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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OCN: 4125 XO COMMUNICATIONS SERVICES, INC. - MI

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
616-202 A Grand Rapids MI GDRPMIBL19Z  348      
616-202 0 Grand Rapids MI GDRPMIBL19Z  348   2013-09-19   
734-592 A New Boston MI SFLDMIWKDS2  340      
734-592 0 New Boston MI SFLDMIWKDS2  340      
734-592 1 New Boston MI SFLDMIWKDS2  340      
734-592 2 New Boston MI SFLDMIWKDS2  340      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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