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: 6118 LEVEL 3 COMMUNICATIONS, LLC - CO

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NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
970-993 2 Marvel CO DNVTCO56DS8  656   2023-03-05   
970-997 8 Kremmling CO DNVTCO56DS8  656   2023-01-06   
970-998 5 McCoy CO DNVTCO56DS8  656   2023-03-05   

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Last updated: Mon, 15 Sep 2025 02:24:40 UTC

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