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: 607 [Rate centres in NPA 607] [Dial plan for NPA 607]

NXX: 561

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
607-561 A Sidney NY SDNYNYXBRS0  0096 CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 138      
607-561 2 Sidney NY   0096 CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 138      
607-561 3 Sidney NY   0096 CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 138      
607-561 5 Sidney NY   0096 CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 138      
607-561 7 Sidney NY   0096 CITIZENS TELECOMM CO OF NY DBA FRONTIER COMM OF NY 138      
607-561 9 Sidney NY   793K TWC IP ENABLED SERVICES, LLC 138   2010-12-31   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.