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: 830 [Rate centres in NPA 830] [Dial plan for NPA 830]

NXX: 554

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
830-554 A Blanco TX SNANTX78G00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-554 0 Blanco TX SNANTX78G00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-554 1 Blanco TX SNANTXCA73Z  939H COMMIO, LLC 566   2023-08-27   
830-554 2 Blanco TX SNANTXCA73Z  939H COMMIO, LLC 566   2024-01-18   
830-554 3 Blanco TX SNANTXCA73Z  939H COMMIO, LLC 566   2024-01-18   
830-554 4 Blanco TX FRBGTXXA0MD  903C ONVOY, LLC - TX 566   2021-09-03   
830-554 5 Blanco TX SNANTXDIXKX  506J TWILIO INTERNATIONAL, INC. 566   2021-05-27   
830-554 6 Blanco TX   624H ONVOY SPECTRUM, LLC 566   2024-03-18   
830-554 7 Blanco TX SNANTXCA60Z  508J CENTURYLINK COMMUNICATIONS, LLC 566   2018-01-11   
830-554 8 Blanco TX SNANTX78G00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566   2018-07-14   
830-554 9 Blanco TX SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566   2009-02-21   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.