About Range Range Telephone Cooperative, Inc. “Range” is a local exchange carrier providing telecommunication services to southeastern Montana and northeastern Wyoming. Established in 1953 as a non-profit cooperative, Range currently serves over 6,000 subscribers in eighteen telephone exchanges. Included in that area are the six Montana counties of Rosebud, Treasure, Custer, Powder River, Carter, and Big Horn, and the five Wyoming counties of Campbell, Johnson, Weston, Sheridan, and Crook.