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: 646 [Rate centres in NPA 646] [Dial plan for NPA 646]

NXX: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
646-257 A New York City Zone 01 NY NYCMNY83DSZ  4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132      
646-257 0 New York City Zone 01 NY NYCMNYBWCMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 132   2005-03-04   
646-257 1 New York City Zone 01 NY NYCMNYAACMM  6622 OMNIPOINT COMMUNICATIONS, INC. - NY 132   2004-06-21   
646-257 2 New York City Zone 01 NY NYCMNY83DSZ  4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132   2005-03-04   
646-257 3 New York City Zone 01 NY NYCMNY83DSZ  4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132   2005-03-04   
646-257 4 New York City Zone 01 NY NYCMNY83DSZ  4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132   2005-03-04   
646-257 5 New York City Zone 01 NY NYCMNY83DSZ  4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132   2005-03-04   
646-257 6 New York City Zone 01 NY NYCMNYAACMM  5562 METROPCS, INC. 132   2005-03-03   
646-257 7 New York City Zone 01 NY NYCMNYAACMM  5562 METROPCS, INC. 132   2005-03-03   
646-257 8 New York City Zone 01 NY NYCMNYAACMM  5562 METROPCS, INC. 132   2005-03-03   
646-257 9 New York City Zone 01 NY NYCMNYBWCMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 132   2005-03-04   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.