Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4JJR callsign genealogy
Currently held by Giese, Robert H
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 KJ4JJR's current licensee, walking backwards.
- Giese, Robert HTNgranted 2009-01-15cancelled 2009-02-11
Successor callsigns
Callsigns held now by people who previously held KJ4JJR.
- Giese, Robert HTNgranted 2018-10-18