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: 972 [Rate centres in NPA 972] [Dial plan for NPA 972]

NXX: 477

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-477 A Plano TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552      
972-477 1 Plano TX   6529 T-MOBILE USA, INC. 552   2025-05-16   
972-477 2 Plano TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2025-07-11   
972-477 3 Plano TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2025-07-11   
972-477 4 Plano TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2025-07-11   
972-477 5 Plano TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2025-07-11   
972-477 6 Plano TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2025-07-11   
972-477 7 Plano TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 552   2025-07-11   
972-477 8 Plano TX   732J NUSO, LLC 552   2025-05-09   
972-477 9 Plano TX   732J NUSO, LLC 552   2025-05-09   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.