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: 372

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
989-372 A Saginaw MI SGNWMIFAXJX  991E BANDWIDTH.COM CLEC, LLC - MI 344      
989-372 0 Saginaw MI SGNWMIFAXJX  991E BANDWIDTH.COM CLEC, LLC - MI 344   2008-12-08   
989-372 1 Saginaw MI SGNWMIFAXJX  991E BANDWIDTH.COM CLEC, LLC - MI 344   2009-03-06   
989-372 2 Saginaw MI SGNWMIFAXFY  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 344   2010-07-16   
989-372 3 Saginaw MI SGNWMIFAXFY  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 344   2010-07-16   
989-372 4 Saginaw MI SGNWMIFAXFY  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 344   2010-07-16   
989-372 5 Saginaw MI SGNWMIFAXFY  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 344   2010-07-16   
989-372 6 Saginaw MI SGNWMIFAXJX  991E BANDWIDTH.COM CLEC, LLC - MI 344   2012-10-19   
989-372 7 Saginaw MI SGNWMIFAXFY  2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 344   2013-02-21   
989-372 8 Saginaw MI   543C ONVOY, LLCV - MI 344   2015-12-17   
989-372 9 Saginaw MI SGNWMIACDS1  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 344   2014-05-03   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.