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: 998

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
585-998 A Rochester NY   977K YORKSTREAM COMMUNICATIONS LLC 974   2025-05-23   
585-998 0 Rochester NY   977K YORKSTREAM COMMUNICATIONS LLC 974   2025-05-23   
585-998 1 Rochester NY   732J NUSO, LLC 974   2025-05-29   
585-998 2 Rochester NY   732J NUSO, LLC 974   2025-05-29   
585-998 3 Rochester NY   732J NUSO, LLC 974   2025-05-29   
585-998 8 Rochester NY   977K YORKSTREAM COMMUNICATIONS LLC 974   2025-05-23   
585-998 9 Rochester NY   977K YORKSTREAM COMMUNICATIONS LLC 974   2025-05-23   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.