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 5, MD

<< 1 2 3 4 5 6 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-795 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2021-10-16   
240-830 A ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236      
240-830 0 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-02-22   
240-830 1 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-03-02   
240-830 2 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2015-12-25   
240-830 3 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-04-28   
240-830 4 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-04-28   
240-830 5 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-04-28   
240-830 6   515J IP HORIZON LLC 236   2016-05-31   
240-830 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-03-14   
240-830 8 VINNVACBDS0  876D ONVOY, LLC - MD 236   2016-03-14   
240-830 9   515J IP HORIZON LLC 236   2016-05-31   
240-838 A BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-838 0 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-838 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-838 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-03-26   
240-838 3 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2006-12-29   
240-838 4 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-838 5 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2006-12-29   
240-838 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-838 7 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2006-12-29   
240-838 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2007-08-03   
240-838 9 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
240-857 A LARLMDCC5MD  7591 LEVEL 3 TELECOM OF MARYLAND, LLC - MD 236      
240-882 A BTVLMD12CMA  5562 METROPCS, INC. 236      
240-882 0 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-882 1 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-882 2 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-882 3 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-882 4 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-882 5 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-882 6 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-882 7 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-882 8 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-882 9 BTVLMD12CMA  5562 METROPCS, INC. 236      
240-890 A WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236      
240-890 0 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2022-02-23   
240-890 1 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2022-04-25   
240-890 2 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-02-26   
240-890 3 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2022-04-25   
240-890 4 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-02-24   
240-890 5 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2022-07-28   
240-890 6 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2022-07-28   
240-890 7 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-08-21   
240-890 8 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2022-02-24   
240-890 9 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2022-08-21   
301-278 A WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-278 0 LARLMDLR3MD  2596 QUANTUM TELECOMMUNICATIONS, INC. - MD 236   2003-12-25   
301-278 1 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2013-06-04   
301-278 2 WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2014-05-01   
301-278 3   2593 CORE COMMUNICATIONS, INC.- MD 236   2004-03-26   
301-278 4 WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2021-12-09   
301-278 5 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2008-08-01   
301-278 6 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-09-19   
301-278 7 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2008-08-01   
301-278 8 WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-06-26   
301-278 9 WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-316 A TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-316 0 TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-316 1 TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-316 2 TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-316 3 TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-316 4 TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-316 5 TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-316 6 TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-316 7 TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-316 8 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2015-09-19   
301-316 9 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2015-03-31   
301-324 A CPHGMDCADS0  9212 VERIZON MARYLAND, INC. 236      
301-333 A CPHGMDCADS0  9212 VERIZON MARYLAND, INC. 236      
301-336 A CPHGMDCADS0  9212 VERIZON MARYLAND, INC. 236      
301-343 A BTVLMD12CMA  5562 METROPCS, INC. 236      
301-343 0 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-343 1 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-343 2 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-343 3 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-343 4 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-343 5 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-343 6 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-343 7 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-343 8 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-343 9 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-350 A CPHGMDCADS0  9212 VERIZON MARYLAND, INC. 236      
301-420 A STLDMDSLDS0  9212 VERIZON MARYLAND, INC. 236      
301-423 A TMHLMDTHDS0  9212 VERIZON MARYLAND, INC. 236      
301-433 A ALTWMDATRP0  9212 VERIZON MARYLAND, INC. 236      
301-433 0 ALTWMDATRP0  9212 VERIZON MARYLAND, INC. 236      
301-433 1 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-01-12   
301-433 2 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-06-16   
301-433 3 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-06-16   
301-433 4 WASLDCRGDS0  281E YMAX COMMUNICATIONS CORP. - MD 236   2008-10-10   
301-433 5 BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2008-04-13   
301-433 6   2593 CORE COMMUNICATIONS, INC.- MD 236   2019-04-29   
301-433 7 VINNVACBDS0  876D ONVOY, LLC - MD 236   2015-06-27   
301-433 8 ARTNVAARXDY  318J COMCAST IP PHONE, LLC 236   2015-08-17   
301-433 9 BTVLMD12CMA  5562 METROPCS, INC. 236   2019-11-29   
301-440 A BTVLMD12CMA  5562 METROPCS, INC. 236      
301-440 0 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-440 1 BTVLMD12CMA  5562 METROPCS, INC. 236      
301-440 2 BTVLMD12CMA  5562 METROPCS, INC. 236      

<< 1 2 3 4 5 6 >>

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.