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: 770

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
337-770 A Lafayette LA LFYTLA364MD  939H COMMIO, LLC 488      
337-770 0 Lafayette LA LFYTLA364MD  939H COMMIO, LLC 488   2022-06-19   
337-770 1 Lafayette LA LFYTLAMAX7Z  624H ONVOY SPECTRUM, LLC 488   2022-11-08   
337-770 2 Lafayette LA LFYTLAMAX9Y  749E ONVOY, LLC - LA 488   2025-01-09   
337-770 3 Lafayette LA LFYTLAMAX9Y  749E ONVOY, LLC - LA 488   2025-01-09   
337-770 6 Lafayette LA LFYTLAMAX7Z  624H ONVOY SPECTRUM, LLC 488   2022-08-12   
337-770 7 Lafayette LA LFYTLAMAX7Z  624H ONVOY SPECTRUM, LLC 488   2022-08-12   
337-770 8 Lafayette LA LFYTLAMAX7Z  624H ONVOY SPECTRUM, LLC 488   2022-08-12   
337-770 9 Lafayette LA LFYTLAMAX7Z  624H ONVOY SPECTRUM, LLC 488   2022-08-12   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.