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.

Onondaga, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
517-628 A ONDGMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-628 0 LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2004-12-31   
517-628 2 ONDGMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-628 3 ONDGMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-628 4 LNNGMIMNX5Z  543C ONVOY, LLC - MI 346   2007-03-09   
517-628 5 LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346   2004-07-17   
517-628 7 LNNGMIMNXQZ  7575 CENTURYLINK COMMUNICATIONS LLC 346   2016-01-26   
517-628 8 ONDGMIXIDS0  0681 FRONTIER MIDSTATES, INC. - MI 346      
517-766 A LNNGMIDCDS0  4632 TELNET WORLDWIDE, INC. 346      
517-785 A LNNGMIMNX3Y  2550 123 NET, INC. 346      
517-910 A LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346      
517-910 1   543C ONVOY, LLC - MI 346   2021-03-05   
517-910 2 LNNGMIMNX8Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 346   2017-02-27   
517-910 3 LNNGMIMNX4Z  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 346   2009-09-26   
517-910 4 LNNGMIMNXJZ  668E SIGECOM, LLC DBA WOW INTERNET CABLE AND PHONE 346   2012-05-20   
517-910 5   543C ONVOY, LLC - MI 346   2021-03-05   
517-910 6 LNNGMIVE2MD  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 346   2006-03-17   
517-910 7 LNNGMIMNX5Z  543C ONVOY, LLC - MI 346   2013-04-05   
517-957 A MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.