Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF5JJU callsign genealogy
Currently held by Harper II, Jack M
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 KF5JJU's current licensee, walking backwards.
- Harper II, Jack MTXgranted 2010-12-14cancelled 2010-12-28
Successor callsigns
Callsigns held now by people who previously held KF5JJU.
- Harper II, Jack MTXgranted 2010-12-14cancelled 2011-02-15