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.

Whitehall, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
231-292 A   792K CHARTER IP ENABLED SERVICES, LLC 348      
231-292 0 GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2016-02-26   
231-292 1   792K CHARTER IP ENABLED SERVICES, LLC 348   2010-09-13   
231-292 2 WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2010-09-30   
231-292 3 GDRQMIBODS0  7157 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 348   2013-01-07   
231-292 5 GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2016-02-26   
231-292 6 WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2016-01-21   
231-292 7 TRCYMIMNWMD  508J CENTURYLINK COMMUNICATIONS, LLC 348   2015-09-19   
231-292 8 WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2014-09-14   
231-292 9 GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2013-03-18   
231-500 A GDRPMIBL04Z  543C ONVOY, LLCV - MI 348      
231-500 0 GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2019-12-11   
231-500 1 GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2022-12-02   
231-500 3 GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-03-06   
231-500 4 GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2021-03-06   
231-500 5 GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2019-12-11   
231-500 6 GDRPMIBL06Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 348   2023-08-02   
231-500 7 MSKGMIXKQMD  624H ONVOY SPECTRUM, LLC 348   2021-06-20   
231-500 8   145J TERRA NOVA TELECOM INC. 348   2025-07-12   
231-500 9 GDRPMIBL04Z  543C ONVOY, LLCV - MI 348   2023-08-06   
231-893 A WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-894 A WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-894 0   792K CHARTER IP ENABLED SERVICES, LLC 348   2007-02-25   
231-894 1 WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-894 2 WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-894 3 WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-894 4 WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-894 5 WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-894 6 WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-894 7 WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-894 8 WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-894 9 WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-981 A WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-981 0 GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2004-11-14   
231-981 1 GDRPMIBLXTZ  3535 ACD TELECOM, INC. - MI 348   2005-02-18   
231-981 2 WYNGMIKAGT2  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 348   2005-02-24   
231-981 3 WHTHMIXGDS0  0695 FRONTIER NORTH, INC. - MI 348      
231-981 4   817J INTERACTIVE SERVICES NETWORK, INC. 348   2005-09-02   
231-981 5 GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2006-01-05   
231-981 6 GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2006-12-11   
231-981 7 GDRPMIQLX5Y  6120 LEVEL 3 COMMUNICATIONS, LLC - MI 348   2006-12-11   
231-981 8 GDRPMIBL00Z  991E BANDWIDTH.COM CLEC, LLC - MI 348   2009-03-07   
231-981 9 GDRPMIBL40Z  318J COMCAST IP PHONE, LLC 348   2008-12-26   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.