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.

Carlton, OR

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
503-852 A CRTOORXARS0  4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 672      
503-852 0   4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 672      
503-852 1   076F BANDWIDTH.COM CLEC, LLC - OR 672   2008-11-29   
503-852 2   750E ONVOY, LLC - OR 672   2019-11-08   
503-852 3   318J COMCAST IP PHONE, LLC 672   2006-05-07   
503-852 4   3234 LEVEL 3 COMMUNICATIONS, LLC - OR 672   2019-06-02   
503-852 5   750E ONVOY, LLC - OR 672   2018-12-06   
503-852 6   4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 672      
503-852 7   4520 UNITED TELEPHONE - NORTHWEST DBA CENTURYLINK - OR 672      
503-852 8   508J CENTURYLINK COMMUNICATIONS, LLC 672   2013-11-27   
503-852 9   750E ONVOY, LLC - OR 672   2019-11-08   
971-758 A PTLDOR13X8X  965H FRACTEL, LLC 672      
971-758 0   073H TELNYX LLC 672   2022-08-30   
971-758 1   750E ONVOY, LLC - OR 672   2023-09-16   
971-758 4   750E ONVOY, LLC - OR 672   2021-03-05   
971-758 5   750E ONVOY, LLC - OR 672   2021-03-05   
971-758 6   965H FRACTEL, LLC 672   2020-09-12   
971-758 8   145J TERRA NOVA TELECOM INC. 672   2025-07-12   

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

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.