| University of Michigan (P25) System Updated (Updated System Description Text) | Thunderbolt | 2026-01-29 18:11:07 |
| Deleted related trunked system (Ann Arbor-Washtenaw County Government System) from subcategory: (Ann Arbor City) | Thunderbolt | 2026-01-28 16:47:05 |
| Deleted related trunked system (Ann Arbor-Washtenaw County Government System) from subcategory: (County Services) | Thunderbolt | 2026-01-28 16:45:31 |
| Agency: (Businesses, Recreations and Attractions) was updated | Thunderbolt | 2026-01-18 16:54:00 |
| Agency: (Businesses, Recreations and Attractions) was updated | Ronaldski | 2026-01-17 20:06:50 |
| Updated Subcategory: (Chelsea School District) | Thunderbolt | 2026-01-09 15:13:51 |
| Added related trunked system (Chelsea School District) to subcategory: (Chelsea School District) | Thunderbolt | 2026-01-09 15:13:43 |
| Updated Subcategory: (Chelsea School District) | Thunderbolt | 2026-01-09 15:12:54 |
| Updated Subcategory: (State of Michigan) | Thunderbolt | 2026-01-09 15:04:06 |
| Added related trunked system (Michigan's Public Safety Communications System (MPSCS)) to subcategory: (State of Michigan) | Thunderbolt | 2026-01-09 15:04:02 |
| Updated Subcategory: (Washtenaw Community College (Ann Arbor)) | Thunderbolt | 2026-01-09 15:01:59 |
| Added related trunked system (Michigan's Public Safety Communications System (MPSCS)) to subcategory: (Washtenaw Community College (Ann Arbor)) | Thunderbolt | 2026-01-09 15:01:54 |
| Updated Subcategory: (Washtenaw Community College (Ann Arbor)) | Thunderbolt | 2026-01-09 15:00:53 |
| Added related trunked system (Washtenaw Community College) to subcategory: (Washtenaw Community College (Ann Arbor)) | Thunderbolt | 2026-01-09 15:00:48 |
| Chelsea School District System Updated (Updated General System Details) | Thunderbolt | 2026-01-09 04:46:47 |
| Frequencies Updated (1) | Thunderbolt | 2026-01-09 04:14:21 |
| Frequencies Updated (2) | Thunderbolt | 2026-01-09 04:05:02 |
| Agency: (Businesses, Recreations and Attractions) was updated | Thunderbolt | 2026-01-08 02:26:13 |
| Added related trunked system (Michigan's Public Safety Communications System (MPSCS)) to subcategory: (DTE Energy: Gas) | Thunderbolt | 2026-01-08 02:26:06 |
| Agency: (Businesses, Recreations and Attractions) was updated | Thunderbolt | 2026-01-08 02:25:37 |
| Added related trunked system (Michigan's Public Safety Communications System (MPSCS)) to subcategory: (DTE Energy: Electric) | Thunderbolt | 2026-01-08 02:25:29 |
| Agency: (Businesses, Recreations and Attractions) was updated | Ronaldski | 2026-01-07 19:52:45 |
| Agency: (Businesses, Recreations and Attractions) was updated | Ronaldski | 2026-01-07 19:52:29 |
| Agency: (Businesses, Recreations and Attractions) was updated | Ronaldski | 2026-01-07 19:52:06 |
| Agency: (Businesses, Recreations and Attractions) was updated | Ronaldski | 2026-01-07 19:51:12 |
| Frequencies Deleted (1) | Ronaldski | 2026-01-07 19:43:53 |
| Frequencies Deleted (1) | Ronaldski | 2026-01-07 19:41:15 |
| Frequencies Deleted (1) | Ronaldski | 2026-01-07 19:37:23 |
| Frequencies Deleted (3) | Ronaldski | 2026-01-07 19:26:39 |
| Frequencies Deleted (1) | Ronaldski | 2026-01-07 19:24:10 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 15 talkgroups for Washtenaw County (81) Common/Interop) | Ronaldski | 2025-11-24 05:06:28 |
| Updated Subcategory: (City of Ypsilanti) | Thunderbolt | 2025-11-16 15:17:09 |
| Updated Subcategory: (City of Manchester) | Thunderbolt | 2025-11-16 15:16:36 |
| Updated Subcategory: (Ypsilanti) | Thunderbolt | 2025-11-16 15:15:48 |
| Updated Subcategory: (Village of Manchester) | Thunderbolt | 2025-11-16 14:39:25 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) Public Schools) | Ronaldski | 2025-10-11 18:43:16 |
| Agency: (Businesses, Recreations and Attractions) was updated | ericcarlson | 2025-09-20 18:06:23 |
