1990 - 1994
Citizens Telecommunications Company of Montana did not exist as an operating company. 1995
Citizens Telecommunications Company of Montana became a new operating company and study area jurisdiction when it acquired the study area from GTE (GTMT) on 12/1/1994.
COSA |
Effect | CTMT | New operating company and study area COSA created when transferred control from GTE (GTMT). |
1996 - 1999
Citizens Telecommunications Company of Montana had no changes during this period. 2000
During this period, Citizens purchased study areas and exchanges from a number of ILECs, which required it to reorganize its corporate structure. Citizens Telecommunications Company of Montana, formerly an operating company/study area was, disaggregated into a separate operating company and study area. The study area continued with the original COSA (CTMT) and the operating company was given a new COSA (CTMC).
COSA |
Effect | CTMC | New operating company COSA. | CTMT | Changed from an operating company/study area to a study area, renamed CTC of Montana – Rocky Mountain. |
2001 - 2009
Citizens Telecommunications Company of Montana had no changes during this period. | 
