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.
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Brooklyn, MI

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
517-592 A BRKLMIXIDS0  4417 FRONTIER COMMUNICATIONS OF MICHIGAN, INC. 346      
517-938 A MDTPMICODS0  3535 ACD TELECOM, INC. - MI 346      
517-938 0 LNNGMIMNX5Z  543C ONVOY, LLC - MI 346   2018-10-12   
517-938 5   318J COMCAST IP PHONE LLC 346   2015-03-19   
517-938 6 LNNGMIMNX8Z  770E TELEPORT COMMUNICATIONS AMERICA, LLC - MI 346   2014-02-07   
517-938 7 LNNGMIMNXQZ  7575 CENTURYLINK COMMUNICATIONS LLC 346   2016-01-25   
517-938 8   318J COMCAST IP PHONE LLC 346   2007-07-05   

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

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