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: TROYMIMNRPA

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
248-307 A Royal Oak MI 9323 MICHIGAN BELL TEL CO 340      
248-457 A Troy MI 9323 MICHIGAN BELL TEL CO 340      
248-524 A Troy MI 9323 MICHIGAN BELL TEL CO 340      
248-526 A Troy MI 9323 MICHIGAN BELL TEL CO 340      
248-528 A Troy MI 9323 MICHIGAN BELL TEL CO 340      
248-577 A Royal Oak MI 9323 MICHIGAN BELL TEL CO 340      
248-583 A Royal Oak MI 9323 MICHIGAN BELL TEL CO 340      
248-585 A Royal Oak MI 9323 MICHIGAN BELL TEL CO 340      
248-588 A Royal Oak MI 9323 MICHIGAN BELL TEL CO 340      
248-589 A Royal Oak MI 9323 MICHIGAN BELL TEL CO 340      
248-597 A Royal Oak MI 9323 MICHIGAN BELL TEL CO 340      
248-616 A Royal Oak MI 9323 MICHIGAN BELL TEL CO 340      
248-619 A Troy MI 9323 MICHIGAN BELL TEL CO 340      
248-680 A Troy MI 9323 MICHIGAN BELL TEL CO 340      
248-689 A Troy MI 9323 MICHIGAN BELL TEL CO 340      
248-733 A Royal Oak MI 9323 MICHIGAN BELL TEL CO 340      
248-740 A Troy MI 9323 MICHIGAN BELL TEL CO 340      
248-743 A Troy MI 9323 MICHIGAN BELL TEL CO 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.