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: 312

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
631-312 A Patchogue NY HNTNNYSUDS2  7140 TC SYSTEMS, INC. - NY 132      
631-312 0 Patchogue NY GCPKNYAIGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 132   2003-11-01   
631-312 1 Patchogue NY GCPKNYAIGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 132   2003-03-04   
631-312 2 Patchogue NY GCPKNYAIGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 132   2003-03-04   
631-312 3 Patchogue NY GCPKNYAIGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 132   2003-03-04   
631-312 4 Patchogue NY GCPKNYAIGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 132   2003-03-04   
631-312 5 Patchogue NY GRCYNYDYDS0  7133 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 132   2003-06-09   
631-312 6 Patchogue NY GCPKNYAIGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 132   2003-09-07   
631-312 7 Patchogue NY GCPKNYAIGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 132   2003-09-07   
631-312 8 Patchogue NY SYOSNYGNCM1  6622 OMNIPOINT COMMUNICATIONS, INC. - NY 132   2007-03-10   
631-312 9 Patchogue NY HNTNNYSUDS2  7140 TC SYSTEMS, INC. - NY 132      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.