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: 585 [Rate centres in NPA 585] [Dial plan for NPA 585]

NXX: 578

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
585-578 A Castile NY ROCHNYEI6MD  939H COMMIO, LLC 974      
585-578 0 Castile NY ROCHNYEI6MD  939H COMMIO, LLC 974   2021-11-26   
585-578 1 Castile NY ROCHNYXAXLX  624H ONVOY SPECTRUM, LLC 974   2025-01-16   
585-578 6 Castile NY BFLONYFRXBY  818H PEERING HUB, INC. - NY 974   2023-12-22   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.