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 10, MD

<< 1 2 3 4 5 6 7 8 9 10 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-205 8 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-205 9 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-238 A CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-268 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-268 0 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-268 1 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-268 2 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-268 3 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-268 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-268 5 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-268 6 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-268 7 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-268 8 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-268 9 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-276 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-276 0 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-276 1 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-276 2 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-276 3 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-276 4 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-276 5 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-276 6 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-276 7 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-276 8 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-276 9 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-314 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-314 0 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-314 1 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-314 2 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-314 3 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-314 4 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-314 5 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-314 6 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-314 7 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-314 8 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-314 9 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-328 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-328 0 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-328 1 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
240-328 2 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-328 3 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-328 4 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-328 5 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-328 6 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
240-328 7 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-328 8 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-328 9 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-386 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-386 0 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-386 1 CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-386 2 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-386 3 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-386 4 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-386 5 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-386 6 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
240-386 7 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-386 8 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
240-386 9 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-399 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-401 A BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-403 A HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-403 0 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-403 1 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-403 2 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-403 3 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-403 4 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-403 5 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-403 6 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-403 7 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
240-403 8 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-403 9 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-406 A BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-406 0 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-406 1 HRNDVACKBMD  5978 BROADVIEW NETWORKS OF VIRGINIA, INC. - VA 236      
240-406 2 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-406 3 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-406 4 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-406 5 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-406 6 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-406 7 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-406 8 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-406 9 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-408 A BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-408 0 BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-408 1 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-408 2 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-408 3 CHCHMDBE6MD  4716 PAETEC COMMUNICATIONS, INC. - MD 236      
240-408 4 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-408 5 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
240-408 6 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-408 7 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
240-408 8 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-408 9 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-421 A BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-421 0 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-421 1 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-421 2 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-421 3 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-421 4 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-421 5 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      

<< 1 2 3 4 5 6 7 8 9 10 >>

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.