| Agency: (Businesses, Recreations and Attractions) was updated | ericcarlson | 2025-09-20 18:05:50 |
| Agency: (Businesses, Recreations and Attractions) was updated | ericcarlson | 2025-09-20 18:05:44 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated encryption settings for 1 talkgroups for Washtenaw County (81) Common/Interop) | Ronaldski | 2025-06-22 17:09:33 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) Law Enforcement) | Ronaldski | 2025-05-11 18:26:54 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated encryption settings for 2 talkgroups for Washtenaw County (81) Law Enforcement) | Thunderbolt | 2025-05-09 01:47:35 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated encryption settings for 1 talkgroups for Washtenaw County (81) Law Enforcement) | Thunderbolt | 2025-05-09 01:03:41 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated encryption settings for 2 talkgroups for Washtenaw County (81) Law Enforcement) | Ronaldski | 2025-05-03 17:40:44 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Imported talkgroups (2 Added, 0 Updated) for Washtenaw County (81) Law Enforcement) | Ronaldski | 2025-05-03 17:40:28 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 2 talkgroups for Washtenaw County (81) Law Enforcement) | Thunderbolt | 2025-04-20 16:30:36 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) Fire-Rescue) | Ronaldski | 2025-04-20 03:02:49 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 2 talkgroups for Washtenaw County (81) Law Enforcement) | Ronaldski | 2025-04-20 02:35:59 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 19 talkgroups for Washtenaw County (81) Fire-Rescue) | Ronaldski | 2025-04-20 02:33:14 |
| Frequencies Updated (1) | Thunderbolt | 2025-04-10 16:17:18 |
| Frequencies Updated (1) | Thunderbolt | 2025-04-10 16:02:45 |
| Frequencies Imported (1) | Thunderbolt | 2025-04-10 15:59:05 |
| Added Frequency 444.625 (General Use Repeater (Willis)) | Thunderbolt | 2025-04-10 15:50:35 |
| Frequencies Updated (1) | Thunderbolt | 2025-04-10 15:47:42 |
| Frequencies Updated (1) | Thunderbolt | 2025-04-10 15:46:03 |
| Added Frequency 224.72 (KF8AU) | Thunderbolt | 2025-04-10 15:44:09 |
| Frequencies Updated (1) | Thunderbolt | 2025-04-10 15:27:40 |
| Frequencies Updated (1) | Thunderbolt | 2025-04-10 15:18:21 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) Fire-Rescue) | Ronaldski | 2025-04-10 00:50:59 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) Fire-Rescue) | Ronaldski | 2025-04-10 00:48:23 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Added Talkgroup to: Washtenaw County (81) Fire-Rescue (22463 Ann Arbor Battalion Chief's Page)) | Ronaldski | 2025-04-09 17:44:13 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 2 talkgroups for Washtenaw County (81) Public Schools) | Ronaldski | 2025-04-06 19:39:36 |
| University of Michigan (P25) System Updated (Updated 1 talkgroups for Mutual Aid/Interoperability) | Thunderbolt | 2025-03-30 10:18:30 |
| University of Michigan (P25) System Updated (Imported talkgroups (1 Added, 0 Updated) for Mutual Aid/Interoperability) | Thunderbolt | 2025-03-30 10:18:14 |
| University of Michigan (P25) System Updated (Imported talkgroups (1 Added, 0 Updated) for Mutual Aid/Interoperability) | Thunderbolt | 2025-02-28 10:13:49 |
| Agency: (Businesses, Recreations and Attractions) was updated | Thunderbolt | 2025-02-07 02:14:42 |
| Agency: (Businesses, Recreations and Attractions) was updated | Thunderbolt | 2025-02-07 02:13:08 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) Public Schools) | Thunderbolt | 2025-02-03 01:55:41 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Changed Talkgroup Category: Washtenaw County (81) Public Schools Transportation to Washtenaw County (81) Public Schools) | Thunderbolt | 2025-02-03 01:54:54 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Imported talkgroups (1 Added, 0 Updated) for Washtenaw County (81) Public Schools Transportation) | Thunderbolt | 2025-02-03 01:54:13 |
