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.

Switch: SNANTX91DS6

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
210-236 4 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2011-01-18   
210-237 A San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566      
210-237 4 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2004-08-26   
210-476 6 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2009-05-07   
210-503 2 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2014-05-12   
210-503 3 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2014-05-12   
210-503 4 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2014-06-13   
210-503 6 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2014-06-13   
210-631 A San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566      
210-631 0 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2011-07-01   
210-631 1 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2011-07-01   
210-631 2 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2011-07-01   
210-631 3 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2011-07-01   
210-631 4 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2011-07-01   
210-631 5 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2011-07-01   
210-631 6 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2011-07-01   
210-631 7 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2011-07-01   
210-631 8 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2011-07-01   
210-631 9 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2011-07-01   
210-801 7 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2014-09-08   
210-801 8 San Antonio TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2014-09-08   
956-602 7 Laredo TX 8434 LEVEL 3 TELECOM OF TEXAS, LLC 566   2014-12-25   

Last updated: Sun, 28 Feb 2021 19:06:05 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.