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: SNDGCA0239Z

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
442-253 A Calipatria CA 508J CENTURYLINK COMMUNICATIONS, LLC 732      
619-373 A Chula Vista CA 508J CENTURYLINK COMMUNICATIONS, LLC 732      
619-383 A El Cajon CA 508J CENTURYLINK COMMUNICATIONS, LLC 732      
619-821 A San Diego: San Diego DA CA 508J CENTURYLINK COMMUNICATIONS, LLC 732      
760-573 A Oceanside: Oceanside DA CA 508J CENTURYLINK COMMUNICATIONS, LLC 732      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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