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: 315 [Rate centres in NPA 315] [Dial plan for NPA 315]

NXX: 231

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
315-231 A Oneida NY SYRCNYSWDS0  7140 TC SYSTEMS, INC. - NY 136      
315-231 0 Oneida NY   073H TELNYX LLC 136   2021-01-31   
315-231 1 Oneida NY   5562 METROPCS, INC. 136   2017-02-19   
315-231 2 Oneida NY   7140 TC SYSTEMS, INC. - NY 136      
315-231 3 Oneida NY   384C ONVOY, LLC- NY 136   2024-10-04   
315-231 4 Oneida NY   8249 RINGSQUARED TELECOM LLC 136   2007-11-25   
315-231 5 Oneida NY   7133 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY 136   2008-10-01   
315-231 6 Oneida NY   4006 LEVEL 3 COMMUNICATIONS, LLC - NY 136   2008-09-16   
315-231 7 Oneida NY   5562 METROPCS, INC. 136   2020-12-27   
315-231 8 Oneida NY   384C ONVOY, LLC- NY 136   2021-03-21   
315-231 9 Oneida NY   384C ONVOY, LLC- NY 136   2021-03-21   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.