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: SLNSCA01X1X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
831-223 5 Soledad CA 7421 AT&T - LOCAL 736   2006-11-17   
831-241 A Monterey CA 7421 AT&T - LOCAL 736      
831-241 9 Monterey CA 7421 AT&T - LOCAL 736      
831-675 4 Gonzales CA 7421 AT&T - LOCAL 736   2013-05-01   
831-676 A Salinas CA 7421 AT&T - LOCAL 736      
831-676 9 Salinas CA 7421 AT&T - LOCAL 736      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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