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.

NPA: 747 [Rate centres in NPA 747] [Dial plan for NPA 747]

NXX: 387

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
747-387 A San Fernando: Sepulveda DA CA   649C ONVOY, LLC - CA 730   2026-09-18   
747-387 0 San Fernando: Sepulveda DA CA   649C ONVOY, LLC - CA 730   2026-09-18   
747-387 1 San Fernando: Sepulveda DA CA   649C ONVOY, LLC - CA 730   2026-09-18   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.