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.

Castroville, TX

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
830-346 A SNANTXCAHMD  073H TELNYX LLC 566      
830-346 0 SNANTXCAHMD  073H TELNYX LLC 566      
830-346 1 SNANTXCA34Z  004F BANDWIDTH.COM CLEC, LLC - TX 566      
830-346 2 SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-346 3 SNANTXCADS6  177F PEERLESS NETWORK OF TEXAS, LLC - TX 566      
830-346 4 SNANTXCADS6  177F PEERLESS NETWORK OF TEXAS, LLC - TX 566      
830-346 5 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-346 6 SNANTXCA80Z  624H ONVOY SPECTRUM, LLC 566      
830-346 7 SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-346 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-346 9 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-349 A SNANTXCA41Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
830-349 0   4290 STPCS JOINT VENTURE, LLC 566      
830-349 1   4290 STPCS JOINT VENTURE, LLC 566      
830-349 2   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-349 4 SNANTXCA88Z  516J TON80 COMMUNICATIONS, LLC 566      
830-349 6 SNANTXCA41Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 566      
830-349 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-349 8 SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-349 9 SNANTXCA94Z  490J DISH WIRELESS, LLC 566      
830-355 A SNAQTXKY7MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 566      
830-355 0 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-355 1 SNANTX78G00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-355 2 SNAQTXKY7MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 566      
830-355 3 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-355 4 SNAQTXKY7MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 566      
830-355 5 SNANTX91X2Y  5562 METROPCS, INC. 566      
830-355 6 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-355 7 SNANTX78G00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-355 8 SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-355 9 SNANTXCADS6  177F PEERLESS NETWORK OF TEXAS, LLC - TX 566      
830-521 A SNANTX91DS2  7715 MATRIX TELECOM, LLC. S/I/I TNCI - TX 566      
830-521 0 SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-521 2 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-521 3 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-521 4 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-521 5 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-521 6 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-521 7 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-521 8 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-521 9 SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-538 A CSVLTXCTDS0  9533 SOUTHWESTERN BELL 566      
830-538 0 SNANTXDIRMD  903C ONVOY, LLC - TX 566      
830-538 1 CSVLTXCTDS0  9533 SOUTHWESTERN BELL 566      
830-538 2 CSVLTXCTDS0  9533 SOUTHWESTERN BELL 566      
830-538 3 CSVLTXCTDS0  9533 SOUTHWESTERN BELL 566      
830-538 4 SNANTX78GT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-538 5 SNANTXCA58Z  516C AT&T CORP. 566      
830-538 6 CSVLTXCTDS0  9533 SOUTHWESTERN BELL 566      
830-538 7 SNANTXCA60Z  508J CENTURYLINK COMMUNICATIONS, LLC 566      
830-538 8 SNANTX78G00  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 566      
830-538 9 CSVLTXCTDS0  9533 SOUTHWESTERN BELL 566      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.