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: 250

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
607-250 A Cortland NY SYRCNYSWDS0  7140 TC SYSTEMS, INC. - NY 136      
607-250 0 Cortland NY   145J TERRA NOVA TELECOM INC. 136   2022-11-02   
607-250 1 Cortland NY SYRCNYSUX1Y  384C ONVOY, LLC- NY 136   2017-01-08   
607-250 2 Cortland NY SYRCNYSUX1Y  384C ONVOY, LLC- NY 136   2023-08-09   
607-250 3 Cortland NY SYRCNYSUX1Y  384C ONVOY, LLC- NY 136   2023-08-09   
607-250 4 Cortland NY SYRCNYSUX1Y  384C ONVOY, LLC- NY 136   2023-08-09   
607-250 5 Cortland NY SYRCNYSUX1Y  384C ONVOY, LLC- NY 136   2023-08-09   
607-250 6 Cortland NY SYRCNYSUX1Y  384C ONVOY, LLC- NY 136   2023-08-09   
607-250 7 Cortland NY   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 136   2025-03-14   
607-250 8 Cortland NY SYRCNYSWDS0  7140 TC SYSTEMS, INC. - NY 136      
607-250 9 Cortland NY   793K TWC IP ENABLED SERVICES, LLC 136   2020-12-13   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.