 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-276 6 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-276 7 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-276 8 CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-276 9 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-277 A HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-306 A LNHMMDLNDS0  9212 VERIZON MARYLAND, INC. 236      
301-314 A CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-322 A LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-341 A LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-361 A LARLMDCC5MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236      
301-364 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-364 0 VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-364 1 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-364 2 BTVLMD127MD  5562 METROPCS, INC. 236      
301-364 3 VINNVACBDS0  876D ONVOY, LLC - MD 236      
301-364 4 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-364 5 CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-364 6 BTVLMD127MD  5562 METROPCS, INC. 236      
301-364 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-364 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-364 9 SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
301-386 A LDVRMDLODS0  9212 VERIZON MARYLAND, INC. 236      
301-403 A HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-405 A CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
301-422 A HYVLMDRIDS0  9212 VERIZON MARYLAND, INC. 236      
301-429 A LNHMMDLNDS0  9212 VERIZON MARYLAND, INC. 236      
301-436 A HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-454 A HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-454 0 HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-454 1 HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-454 2 HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-454 3 HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-454 4 HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      
301-454 5 HYVLMDHYDS0  9212 VERIZON MARYLAND, INC. 236      

<< 1 2 3 4 5 6 >>

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.