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: 507 [Rate centres in NPA 507] [Dial plan for NPA 507]

NXX: 503

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
507-503 A Adams MN ROCHMNROUMD  184D ONVOY, LLC - MN 620      
507-503 0 Adams MN ROCHMNROXRX  073H TELNYX LLC 620   2020-06-29   
507-503 1 Adams MN ROCHMNROXQX  624H ONVOY SPECTRUM, LLC 620   2021-11-18   
507-503 2 Adams MN ROCHMNROXQX  624H ONVOY SPECTRUM, LLC 620   2021-11-18   
507-503 3 Adams MN ROCHMNROUMD  184D ONVOY, LLC - MN 620   2024-09-23   
507-503 4 Adams MN ROCHMNROXQX  624H ONVOY SPECTRUM, LLC 620   2021-06-21   
507-503 6 Adams MN ROCHMNROXQX  624H ONVOY SPECTRUM, LLC 620   2021-10-23   
507-503 7 Adams MN OWTNMNOWYMD  508J CENTURYLINK COMMUNICATIONS, LLC 620   2017-05-06   
507-503 8 Adams MN ROCHMNHI9MD  939H COMMIO, LLC 620   2023-06-01   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.