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: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
507-257 A Eagle Lake MN EGLKMNXERS2  1375 CONSOLIDATED COMMUNICATIONS MID-COM COMPANY - MN 620      
507-257 0 Eagle Lake MN   184D ONVOY, LLC - MN 620   2023-08-20   
507-257 1 Eagle Lake MN   1375 CONSOLIDATED COMMUNICATIONS MID-COM COMPANY - MN 620      
507-257 2 Eagle Lake MN   145J TERRA NOVA TELECOM INC. 620   2026-01-09   
507-257 3 Eagle Lake MN   1375 CONSOLIDATED COMMUNICATIONS MID-COM COMPANY - MN 620      
507-257 5 Eagle Lake MN   1375 CONSOLIDATED COMMUNICATIONS MID-COM COMPANY - MN 620      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.