| Agency: (Businesses, Recreations and Attractions) was updated | Ronaldski | 2025-01-18 04:12:16 |
| Frequencies Deleted (2) | Ronaldski | 2025-01-18 04:07:41 |
| ComSource Michigan DMR System Updated (Updated 1 talkgroups for Business) | Ronaldski | 2025-01-11 01:05:51 |
| ComSource Michigan DMR System Updated (Added Talkgroup to: Business (102361 Danis Transport)) | Ronaldski | 2025-01-11 01:04:58 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) Hospitals) | Ronaldski | 2024-12-08 16:53:36 |
| Frequencies Updated (1) | Ronaldski | 2024-11-25 20:58:45 |
| Agency: (Businesses, Recreations and Attractions) was updated | Ronaldski | 2024-11-25 15:11:58 |
| Agency: (Businesses, Recreations and Attractions) was updated | Ronaldski | 2024-11-25 15:11:14 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated encryption settings for 2 talkgroups for Washtenaw County (81) Law Enforcement) | Thunderbolt | 2024-10-05 01:44:35 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Changed Site # 022 (Washtenaw County Simulcast) to 22 (Washtenaw County Simulcast)) | Thunderbolt | 2024-09-15 18:08:10 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Changed Site # 022 (Washtenaw County Simulcast) to 22 (Washtenaw County Simulcast)) | Thunderbolt | 2024-09-15 18:06:37 |
| ComSource Michigan DMR System Updated (Added Talkgroup to: Miscellaneous (102981 Kent County Road Work)) | Ronaldski | 2024-09-12 14:23:15 |
| ComSource Michigan DMR System Updated (Added Talkgroup Category: Miscellaneous ) | Ronaldski | 2024-09-12 14:21:37 |
| Frequencies Imported (1) | Thunderbolt | 2024-06-16 18:35:04 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) Fire-Rescue) | Thunderbolt | 2024-06-11 10:33:20 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) Fire-Rescue) | Thunderbolt | 2024-06-11 10:27:06 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) County Government) | Thunderbolt | 2024-06-11 10:25:06 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Migrated 1 talkgroup(s) away from Washtenaw County (81) Local Government) | Thunderbolt | 2024-06-11 10:23:56 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Migrated 1 talkgroup(s) to Washtenaw County (81) County Government) | Thunderbolt | 2024-06-11 10:23:56 |
| Federal Correctional Institution: Milan System Updated (Updated System Location Details) | Thunderbolt | 2024-05-23 12:33:09 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated encryption settings for 1 talkgroups for Washtenaw County (81) Law Enforcement) | Thunderbolt | 2024-05-20 11:10:17 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) Hospitals) | Ronaldski | 2024-02-07 00:56:41 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 1 talkgroups for Washtenaw County (81) Law Enforcement) | Ronaldski | 2024-01-29 23:08:31 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated 2 talkgroups for Washtenaw County (81) Law Enforcement) | Ronaldski | 2024-01-29 23:07:31 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated encryption settings for 1 talkgroups for Washtenaw County (81) Law Enforcement) | Ronaldski | 2024-01-29 23:05:38 |
| Frequencies Updated (1) | Ronaldski | 2024-01-09 15:43:02 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Updated encryption settings for 1 talkgroups for Washtenaw County (81) Law Enforcement) | Thunderbolt | 2023-12-29 01:49:42 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Imported talkgroups (1 Added, 0 Updated) for Washtenaw County (81) Law Enforcement) | Thunderbolt | 2023-12-22 13:32:33 |
| Stellantis: Chelsea Proving Grounds System Updated (Updated General System Details) | Thunderbolt | 2023-09-13 17:27:25 |
| Michigan's Public Safety Communications System (MPSCS) System Updated (Changed Site # 022 (Washtenaw County Simulcast) to 22 (Washtenaw County Simulcast)) | Thunderbolt | 2023-09-10 14:54:56 |
