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: 427

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
541-427 A Ukiah OR UKIHORXXRS0  2360 CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 672      
541-427 0 Ukiah OR   624H ONVOY SPECTRUM, LLC 672   2021-12-13   
541-427 1 Ukiah OR   624H ONVOY SPECTRUM, LLC 672   2021-12-13   
541-427 2 Ukiah OR   624H ONVOY SPECTRUM, LLC 672   2021-12-13   
541-427 3 Ukiah OR   2360 CENTURYTEL OF OREGON, INC. DBA CENTURYLINK 672      
541-427 4 Ukiah OR   750E ONVOY, LLC - OR 672   2013-01-26   
541-427 5 Ukiah OR   624H ONVOY SPECTRUM, LLC 672   2021-12-13   
541-427 6 Ukiah OR   750E ONVOY, LLC - OR 672   2013-01-26   
541-427 7 Ukiah OR   508J CENTURYLINK COMMUNICATIONS, LLC 672   2013-11-27   
541-427 8 Ukiah OR   624H ONVOY SPECTRUM, LLC 672   2021-12-13   
541-427 9 Ukiah OR   624H ONVOY SPECTRUM, LLC 672   2021-12-13   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.