Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI7JDB callsign genealogy
Currently held by Blackman, Jeffrey D
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 KI7JDB's current licensee, walking backwards.
- Blackman, Jeffrey DORgranted 2016-04-08cancelled 2022-09-24
Successor callsigns
Callsigns held now by people who previously held KI7JDB.
- MANJARRES, GARY BAZgranted 2016-12-12cancelled 2018-10-27
All historical holders
Every license row we've seen with the callsign KI7JDB, oldest first.
- MANJARRES, GARY B AZ2016-12-12 → cancelled 2016-12-21
- Blackman, Jeffrey D OR2022-09-24 active