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.

NPA: 737 [Rate centres in NPA 737] [Dial plan for NPA 737]

NXX: 392

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
737-392 A San Marcos TX   506J TWILIO INTERNATIONAL, INC. 558   2024-12-16   
737-392 0 San Marcos TX   903C ONVOY, LLC - TX 558      
737-392 1 San Marcos TX   903C ONVOY, LLC - TX 558      
737-392 3 San Marcos TX   506J TWILIO INTERNATIONAL, INC. 558      

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.