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: HSTNTX01DS2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
281-201 A Sugar Land TX 7421 AT&T - LOCAL 560      
281-206 A Barker TX 7421 AT&T - LOCAL 560      
281-248 A Bammel TX 7421 AT&T - LOCAL 560      
281-310 A Houston Suburban TX 7421 AT&T - LOCAL 560      
713-577 A Houston TX 7421 AT&T - LOCAL 560      
832-261 A Seabrook TX 7421 AT&T - LOCAL 560      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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