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: SLNSCA01XXX

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
831-223 A Soledad CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-233 A Monterey CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-293 A Carmel CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-296 A Salinas CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-299 A Tres Pinos CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-300 A Big Sur CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-302 A San Lucas CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-305 A Gonzales CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-306 A Chualar CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-307 A Castroville CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-350 A Tres Pinos CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-525 A King City CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-652 A Carmel Valley CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-664 A Hollister CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-665 A Hollister CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-732 A San Ardo CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-741 A Castroville CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-778 A San Lucas CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-920 A Monterey CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      
831-921 A Tres Pinos CA 8826 LEVEL 3 COMMUNICATIONS, LLC - CA 736      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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