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.

Armiger-Gibson Island, MD

1 2 3 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-255 A ARMGMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-317 A BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-317 0 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-01-07   
410-317 1 BLTMMDCH08Z  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 238   2004-02-14   
410-317 2   2593 CORE COMMUNICATIONS, INC.- MD 238   2004-03-29   
410-317 3 BLTMMDCHXUX  624H ONVOY SPECTRUM, LLC 238   2022-01-07   
410-317 4 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-317 5 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2007-09-20   
410-317 6 PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238   2010-01-07   
410-317 7   2593 CORE COMMUNICATIONS, INC.- MD 238   2008-04-30   
410-317 8 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-05-08   
410-317 9 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238      
410-360 A ARMGMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-437 A ARMGMDARDS0  9212 VERIZON MARYLAND, INC. 238      
410-439 A ARMGMDARDS0  9212 VERIZON MARYLAND, INC. 238      
443-305 A BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-305 0 BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-305 1 BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-305 2 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2005-03-10   
443-305 3 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-05-08   
443-305 4 BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-305 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-03-04   
443-305 6 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2008-05-16   
443-305 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2022-09-16   
443-305 8 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-06-26   
443-305 9 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
443-637 A BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-637 0 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-637 1 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2005-01-10   
443-637 2 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-11-29   
443-637 3 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-637 4 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2003-02-20   
443-637 5 BLTMMDCHXNX  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 238      
443-637 6 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-07   
443-637 7 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2012-10-11   
443-637 8 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2012-10-11   
443-637 9 BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238   2012-10-11   
443-702 A HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-702 0 HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-702 1 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2022-07-25   
443-702 2 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2014-10-15   
443-702 3 HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-702 4 CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238   2007-06-15   
443-702 5 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-09-23   
443-702 6 CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2014-02-10   
443-702 7 BLTMMDCHXFX  318J COMCAST IP PHONE, LLC 238   2008-09-25   
443-702 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2021-09-23   
443-702 9 BLTMMDCHXHX  515J IP HORIZON LLC 238   2021-08-15   
443-770 A ARMGMDARDS0  9212 VERIZON MARYLAND, INC. 238      
443-770 0 ARMGMDARDS0  9212 VERIZON MARYLAND, INC. 238      

1 2 3 >>

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.