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: 971

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-971 A Frederick MD FRDRMDFRXKX  508J CENTURYLINK COMMUNICATIONS, LLC 240      
240-971 0 Frederick MD HGTWMD530MD  073H TELNYX LLC 240   2017-08-08   
240-971 1 Frederick MD FRDRMDFRIMD  551G NUSO, LLC 240   2018-10-14   
240-971 2 Frederick MD FRDRMDFRIMD  551G NUSO, LLC 240   2018-11-07   
240-971 3 Frederick MD FRDRMDFRIMD  551G NUSO, LLC 240   2018-11-07   
240-971 4 Frederick MD FRDRMDFRIMD  551G NUSO, LLC 240   2018-11-07   
240-971 5 Frederick MD FRDRMDFRIMD  551G NUSO, LLC 240   2018-11-07   
240-971 6 Frederick MD FRDRMDFR9MD  5562 METROPCS, INC. 240   2018-04-09   
240-971 7 Frederick MD FRDRMDFRXKX  508J CENTURYLINK COMMUNICATIONS, LLC 240   2016-10-01   
240-971 8 Frederick MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240   2018-02-05   
240-971 9 Frederick MD FRDRMDFRKMD  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 240   2018-02-05   

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.