Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K2JUM callsign genealogy
Currently held by Greenlinger, Jonathon 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 K2JUM's current licensee, walking backwards.
- Greenlinger, Jonathan MNYgranted 2010-01-21cancelled 2010-02-23
Successor callsigns
Callsigns held now by people who previously held K2JUM.
No current licensee on record previously held this callsign.