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.

Switch: SFLDMIBV3MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
248-234 A Southfield MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      
248-518 A Clarkston MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      
248-781 A Troy MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      
248-923 A Rochester MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      
517-208 A Britton MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      
517-429 A Hudson MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      
586-221 A Mount Clemens MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      
734-221 A Ypsilanti MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      
734-702 A Whitmore Lake MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      
810-279 A Hartland MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      
810-339 A Flint MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      
810-445 A Grand Blanc MI 508J CENTURYLINK COMMUNICATIONS, LLC 340      

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

Sponsored by: BeeVox - Whitelabel Reseller Platform

Like this site? We accept donations via PayPal.