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.

Switch: ROCHNYEI6MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
585-578 A Castile NY 939H COMMIO, LLC 974      
585-675 A West Webster NY 939H COMMIO, LLC 974      
585-679 A Nunda NY 939H COMMIO, LLC 974      
585-712 A Caledonia NY 939H COMMIO, LLC 974   2024-04-01   
585-715 A Leicester NY 939H COMMIO, LLC 974   2024-04-01   
585-867 A Rochester NY 939H COMMIO, LLC 974      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.