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: 618

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
903-618 A Owentown TX LGVWTXBA47Z  6529 T-MOBILE USA, INC. 554      
903-618 0 Owentown TX   6529 T-MOBILE USA, INC. 554      
903-618 1 Owentown TX   6529 T-MOBILE USA, INC. 554      
903-618 2 Owentown TX   903C ONVOY, LLC - TX 554   2020-08-28   
903-618 3 Owentown TX   903C ONVOY, LLC - TX 554   2020-08-28   
903-618 4 Owentown TX   7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 554   2021-07-19   
903-618 5 Owentown TX   516C AT&T CORP. 554   2013-02-13   
903-618 6 Owentown TX   793K TWC IP ENABLED SERVICES, LLC 554   2024-10-04   
903-618 7 Owentown TX   624H ONVOY SPECTRUM, LLC 554   2021-06-28   
903-618 8 Owentown TX   903C ONVOY, LLC - TX 554   2021-02-26   
903-618 9 Owentown TX   6529 T-MOBILE USA, INC. 554      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.