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: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
631-257 A Smithtown NY HCVLNYAHDS9  7126 CABLEVISION LIGHTPATH, INC. - NY 132      
631-257 0 Smithtown NY NYCMNYZRDBS  155E PEERLESS NETWORK OF NEW YORK, LLC - NY 132      
631-257 1 Smithtown NY NYCMNYZRDBS  155E PEERLESS NETWORK OF NEW YORK, LLC - NY 132      
631-257 2 Smithtown NY NYCMNYZRYMD  508J CENTURYLINK COMMUNICATIONS, LLC 132      
631-257 3 Smithtown NY NYCMNYBXDSL  384C ONVOY, LLC- NY 132      
631-257 4 Smithtown NY HCVLNYAHDS9  7126 CABLEVISION LIGHTPATH, INC. - NY 132      
631-257 5 Smithtown NY WHPLNYGRDS1  7126 CABLEVISION LIGHTPATH, INC. - NY 132      
631-257 6 Smithtown NY NYCMNY371MD  4152 PAETEC COMMUNICATIONS, INC. - NY 132      
631-257 7 Smithtown NY NYCMNYBXDSL  384C ONVOY, LLC- NY 132      
631-257 8 Smithtown NY   515J IP HORIZON LLC 132      
631-257 9 Smithtown NY   515J IP HORIZON LLC 132      

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.