Local Calling Guide

Area code/prefix search

Search by area code/prefix (NPA/NXX) or OCN

  • 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.

Last updated: Sat, 24 Jan 2015 04:01:52 UTC

How to use this page

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

NXX: 237

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA Eff date Disc date Map
972-237 A Grand Prairie TX DLLSTXGPCG0 9533 SOUTHWESTERN BELL [link] 552 map

Sponsored by: Execulink Telecom