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: 903 [Rate centres in NPA 903] [Dial plan for NPA 903]

NXX: 605

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
903-605 A Lone Star TX LGVWTXPLXRX  318C CEBRIDGE TELECOM TX , L.P. - TX 554      
903-605 0 Lone Star TX TXRKTXXAHMD  624H ONVOY SPECTRUM, LLC 554   2024-01-14   
903-605 1 Lone Star TX LGVWTXPLXEX  903C ONVOY, LLC - TX 554   2018-11-13   
903-605 2 Lone Star TX TXRKTXXAHMD  624H ONVOY SPECTRUM, LLC 554   2021-12-04   
903-605 3 Lone Star TX TXRKTXXAHMD  624H ONVOY SPECTRUM, LLC 554   2021-12-29   
903-605 4 Lone Star TX TXRKTXXAHMD  624H ONVOY SPECTRUM, LLC 554   2021-06-28   
903-605 5 Lone Star TX LGVWTXPLXRX  318C CEBRIDGE TELECOM TX , L.P. - TX 554      
903-605 6 Lone Star TX LGVWTXPLXEX  903C ONVOY, LLC - TX 554   2020-12-11   
903-605 7 Lone Star TX LGVWTXPLXEX  903C ONVOY, LLC - TX 554   2020-12-11   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.