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.

NPA: 541 [Rate centres in NPA 541] [Dial plan for NPA 541]

NXX: 866

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
541-866 A Wolf Creek OR WLCKORXARS0  3401 ZIPLY FIBER OREGON, LLC DBA ZIPLY FIBER 670      
541-866 0 Wolf Creek OR   3401 ZIPLY FIBER OREGON, LLC DBA ZIPLY FIBER 670      
541-866 1 Wolf Creek OR   624H ONVOY SPECTRUM, LLC 670   2021-07-24   
541-866 2 Wolf Creek OR   3401 ZIPLY FIBER OREGON, LLC DBA ZIPLY FIBER 670      
541-866 3 Wolf Creek OR   750E ONVOY, LLC - OR 670   2017-05-31   
541-866 4 Wolf Creek OR   750E ONVOY, LLC - OR 670   2019-09-21   
541-866 5 Wolf Creek OR   826H INTEGRATED PATH COMMUNICATIONS-OREGON, LLC - OR 670   2018-08-07   
541-866 6 Wolf Creek OR   750E ONVOY, LLC - OR 670   2015-03-19   
541-866 7 Wolf Creek OR   508J CENTURYLINK COMMUNICATIONS, LLC 670   2014-09-13   
541-866 8 Wolf Creek OR   3401 ZIPLY FIBER OREGON, LLC DBA ZIPLY FIBER 670      
541-866 9 Wolf Creek OR   750E ONVOY, LLC - OR 670   2019-09-21   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.