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: 600

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
281-600 A Barker TX   903C ONVOY, LLC - TX 560      
281-600 0 Barker TX   145J TERRA NOVA TELECOM INC. 560   2025-11-05   
281-600 2 Barker TX   903C ONVOY, LLC - TX 560      
281-600 3 Barker TX   903C ONVOY, LLC - TX 560      
281-600 8 Barker TX   903C ONVOY, LLC - TX 560      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.