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.

Harrison, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
989-368 A SGNWMIFAXNX  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 344      
989-368 0 SGNWMIFAXKX  543C ONVOY, LLC - MI 344   2015-08-02   
989-368 1 SGNWMIPA1MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 344   2013-12-21   
989-368 2 SGNWMIFAXKX  543C ONVOY, LLC - MI 344   2016-04-11   
989-368 3 SGNWMIFAXKX  543C ONVOY, LLC - MI 344   2016-04-11   
989-368 4 SGNWMIFAX5X  7279 MCI WORLDCOM COMMUNICATIONS, INC. - MI 344   2020-08-03   
989-368 5   543C ONVOY, LLC - MI 344   2021-03-05   
989-368 6 SGNWMIFAXNX  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 344   2012-05-13   
989-368 7 SGNWMIFAXCY  7575 CENTURYLINK COMMUNICATIONS LLC 344   2015-05-06   
989-368 8 SGNWMIFAXKX  543C ONVOY, LLC - MI 344   2013-03-15   
989-368 9 SGNWMIACDS1  933G PEERLESS NETWORK OF MICHIGAN, LLC - MI 344   2015-12-22   
989-371 A   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS LLC 344   2021-04-30   
989-371 9   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS LLC 344   2021-04-30   
989-429 A SGNWMIEC0MD  6664 SPRINT SPECTRUM L.P. 344      
989-539 A HRSNMIMNDS0  9323 AMERITECH MICHIGAN 344      
989-630 A SGNWMIEC0MD  6664 SPRINT SPECTRUM L.P. 344      
989-630 0 SGNWMIPA1MD  351D CHARTER FIBERLINK - MICHIGAN, LLC - MI 344   2007-02-26   
989-630 1 SGNWMIFAXUX  473D CMC TELECOM, INC. - MI 344   2008-02-25   
989-630 2 SGNWMIFAZMD  2550 123 NET, INC. 344   2009-02-27   
989-630 3 SGNWMIEC0MD  6664 SPRINT SPECTRUM L.P. 344   2010-07-20   
989-630 4 SGNWMIFAXJX  991E BANDWIDTH.COM CLEC, LLC - MI 344   2010-09-11   
989-630 5   279B CLEAR RATE COMMUNICATIONS - CLEC - MI 344   2009-06-04   
989-630 6 SGNWMIEC0MD  6664 SPRINT SPECTRUM L.P. 344   2006-10-16   
989-630 7 SGNWMIEC0MD  6664 SPRINT SPECTRUM L.P. 344   2009-03-06   
989-630 8 SGNWMIEC0MD  6664 SPRINT SPECTRUM L.P. 344   2011-01-20   
989-630 9 SGNWMIATX0X  516C AT&T CORP. 344   2011-09-30   
989-741 A MNPLMICFDS1  0127 WINN TELEPHONE COMPANY DBA WINN TELECOM - MI 344      
989-741 0 SGNWMIEC0MD  6664 SPRINT SPECTRUM L.P. 344   2011-10-24   
989-741 1 SGNWMIEC0MD  6664 SPRINT SPECTRUM L.P. 344   2005-06-04   
989-741 2 SGNWMIACDS0  4632 TELNET WORLDWIDE, INC. 344   2005-09-04   
989-741 3 SGNWMIEC0MD  6664 SPRINT SPECTRUM L.P. 344   2005-10-02   
989-741 4   543C ONVOY, LLC - MI 344   2021-03-05   
989-741 5 SGNWMIACCMD  145J TERRA NOVA TELECOM INC. 344   2021-01-22   
989-741 6   2964 OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS LLC 344   2021-03-26   
989-741 7 SGNWMIFAXCX  0975 LONG DISTANCE OF MICHIGAN, INC. DBA LDMI - MI 344   2005-04-20   
989-741 8 MNPLMICFDS1  0127 WINN TELEPHONE COMPANY DBA WINN TELECOM - MI 344   2006-04-15   
989-741 9 SGNWMIECXQX  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 344   2006-05-31   

Last updated: Tue, 04 May 2021 15:04:27 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.