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: 844

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
507-844 A St Charles MN ROCHMNROXVX  965H FRACTEL, LLC 620      
507-844 2 St Charles MN ROCHMNROXQX  624H ONVOY SPECTRUM, LLC 620   2021-10-23   
507-844 3 St Charles MN ROCHMNROXQX  624H ONVOY SPECTRUM, LLC 620   2021-10-23   
507-844 4 St Charles MN ROCHMNROXVX  965H FRACTEL, LLC 620   2020-12-11   
507-844 6 St Charles MN ROCHMNROXAX  8405 TELEPORT COMMUNICATIONS AMERICA, LLC - MN 620   2022-07-11   
507-844 7 St Charles MN ROCHMNROXQX  624H ONVOY SPECTRUM, LLC 620   2021-06-21   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.