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: LSAGCASEDS7

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
213-394 A Los Angeles: DA 01 CA 478A DMR COMMUNICATIONS INC. - CA 730      
213-394 1 Los Angeles: DA 01 CA 478A DMR COMMUNICATIONS INC. - CA 730   2005-12-04   
714-204 A Anaheim CA 478A DMR COMMUNICATIONS INC. - CA 730      
714-204 0 Anaheim CA 478A DMR COMMUNICATIONS INC. - CA 730   2006-12-31   
909-201 A Fontana CA 478A DMR COMMUNICATIONS INC. - CA 730      
909-201 0 Fontana CA 478A DMR COMMUNICATIONS INC. - CA 730   2006-12-31   
949-336 A Irvine CA 478A DMR COMMUNICATIONS INC. - CA 730      
949-336 0 Irvine CA 478A DMR COMMUNICATIONS INC. - CA 730   2006-12-31   

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

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