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.
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Switch: ALHBCA0165T

NPA-NXX BLOCK Rate Centre Region OCN LATA Eff date Disc date Map
323-520 A Los Angeles: DA 14 CA 9740 PACIFIC BELL 730     map

Last updated: Thu, 03 Aug 2017 01:55:51 UTC

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