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.

OCN: 733J WIRETAP TELECOM, LLC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
248-201 A Southfield MI SFLDMIMKMMD  340      
248-201 0 Southfield MI SFLDMIMKMMD  340   2023-10-16   
557-999 A Sappington MO STLSMOGZSMD  520      
557-999 7 Sappington MO STLSMOGZSMD  520   2023-05-13   
572-777 A Harrah OK OKCYOKCE23Z  536      
572-777 1 Harrah OK OKCYOKCE23Z  536   2023-05-13   
616-370 A Grand Rapids MI BRSPMI09FMD  348      
616-370 0 Grand Rapids MI BRSPMI09FMD  348   2023-10-16   

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.