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: 631 [Rate centres in NPA 631] [Dial plan for NPA 631]

NXX: 578

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
631-578 A Yaphank NY WBYNNYAKBMD  6664 SPRINT SPECTRUM L.P. 132      
631-578 0 Yaphank NY SYOSNYGNCM1  6622 OMNIPOINT COMMUNICATIONS, INC. - NY 132   2008-05-02   
631-578 1 Yaphank NY GRCYNYGCX0Y  3864 CTC COMMUNICATIONS CORP. - NY 132   2008-03-10   
631-578 2 Yaphank NY SYOSNYGNCM1  6622 OMNIPOINT COMMUNICATIONS, INC. - NY 132   2008-05-02   
631-578 3 Yaphank NY WBYNNYAKBMD  6664 SPRINT SPECTRUM L.P. 132   2009-02-16   
631-578 4 Yaphank NY WBYNNYAKBMD  6664 SPRINT SPECTRUM L.P. 132   2007-11-08   
631-578 5 Yaphank NY WBYNNYAKBMD  6664 SPRINT SPECTRUM L.P. 132   2007-11-08   
631-578 6 Yaphank NY WBYNNYAKBMD  6664 SPRINT SPECTRUM L.P. 132   2007-11-08   
631-578 7 Yaphank NY WBYNNYAKBMD  6664 SPRINT SPECTRUM L.P. 132   2007-11-08   
631-578 8 Yaphank NY WBYNNYAKBMD  6664 SPRINT SPECTRUM L.P. 132   2007-06-10   
631-578 9 Yaphank NY WBYNNYAKBMD  6664 SPRINT SPECTRUM L.P. 132   2007-06-10   

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.