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.

Sherwood Forest, MD

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-849 A PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
410-849 0 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-04-24   
410-849 1 BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2006-07-31   
410-849 2 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
410-849 3 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
410-849 4 CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238   2004-02-05   
410-849 5 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
410-849 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-06-15   
410-849 7 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-07-25   
410-849 8 PARLMDPADS0  9212 VERIZON MARYLAND, INC. 238      
410-849 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
410-881 A BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-881 0 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-05   
410-881 1   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
410-881 2 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-03-30   
410-881 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
410-881 4 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-04-28   
410-881 5 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-04-04   
410-881 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-05   
410-881 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-01-09   
410-881 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-10-17   
410-881 9 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
443-339 A BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-339 0 BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
443-339 1 BLTMMDCH14Z  2697 CTC COMMUNICATIONS CORP. - MD 238      
443-339 2 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2020-11-14   
443-339 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
443-339 4 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-05-22   
443-339 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-18   
443-339 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-03-18   
443-339 7 BLTMMDDN2MD  508J CENTURYLINK COMMUNICATIONS, LLC 238   2014-06-12   
443-339 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-27   
443-339 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2014-09-27   
443-598 A BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-598 2 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2012-09-06   
443-598 3 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2008-10-01   
443-598 4 BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-598 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-10-17   
443-598 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2013-09-08   
443-598 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2017-03-30   
443-598 8 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
443-598 9 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-05-04   
667-277 A BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
667-277 0   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-22   
667-277 1   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-22   
667-277 2 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-277 3   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-10-23   
667-277 4   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-22   
667-277 5 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-277 6 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-277 7 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-277 8 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-277 9 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
667-363 A BLTMMDCH42Z  876D ONVOY, LLC - MD 238      
667-363 0 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2023-07-23   
667-363 1 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-03-07   
667-363 2 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-03-07   
667-363 3 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2024-12-19   
667-363 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-12   
667-363 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-07-12   
667-363 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-05-22   
667-363 7 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2021-05-23   
667-363 8 BLTQMD01BMD  516J TON80 COMMUNICATIONS, LLC 238   2022-03-26   
667-363 9 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2024-11-20   

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.