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: Fri, 17 May 2013 01:26:12 UTC

How to use this page

NPA: 213 [Rate centres in NPA 213] [Dial plan for NPA 213]

NXX: 637

NPA-NXX-X Rate Centre Region Switch OCN LATA Eff date Disc date Map
213-637 Los Angeles: DA 10 CA LSANCA11DS1 9740 PACIFIC BELL [link] 730 map


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