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: 337 [Rate centres in NPA 337] [Dial plan for NPA 337]

NXX: 674

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
337-674 A Sulphur LA LFYTLAMAXIZ  516J TON80 COMMUNICATIONS, LLC 488      
337-674 0 Sulphur LA LFYTLA364MD  939H COMMIO, LLC 488   2022-07-22   
337-674 1 Sulphur LA LFYTLAMAX7Z  624H ONVOY SPECTRUM, LLC 488   2023-07-29   
337-674 2 Sulphur LA LFYTLAMAX9Y  749E ONVOY, LLC - LA 488   2023-08-11   
337-674 3 Sulphur LA LFYTLAMAX9Y  749E ONVOY, LLC - LA 488   2023-08-11   
337-674 4 Sulphur LA LFYTLAMAX9Y  749E ONVOY, LLC - LA 488   2023-08-11   
337-674 5 Sulphur LA LFYTLAMAX9Y  749E ONVOY, LLC - LA 488   2023-08-11   
337-674 6 Sulphur LA LFYTLAMAX9Y  749E ONVOY, LLC - LA 488   2023-08-11   
337-674 7 Sulphur LA   515J IP HORIZON LLC 488   2024-04-29   
337-674 8 Sulphur LA LFYTLAMAXIZ  516J TON80 COMMUNICATIONS, LLC 488   2022-03-31   
337-674 9 Sulphur LA LFYTLAMAX9Y  749E ONVOY, LLC - LA 488   2023-09-09   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.