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: CMPTMIIFCM0

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NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
248-235 A Royal Oak MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-271 A Holly MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-279 A Northville MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-314 A Northville MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-323 A Pontiac MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-367 A Royal Oak MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-400 A Southfield MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-407 A Auburn Heights MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-441 A Auburn Heights MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-523 A Farmington MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-527 A Pontiac MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-570 A Pontiac MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-612 A Holly MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-725 A Pontiac MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-806 A Pontiac MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-815 A Pontiac MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-992 A Royal Oak MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-995 A Royal Oak MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
248-998 A Royal Oak MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-201 A Detroit Zone 4 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-260 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-325 A Detroit Zone 4 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-430 A Detroit Zone 1 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-503 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-601 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-606 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-609 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-660 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-684 A Detroit Zone 4 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-691 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-705 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-709 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-714 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-754 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-793 A Detroit Zone 4 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-795 A Detroit Zone 4 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-796 A Detroit Zone 4 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-803 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-813 A Detroit Zone 4 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-814 A Detroit Zone 4 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-840 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-851 A Detroit Zone 6 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
313-990 A Detroit Zone 5 MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-308 A Roseville MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-309 A Roseville MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-319 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-380 A Romeo MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-402 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-406 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      
586-418 A Warren MI 9748 AMERICAN MESSAGING SERVICES, LLC 340      

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Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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