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: MDLDTXMUXRX

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
915-278 2 Sierra Blanca TX 903C ONVOY, LLC - TX 542   2021-10-09   
915-278 8 Sierra Blanca TX 903C ONVOY, LLC - TX 542   2021-09-04   
915-369 6 Sierra Blanca TX 903C ONVOY, LLC - TX 542   2021-01-30   

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Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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