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: GRDNCA02DS3

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
310-404 A Compton: Gardena DA CA 7421 AT&T LOCAL 730      
310-619 A Torrance CA 7421 AT&T LOCAL 730      
310-744 A El Segundo CA 7421 AT&T LOCAL 730      
310-981 A Inglewood CA 7421 AT&T LOCAL 730      
323-362 A Los Angeles: DA 05 CA 7421 AT&T LOCAL 730      
562-443 A Compton: Compton DA CA 7421 AT&T LOCAL 730      
714-947 A Cypress CA 7421 AT&T LOCAL 730      

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.