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: 430 [Rate centres in NPA 430] [Dial plan for NPA 430]

NXX: 433

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
430-433 A Como TX DLLRTXVM0MD  506J TWILIO INTERNATIONAL, INC. 552      
430-433 0 Como TX DLLSTXRIXYY  318C CEBRIDGE TELECOM TX , L.P. - TX 552   2022-10-23   
430-433 1 Como TX DLLSTXRIXIY  583C TIME WARNER CBLE INFO SVC (TX) DBA TIME WARNER CBL 552   2022-05-15   
430-433 4 Como TX DLLRTXVM0MD  506J TWILIO INTERNATIONAL, INC. 552   2020-10-31   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.