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.

Johnsons Bayou, LA

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
337-569 A CRLYLAXADS1  0425 CAMERON TEL CO 488      
337-645 A LFYTLA3624Z  490J DISH WIRELESS, LLC 488      
337-645 0   490J DISH WIRELESS, LLC 488   2023-08-04   
337-645 4   3232 LEVEL 3 COMMUNICATIONS, LLC - LA 488   2025-04-07   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.