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.

NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-755 A Laurel (Baltimore LATA) MD WHMRMDATPS0  107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238      
240-755 0 Laurel (Baltimore LATA) MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2006-02-26   
240-755 1 Laurel (Baltimore LATA) MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2007-08-03   
240-755 2 Laurel (Baltimore LATA) MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2007-11-04   
240-755 3 Laurel (Baltimore LATA) MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-01-12   
240-755 4 Laurel (Baltimore LATA) MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-04-13   
240-755 5 Laurel (Baltimore LATA) MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-04-21   
240-755 6 Laurel (Baltimore LATA) MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC DBA T-MOBILE USA 238   2008-06-16   
240-755 7 Laurel (Baltimore LATA) MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-31   
240-755 8 Laurel (Baltimore LATA) MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2011-05-01   
240-755 9 Laurel (Baltimore LATA) MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2011-10-31   

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.