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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Prospect, OR

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
541-560 A PRSPORXXRS0  4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 670      
541-560 0   4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 670      
541-560 1   4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 670      
541-560 2   4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 670      
541-560 3   4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 670      
541-560 4   4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 670      
541-560 5   750E ONVOY, LLC - OR 670   2021-08-13   
541-560 6   508J CENTURYLINK COMMUNICATIONS, LLC 670   2014-04-15   
541-560 7   3234 LEVEL 3 COMMUNICATIONS, LLC - OR 670   2023-02-20   
541-560 8   4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 670      
541-560 9   4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 670      

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

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