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, 26 Jul 2014 03:21:21 UTC

How to use this page

NPA: 530 [Rate centres in NPA 530] [Dial plan for NPA 530]

NXX: 550

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA Eff date Disc date Map
530-550 A Truckee CA TRUCCA11DS0 9740 PACIFIC BELL [link] 726 map
530-550 0 Truckee CA 9740 PACIFIC BELL [link] 726
530-550 1 Truckee CA 9740 PACIFIC BELL [link] 726
530-550 2 Truckee CA 9740 PACIFIC BELL [link] 726
530-550 3 Truckee CA 9740 PACIFIC BELL [link] 726
530-550 4 Truckee CA 9262 UTILITY TELEPHONE, INC. - CA [link] 726 2005-04-26
530-550 5 Truckee CA 9740 PACIFIC BELL [link] 726
530-550 6 Truckee CA 9740 PACIFIC BELL [link] 726 2008-07-01
530-550 7 Truckee CA 9740 PACIFIC BELL [link] 726
530-550 8 Truckee CA 9740 PACIFIC BELL [link] 726
530-550 9 Truckee CA 9740 PACIFIC BELL [link] 726



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