Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 713 [Rate centres in NPA 713] [Dial plan for NPA 713]

Region: TX

OCN: 7421 AT&T - LOCAL

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
713-577 A Houston TX HSTNTX01DS2  560      
713-577 0 Houston TX HSTNTX01DS2  560      
713-577 1 Houston TX HSTNTX01DS2  560      
713-577 2 Houston TX HSTNTX01DS2  560      
713-577 3 Houston TX HSTNTX01DS2  560      
713-577 4 Houston TX HSTNTX01DS2  560      
713-577 5 Houston TX HSTNTX01DS2  560      
713-577 6 Houston TX HSTNTX01DS2  560      
713-577 7 Houston TX HSTNTX01DS2  560      
713-577 8 Houston TX HSTNTX01DS2  560      

Last updated: Wed, 04 Mar 2026 03:00:52 UTC

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