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.

NPA: 989 [Rate centres in NPA 989] [Dial plan for NPA 989]

NXX: 266

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
989-266 A Auburn MI SGNWMIFAXEX  829J PAETEC ITEL, LLC 344      
989-266 0 Auburn MI   829J PAETEC ITEL, LLC 344   2005-05-16   
989-266 1 Auburn MI   543C ONVOY, LLCV - MI 344   2023-08-26   
989-266 2 Auburn MI   6120 LEVEL 3 COMMUNICATIONS, LLC - MI 344   2006-01-14   
989-266 3 Auburn MI   792K CHARTER IP ENABLED SERVICES, LLC 344   2007-02-25   
989-266 4 Auburn MI   543C ONVOY, LLCV - MI 344   2012-02-22   
989-266 5 Auburn MI   991E BANDWIDTH.COM CLEC, LLC - MI 344   2012-07-06   
989-266 6 Auburn MI   543C ONVOY, LLCV - MI 344   2012-12-28   
989-266 7 Auburn MI   516C AT&T CORP. 344   2011-09-30   
989-266 8 Auburn MI   933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 344   2014-04-12   
989-266 9 Auburn MI   543C ONVOY, LLCV - MI 344   2013-03-15   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.