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: SLNSCA01X7Y

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
831-200 7 Monterey CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-225 A Salinas CA 508J CENTURYLINK COMMUNICATIONS, LLC 736      
831-225 7 Salinas CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-09-30   
831-237 4 Soledad CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-244 7 Big Sur CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-263 7 King City CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-290 7 Gonzales CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-382 7 San Lucas CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-574 7 Carmel CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-593 7 San Juan CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-613 7 Greenfield (Monterey) CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-627 7 San Ardo CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-652 7 Carmel Valley CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-664 7 Hollister CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-705 7 Chualar CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   
831-741 7 Castroville CA 508J CENTURYLINK COMMUNICATIONS, LLC 736   2015-11-09   

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

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