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: 366

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
903-366 A Commerce TX DLLTTX01HMD  5562 METROPCS, INC. 552      
903-366 0 Commerce TX COPRTXAI1MD  4042 CUMBY TELEPHONE COOPERATIVE, INC. 552   2013-05-18   
903-366 1 Commerce TX DLLTTX01HMD  5562 METROPCS, INC. 552      
903-366 2 Commerce TX DLLTTX01HMD  5562 METROPCS, INC. 552      
903-366 3 Commerce TX DLLTTX01HMD  5562 METROPCS, INC. 552      
903-366 4 Commerce TX DLLSTX23X9X  135H PEOPLES COMMUNICATION, INC. -TX 552   2014-01-05   
903-366 5 Commerce TX FTWQTXFH0MD  508J CENTURYLINK COMMUNICATIONS, LLC 552   2014-05-14   
903-366 6 Commerce TX DLLTTX01HMD  5562 METROPCS, INC. 552      
903-366 7 Commerce TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2012-06-02   
903-366 9 Commerce TX DLLTTXID1MD  6529 T-MOBILE USA, INC. 552      

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.