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: 603

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
903-603 A Mabank TX ATHNTXXAAMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552      
903-603 0 Mabank TX ATHNTXXAAMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2006-01-20   
903-603 1 Mabank TX ATHNTXXAAMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2006-03-10   
903-603 2 Mabank TX ATHNTXXAAMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2006-07-13   
903-603 3 Mabank TX ATHNTXXAAMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2006-12-14   
903-603 4 Mabank TX ATHNTXXAAMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2007-01-30   
903-603 5 Mabank TX ATHNTXXAAMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2007-02-17   
903-603 6 Mabank TX ATHNTXXAAMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2008-04-02   
903-603 7 Mabank TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2008-05-21   
903-603 8 Mabank TX ATHNTXXAAMD  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2005-07-17   
903-603 9 Mabank TX DLLATX37DS6  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 552   2006-09-01   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.