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.

Switch: TRFLMN24RS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
218-653 A Thief River Falls MN 105J GARDEN VALLEY TELEPHONE COMPANY - MN 636      
218-653 1 Thief River Falls MN 105J GARDEN VALLEY TELEPHONE COMPANY - MN 636   2017-12-28   
218-691 A Oslo MN 105J GARDEN VALLEY TELEPHONE COMPANY - MN 636   2024-03-24   
218-691 6 Oslo MN 105J GARDEN VALLEY TELEPHONE COMPANY - MN 636   2024-03-24   
218-712 4 Warren MN 105J GARDEN VALLEY TELEPHONE COMPANY - MN 636   2021-05-11   
218-960 6 Alvarado MN 105J GARDEN VALLEY TELEPHONE COMPANY - MN 636   2024-03-09   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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