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.

Worthington, MD

1 2 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
410-429 A RSTWMDRSDS0  9212 VERIZON MARYLAND, INC. 238      
410-429 0 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2008-12-11   
410-429 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-11   
410-429 2 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2016-04-11   
410-429 3 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-31   
410-429 4 RSTWMDRSDS0  9212 VERIZON MARYLAND, INC. 238      
410-429 5 RSTWMDRSDS0  9212 VERIZON MARYLAND, INC. 238      
410-429 6 BLTMMDCHXFX  318J COMCAST IP PHONE LLC 238   2006-05-05   
410-429 7 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-02-22   
410-429 8 BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
410-429 9 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-07-31   
443-218 A BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-218 0 BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-218 1 BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-218 2 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-03-05   
443-218 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-09-04   
443-218 4 BLTOMDXIDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC. - MD 238      
443-218 6 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2010-10-28   
443-218 7 BLTMMDSN6MD  6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2011-11-20   
443-218 8 BLTMMDSN5MD  4773 XO MARYLAND, LLC 238   2006-08-07   
443-218 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-04-30   
443-222 A BLTMMDSNDS5  4773 XO MARYLAND, LLC 238      
443-222 0 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-04-30   
443-222 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-04-30   
443-222 2 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-03   
443-222 3   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-222 4   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-222 5   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
443-222 6 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-222 7 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-222 8 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
443-222 9 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2019-02-19   
443-767 A HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-767 0 HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-767 1 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-06-11   
443-767 2 BLTMMD91DS1  2593 CORE COMMUNICATIONS, INC.- MD 238   2004-04-02   
443-767 3 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2020-06-11   
443-767 4 BLTMMDCH42Z  876D ONVOY, LLC - MD 238   2012-10-08   
443-767 5 BLTMMDCHXMX  506J TWILIO INTERNATIONAL INC 238   2020-12-26   
443-767 6 BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-29   
443-767 7 PIVLMDPKFMD  9170 BROADVIEW NETWORKS, INC. - MD 238   2008-09-08   
443-767 8 HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-767 9 HNVAMDBHAMD  3910 CAVALIER TELEPHONE MID-ATLANTIC, LLC - MD 238      
443-914 A BLTMMDFMDS0  7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
443-914 0 BLTMMDSN5MD  4773 XO MARYLAND, LLC 238   2002-11-25   
443-914 1 CLMAMDJTAMD  2589 US LEC OF MARYLAND, INC. 238   2004-01-10   
443-914 2 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2014-07-07   
443-914 3 BLTMMDCH45Z  071F BANDWIDTH.COM CLEC, LLC - MD 238   2015-07-06   
443-914 4 BLTOMDKHDS0  7228 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD 238   2017-06-05   
443-914 5 BLTMMDCH25Z  8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 238   2015-06-20   

1 2 >>

Last updated: Tue, 24 Jan 2023 03:01:57 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.