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.
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OCN: 105J GARDEN VALLEY TELEPHONE COMPANY - MN

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
218-551 4 Crookston MN RLFLMNXR25G  636   2021-05-11   
218-653 A Thief River Falls MN TRFLMN24RS0  636      
218-653 1 Thief River Falls MN TRFLMN24RS0  636   2017-12-28   
218-691 A Oslo MN TRFLMN24RS0  636   2024-03-24   
218-691 6 Oslo MN TRFLMN24RS0  636   2024-03-24   
218-712 4 Warren MN TRFLMN24RS0  636   2021-05-11   
218-793 6 East Grand Forks MN RLFLMNXR25G  636   2024-03-09   
218-902 9 Mahnomen MN WNGRMNXWRS0  636   2018-03-12   
218-960 6 Alvarado MN TRFLMN24RS0  636   2024-03-09   

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

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