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 6, MD

1 2 3 4 5 6 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
227-231 A   876D ONVOY, LLC - MD 236   2024-03-30   
227-231 0   876D ONVOY, LLC - MD 236   2024-03-30   
227-231 1   876D ONVOY, LLC - MD 236   2024-03-30   
227-231 2   876D ONVOY, LLC - MD 236   2024-03-30   
227-231 3   876D ONVOY, LLC - MD 236   2024-03-30   
240-253 A WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-253 0 WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-253 1 WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-253 2 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2006-03-03   
240-253 3 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-12-15   
240-253 4 WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-253 5 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2023-09-29   
240-253 6 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2013-04-22   
240-253 7 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-08-28   
240-253 8 WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-253 9 WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 236      
240-273 A MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-273 0 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-07-08   
240-273 1 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-11-24   
240-273 2 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-04-07   
240-273 3 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-273 4 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2013-04-22   
240-273 5 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2005-09-15   
240-273 6 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2006-07-02   
240-273 7 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2015-05-14   
240-273 8 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2003-05-09   
240-273 9 WASHDC12MMD  516J TON80 COMMUNICATIONS, LLC 236   2021-09-23   
240-289 A HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-289 0 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-289 1 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-289 2 MCLNVA23DS4  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2008-02-13   
240-289 3 BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-02-04   
240-289 4 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-289 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-06-11   
240-289 6 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-06-11   
240-289 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-06-11   
240-289 8 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-06-11   
240-289 9 HRNDVA13AMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 236      
240-414 A SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-414 0   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-06-26   
240-414 1   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-06-26   
240-414 2   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-06-26   
240-414 3   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-06-26   
240-414 4 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-04-30   
240-414 5 SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2020-08-26   
240-414 6 SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236   2020-04-15   
240-414 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2023-01-02   
240-414 8 VINNVACBDS0  876D ONVOY, LLC - MD 236   2020-06-11   
240-414 9 SLSPMD91DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-441 A BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      

1 2 3 4 5 6 >>

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.