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: 704 [Rate centres in NPA 704] [Dial plan for NPA 704]

NXX: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
704-257 A Denver NC CHRLNCTAX7X  2902 GLOBAL CROSSING LOCAL SERVICES, INC. - NC 422      
704-257 0 Denver NC CHRXNCRX0MD  4620 DELTACOM, INC. - NC 422      
704-257 1 Denver NC CHRLNCTAX7X  2902 GLOBAL CROSSING LOCAL SERVICES, INC. - NC 422      
704-257 2 Denver NC   145J TERRA NOVA TELECOM INC. 422      
704-257 3 Denver NC CHRLNCTAX7X  2902 GLOBAL CROSSING LOCAL SERVICES, INC. - NC 422      
704-257 4 Denver NC CHRLNCRL3MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 422      
704-257 5 Denver NC RCHLSCXBDS0  9412 SPRINGBOARD TELECOM, LLC - NC 422      
704-257 6 Denver NC CHRLNCRL3MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 422      
704-257 7 Denver NC CHRLNCRL3MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 422      
704-257 8 Denver NC CHRLNCRL3MD  3235 LEVEL 3 COMMUNICATIONS, LLC - NC 422      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.