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: 610

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
631-610 A Eastport NY NYCMNY83DSZ  4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132      
631-610 1 Eastport NY   4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132      
631-610 2 Eastport NY   4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132      
631-610 3 Eastport NY   145J TERRA NOVA TELECOM INC. 132   2023-06-22   
631-610 5 Eastport NY   4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132      
631-610 6 Eastport NY   624H ONVOY SPECTRUM, LLC 132   2021-04-17   
631-610 7 Eastport NY   624H ONVOY SPECTRUM, LLC 132   2021-11-21   
631-610 8 Eastport NY   4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132      
631-610 9 Eastport NY   4006 LEVEL 3 COMMUNICATIONS, LLC - NY 132      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.