| Subcategory (SEMCO Energy Gas Company) deleted | Ronaldski | 2021-01-09 11:13:40 |
| Subcategory (Miscellanous) deleted | Ronaldski | 2018-03-18 14:07:30 |
| Frequencies Updated (Updated: 1, Deleted 0) for Businesses | Ronaldski | 2017-04-03 13:00:00 |
| Tagged 1 Frequencies with (Data) | Ronaldski | 2016-09-01 07:54:08 |
| Frequencies Updated (Updated: 11, Deleted 0) for All frequencies | Ronaldski | 2016-09-01 07:48:51 |
| Frequencies Updated (Updated: 1, Deleted 0) for Businesses | Ronaldski | 2016-03-15 19:31:01 |
| Frequencies Updated (Updated: 0, Deleted 2) for Businesses | Ronaldski | 2016-03-15 19:30:42 |
| Changed Subcategory Details For: Birchwood Mall (Port Huron) | Starcom21 | 2011-10-19 22:32:34 |
| Changed category from (Public Utilities 90) to (Utilities 99) | Starcom21 | 2011-10-19 22:31:59 |
