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: 022H COMMIO, LLC

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
469-975 A Plano TX DLLSTX97TMD  552      
469-975 0 Plano TX   552   2016-09-01   
720-768 A Denver CO DNVRCO26XJX  656      
720-768 7 Denver CO   656   2018-01-05   
774-461 A Fall River MA SOVLMAAB6MD  128      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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