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 11 12 13 14 15 16 17 18 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
301-201 2 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-09-21   
301-201 3 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-01-08   
301-201 4 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-01-08   
301-201 5 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-01-08   
301-201 6 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-01-08   
301-201 7 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-01-09   
301-201 8 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-01-07   
301-201 9 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-01-07   
301-212 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-212 0 BTVLMD127MD  5562 METROPCS, INC. 236   2013-06-16   
301-212 1 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-212 2 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-212 3 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-212 4 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-212 5 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-212 6 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-212 7 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-212 8 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-212 9 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-217 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-240 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 0 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 1 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 2 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 3 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-240 4 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 5 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 6 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 7 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 8 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-240 9 GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-251 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-258 A GTBGMDGBPS0  9212 VERIZON MARYLAND, INC. 236      
301-279 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-284 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 0 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2014-05-30   
301-284 1 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 2 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 3 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-01-29   
301-284 4 HRNDVACKBMD  5978 BROADVIEW NETWORKS OF VIRGINIA, INC. - VA 236   2013-03-12   
301-284 5 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 6 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 7 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 8 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2004-11-21   
301-284 9 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-294 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-296 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 0 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 1 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 2 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 >>

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.