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.

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
858-977 9 Del Mar CA 6529 T-MOBILE USA, INC. 732   2020-10-26   
909-631 4 Chino CA 6529 T-MOBILE USA, INC. 730   2005-10-16   

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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