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.

Switch: SLNSCA01X8Y

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
831-975 8 Salinas CA 6529 T-MOBILE USA, INC. 736   2014-09-30   
831-975 9 Salinas CA 5562 METROPCS, INC. 736   2014-06-13   
831-998 5 Salinas CA 5562 METROPCS, INC. 736   2013-10-21   
831-998 6 Salinas CA 5562 METROPCS, INC. 736   2013-08-01   

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Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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