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: 327

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
737-327 A Hutto TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558      
737-327 0 Hutto TX   073H TELNYX LLC 558   2021-03-19   
737-327 1 Hutto TX   624H ONVOY SPECTRUM, LLC 558   2021-06-27   
737-327 2 Hutto TX   516J TON80 COMMUNICATIONS, LLC 558   2021-03-29   
737-327 3 Hutto TX   903C ONVOY, LLC - TX 558   2023-08-26   
737-327 4 Hutto TX   903C ONVOY, LLC - TX 558   2021-04-30   
737-327 5 Hutto TX   903C ONVOY, LLC - TX 558   2021-04-30   
737-327 6 Hutto TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2021-05-17   
737-327 7 Hutto TX   903C ONVOY, LLC - TX 558   2021-03-14   
737-327 8 Hutto TX   903C ONVOY, LLC - TX 558   2021-03-14   
737-327 9 Hutto TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2021-05-17   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.