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: 281 [Rate centres in NPA 281] [Dial plan for NPA 281]

NXX: 533

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
281-533 A Valley Lodge TX VLLDTXVLDS0  9533 SOUTHWESTERN BELL 560      
281-533 0 Valley Lodge TX VLLDTXVLDS0  9533 SOUTHWESTERN BELL 560      
281-533 1 Valley Lodge TX HSTQTXRG6MD  139F WORLDCALL INTERCONNECT INC. 560   2008-12-13   
281-533 2 Valley Lodge TX HSTATX750MD  829J PAETEC ITEL, LLC 560   2012-10-10   
281-533 3 Valley Lodge TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2011-03-25   
281-533 4 Valley Lodge TX HSTNTX01X7X  516C AT&T CORP. 560   2011-02-05   
281-533 6 Valley Lodge TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2011-09-02   
281-533 8 Valley Lodge TX HSTNTXYADS5  903C ONVOY, LLC - TX 560   2012-06-18   
281-533 9 Valley Lodge TX VLLDTXVLDS0  9533 SOUTHWESTERN BELL 560      

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.