Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KI7MM callsign genealogy
Currently held by Campbell Jr, David S
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KI7MM's current licensee, walking backwards.
- Campbell Jr, David SAZgranted 2020-07-27cancelled 2020-12-05
Successor callsigns
Callsigns held now by people who previously held KI7MM.
- TOWNSEND, HARRISONCAgranted 2015-05-12
All historical holders
Every license row we've seen with the callsign KI7MM, oldest first.
- TOWNSEND, HARRISON CA2006-04-14 → cancelled 2015-05-12
- Campbell Jr, David S AZ2020-12-05 active