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
240-974 4 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-02-04   
240-974 5 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-02-04   
240-974 6 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-02-04   
240-974 7 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-02-04   
240-974 8 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-02-04   
240-974 9 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-02-04   
240-987 A BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
240-987 0 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-05-22   
240-987 1 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-05-22   
240-987 2 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-05-22   
240-987 3 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-05-22   
240-987 4 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-05-20   
240-987 5 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-05-20   
240-987 6 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-05-20   
240-987 7 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-05-20   
240-987 8 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-05-22   
240-987 9 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-05-22   
240-992 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-992 0 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-08-06   
240-992 1 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-08-06   
240-992 2 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-08-06   
240-992 3 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-08-06   
240-992 4 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-08-06   
240-992 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2023-06-23   
240-992 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-06-19   
240-992 7 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-06-19   
240-992 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-06-19   
240-992 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-06-19   
240-994 A WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
301-201 A BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236      
301-201 0 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2023-09-21   
301-201 1 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-09-21   
301-201 2 BTVLMD18G00  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2023-09-21   
301-201 3 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-01-08   
301-201 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-01-08   
301-201 5 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-01-08   
301-201 6 BTVLMD12CMA  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 BTVLMD12CMA  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   829J PAETEC ITEL, LLC 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      
301-296 3 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 4 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 5 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 6 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2013-08-01   
301-296 7 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 8 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-296 9 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-299 A BTHSMDBDDS0  9212 VERIZON MARYLAND, INC. 236      
301-309 A RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-309 0 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-309 1 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-309 2 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-309 3 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-309 4 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-309 5 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-309 6 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      
301-309 7 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2021-08-20   
301-309 8 RKVLMDRVDS1  9212 VERIZON MARYLAND, INC. 236      

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

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.