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: FMHLMIFHDS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
248-324 A Farmington MI 9323 MICHIGAN BELL TEL CO 340      
248-325 A West Bloomfield MI 9323 MICHIGAN BELL TEL CO 340      
248-488 A Farmington MI 9323 MICHIGAN BELL TEL CO 340      
248-489 A Farmington MI 9323 MICHIGAN BELL TEL CO 340      
248-553 A Farmington MI 9323 MICHIGAN BELL TEL CO 340      
248-592 A West Bloomfield MI 9323 MICHIGAN BELL TEL CO 340      
248-661 A West Bloomfield MI 9323 MICHIGAN BELL TEL CO 340      
248-788 A West Bloomfield MI 9323 MICHIGAN BELL TEL CO 340      
248-848 A Farmington MI 9323 MICHIGAN BELL TEL CO 340      
248-994 A Farmington MI 9323 MICHIGAN BELL TEL CO 340      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.