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.

La Plata, MD

1 2 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
240-208 A   568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-349 A WASJDCDCDS0  6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 236      
240-349 0   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 236      
240-349 1   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 236      
240-349 2   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 236   2005-07-25   
240-349 3   4773 XO MARYLAND, LLC 236   2005-08-15   
240-349 4   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 236      
240-349 5   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-349 6   071F BANDWIDTH.COM CLEC, LLC - MD 236   2007-10-22   
240-349 7   912D BROADVOX-CLEC, LLC - MD 236   2012-10-06   
240-349 8   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236      
240-349 9   6050 GLOBAL CROSSING LOCAL SERVICES, INC.-MD 236      
240-352 A   568G PEERLESS NETWORK OF MARYLAND, LLC 236      
240-523 A WASHDCCZDS0  4773 XO MARYLAND, LLC 236      
240-523 0   4773 XO MARYLAND, LLC 236      
240-523 1   2589 US LEC OF MARYLAND, INC. 236   2004-02-05   
240-523 2   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2005-07-15   
240-523 3   071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-10-17   
240-523 4   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2004-03-02   
240-523 5   4773 XO MARYLAND, LLC 236   2005-08-15   
240-523 6   4773 XO MARYLAND, LLC 236   2005-08-15   
240-523 7   4773 XO MARYLAND, LLC 236   2005-08-15   
240-523 8   4773 XO MARYLAND, LLC 236   2005-08-15   
240-523 9   4773 XO MARYLAND, LLC 236      
240-622 A   2593 CORE COMMUNICATIONS, INC. - MD 236   2018-08-02   
240-622 0   2593 CORE COMMUNICATIONS, INC. - MD 236   2018-08-02   
240-622 1   2593 CORE COMMUNICATIONS, INC. - MD 236   2018-08-02   
240-622 2   2593 CORE COMMUNICATIONS, INC. - MD 236   2018-08-02   
240-622 4   2593 CORE COMMUNICATIONS, INC. - MD 236   2019-03-29   
240-622 6   2593 CORE COMMUNICATIONS, INC. - MD 236   2019-03-29   
240-622 7   2593 CORE COMMUNICATIONS, INC. - MD 236   2019-03-29   
240-776 A WASHDCRKDS2  8864 BROADWING COMMUNICATIONS. LLC - MD 236      
240-776 0   8864 BROADWING COMMUNICATIONS. LLC - MD 236      
240-776 1   8864 BROADWING COMMUNICATIONS. LLC - MD 236      
240-776 2   071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-22   
240-776 3   8864 BROADWING COMMUNICATIONS. LLC - MD 236      
240-776 4   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 236   2007-09-20   
240-776 5   071F BANDWIDTH.COM CLEC, LLC - MD 236   2011-08-15   
240-776 6   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236   2008-08-01   
240-776 7   8864 BROADWING COMMUNICATIONS. LLC - MD 236      
240-776 8   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2008-05-16   
240-776 9   8864 BROADWING COMMUNICATIONS. LLC - MD 236      
240-901 A   7575 CENTURYLINK COMMUNICATIONS LLC 236      
240-901 0   568G PEERLESS NETWORK OF MARYLAND, LLC 236   2014-10-11   
240-901 1   8697 BALTIMORE-WASHINGTON TELEPHONE (BWT) 236   2015-06-20   
240-901 2   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 236   2014-10-03   
240-901 3   876D ONVOY, LLC - MD 236   2016-03-14   
240-901 4   876D ONVOY, LLC - MD 236   2016-03-14   
240-901 5   073H TELNYX LLC 236   2017-04-27   
240-901 7   7575 CENTURYLINK COMMUNICATIONS LLC 236   2014-07-21   

1 2 >>

Last updated: Sat, 27 Jul 2019 10:59:49 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.