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: AUSUTX78DS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
512-233 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-275 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-362 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-384 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-605 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-651 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-652 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-692 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-721 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-726 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-813 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-853 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
512-952 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
737-203 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
737-248 A Kyle TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
737-484 A Austin TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      
737-843 A Leander TX 7249 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX 558      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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