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: 403

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
337-403 A Hayes LA SCTTLA06G02  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 488      
337-403 0 Hayes LA LFYTLAMAX7Z  624H ONVOY SPECTRUM, LLC 488      
337-403 1 Hayes LA LFYTLAMAX9Y  749E ONVOY, LLC - LA 488      
337-403 2 Hayes LA LFYTLA3624Z  490J DISH WIRELESS, LLC 488      
337-403 3 Hayes LA LFYTLAMAX9Y  749E ONVOY, LLC - LA 488      
337-403 4 Hayes LA LFYTLAMAX9Y  749E ONVOY, LLC - LA 488      
337-403 7 Hayes LA LFYTLAMAX5X  3232 LEVEL 3 COMMUNICATIONS, LLC - LA 488      
337-403 9 Hayes LA SCTTLA06G02  6214 NEW CINGULAR WIRELESS PCS, LLC - GA 488      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.