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: 540

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
585-540 A Rochester NY ROCHNYEI1MD  321J HD CARRIER LLC 974      
585-540 0 Rochester NY   6622 OMNIPOINT COMMUNICATIONS, INC. - NY 974   2021-06-18   
585-540 1 Rochester NY   384C ONVOY, LLC- NY 974   2020-10-03   
585-540 2 Rochester NY   384C ONVOY, LLC- NY 974   2020-10-03   
585-540 3 Rochester NY   384C ONVOY, LLC- NY 974   2020-10-03   
585-540 4 Rochester NY   384C ONVOY, LLC- NY 974   2020-10-03   
585-540 5 Rochester NY   384C ONVOY, LLC- NY 974   2020-10-03   
585-540 6 Rochester NY   6622 OMNIPOINT COMMUNICATIONS, INC. - NY 974   2021-09-06   
585-540 7 Rochester NY   6622 OMNIPOINT COMMUNICATIONS, INC. - NY 974   2021-09-06   
585-540 8 Rochester NY   321J HD CARRIER LLC 974   2020-09-14   
585-540 9 Rochester NY   321J HD CARRIER LLC 974   2020-09-14   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.