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.

OCN: 7279 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI

<< 1 2 3 4 5 6 7 8 9 10 11

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
810-958 5 Port Huron MI   340      
810-958 6 Port Huron MI   340      
810-958 7 Port Huron MI   340      
810-958 8 Port Huron MI   340      
810-963 A Flint MI SFLDMIQJDS1  340      
810-963 0 Flint MI SFLDMIQJDS1  340      
810-963 1 Flint MI SFLDMIQJDS1  340      
810-963 2 Flint MI SFLDMIQJDS1  340      
810-963 4 Flint MI SFLDMIQJDS1  340      
810-963 5 Flint MI SFLDMIQJDS1  340      
810-963 6 Flint MI SFLDMIQJDS1  340      
810-963 7 Flint MI SFLDMIQJDS1  340      
810-963 8 Flint MI SFLDMIQJDS1  340      
810-991 7 Hartland MI SFLDMIQJDS1  340   2005-07-21   
906-212 3 Escanaba MI MRQTMIMNYMD  342   2019-09-23   
906-251 3 Marquette MI MRQTMIMNYMD  342   2019-01-15   
906-253 8 Sault Ste Marie MI MRQTMIMNYMD  342   2019-01-22   
906-275 3 Houghton MI MRQTMIMNYMD  342   2019-09-22   
906-352 3 Menominee MI MRQTMIMNYMD  342   2019-09-22   
906-372 5 Gwinn MI MRQTMIMNYMD  342   2019-09-16   
906-401 3 Negaunee MI MRQTMIMNYMD  342   2019-09-16   
906-448 3 Iron Mountain MI MRQTMIMNYMD  342   2019-09-16   
906-464 A Ishpeming MI MRQTMIMNYMD  342      
906-464 9 Ishpeming MI MRQTMIMNYMD  342   2003-09-01   
906-729 3 Calumet MI MRQTMIMNYMD  342   2019-09-22   
906-767 3 Ironwood MI MRQTMIMNYMD  342   2019-09-22   
906-825 3 Gladstone MI MRQTMIMNYMD  342   2019-09-23   
906-826 3 Stephenson MI MRQTMIMNYMD  342   2019-09-22   
947-517 0 Southfield MI SFLDMIQJDS1  340   2009-12-24   
989-202 6 Houghton Lake MI SGNWMIFAX5X  344   2011-03-01   
989-217 3 Gaylord MI SGNWMIFAX5X  344   2010-03-01   
989-286 9 Caro MI SGNWMIFAX5X  344   2018-08-07   
989-310 4 East Tawas MI SGNWMIFAX5X  344   2016-03-15   
989-341 5 Saginaw MI SGNWMIFAX5X  344   2015-01-15   
989-342 5 Lewiston MI SGNWMIFAX5X  344   2020-08-03   
989-346 A Mio MI SGNWMIFAX5X  344      
989-346 3 Mio MI SGNWMIFAX5X  344   2020-09-04   
989-349 3 Birch Run MI SGNWMIFAX5X  344   2009-03-29   
989-359 3 Gladwin MI SGNWMIFAX5X  344   2011-12-16   
989-361 4 Auburn MI SGNWMIFAX5X  344   2022-03-31   
989-368 4 Harrison MI SGNWMIFAX5X  344   2020-08-03   
989-391 3 Bay City MI SGNWMIFAX5X  344   2007-06-30   
989-449 3 Ithaca MI SGNWMIFAX5X  344   2016-06-10   
989-465 4 Coleman MI SGNWMIFAX5X  344   2012-06-01   
989-472 5 Owosso MI SGNWMIFAX5X  344   2007-06-30   
989-484 A Saginaw MI SGNWMIFAX5X  344      
989-484 9 Saginaw MI SGNWMIFAX5X  344   2003-09-01   
989-486 2 Midland MI SGNWMIFAX5X  344   2006-05-26   
989-533 3 Alma MI SGNWMIFAX5X  344   2011-02-01   
989-534 3 St Johns MI SGNWMIFAX5X  344   2012-12-17   
989-541 3 Durand MI SGNWMIFAX5X  344   2012-12-17   
989-546 2 Mount Pleasant MI SGNWMIFAX5X  344   2006-11-05   
989-569 2 Oscoda MI SGNWMIFAX5X  344   2020-09-04   
989-581 3 Ovid MI SGNWMIFAX5X  344   2012-12-17   
989-623 3 Bad Axe MI SGNWMIFAX5X  344   2012-03-01   
989-692 5 Freeland MI SGNWMIFAX5X  344   2009-12-10   
989-726 3 West Branch MI SGNWMIFAX5X  344   2010-09-01   
989-783 3 Roscommon MI SGNWMIFAX5X  344   2014-01-10   
989-785 7 Atlanta MI SGNWMIFAX5X  344   2010-09-01   
989-818 4 Lakeview MI SGNWMIFAX5X  344   2018-04-02   
989-889 3 Grayling MI SGNWMIFAX5X  344   2012-11-01   
989-898 5 Midland MI SGNWMIFAX5X  344   2019-10-17   
989-931 A Farwell MI SGNWMIFAX5X  344      
989-931 3 Farwell MI SGNWMIFAX5X  344   2019-02-05   

<< 1 2 3 4 5 6 7 8 9 10 11

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.