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: FRBGTXXAX3X

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
830-201 A Marble Falls TX 793K TWC IP ENABLED SERVICES, LLC 566      
830-201 4 Marble Falls TX 793K TWC IP ENABLED SERVICES, LLC 566   2007-03-20   
830-220 5 Marble Falls TX 793K TWC IP ENABLED SERVICES, LLC 566   2010-11-06   
830-307 3 Fredericksburg TX 793K TWC IP ENABLED SERVICES, LLC 566   2010-11-06   
830-307 9 Fredericksburg TX 793K TWC IP ENABLED SERVICES, LLC 566   2014-11-21   
830-331 4 Boerne TX 793K TWC IP ENABLED SERVICES, LLC 566   2006-12-06   
830-357 5 Boerne TX 793K TWC IP ENABLED SERVICES, LLC 566   2010-11-06   
830-383 1 Fredericksburg TX 793K TWC IP ENABLED SERVICES, LLC 566   2016-09-29   
830-392 5 Blanco TX 793K TWC IP ENABLED SERVICES, LLC 566   2015-08-11   
830-992 3 Fredericksburg TX 793K TWC IP ENABLED SERVICES, LLC 566   2006-01-09   

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

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