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: 713 [Rate centres in NPA 713] [Dial plan for NPA 713]

NXX: 577

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
713-577 A Houston TX HSTNTX01DS2  7421 AT&T - LOCAL 560      
713-577 0 Houston TX HSTNTX01DS2  7421 AT&T - LOCAL 560      
713-577 1 Houston TX HSTNTX01DS2  7421 AT&T - LOCAL 560      
713-577 2 Houston TX HSTNTX01DS2  7421 AT&T - LOCAL 560      
713-577 3 Houston TX HSTNTX01DS2  7421 AT&T - LOCAL 560      
713-577 4 Houston TX HSTNTX01DS2  7421 AT&T - LOCAL 560      
713-577 5 Houston TX HSTNTX01DS2  7421 AT&T - LOCAL 560      
713-577 6 Houston TX HSTNTX01DS2  7421 AT&T - LOCAL 560      
713-577 7 Houston TX HSTNTX01DS2  7421 AT&T - LOCAL 560      
713-577 8 Houston TX HSTNTX01DS2  7421 AT&T - LOCAL 560      
713-577 9 Houston TX HSTDTXBG9MD  6701 AERIAL COMMUNICATIONS, INC. 560   2005-02-06   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.