Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9JCK callsign genealogy
Currently held by Greenspun, Daniel A
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 K9JCK's current licensee, walking backwards.
- Greenspun, Daniel ANVgranted 2014-03-05cancelled 2014-04-25
Successor callsigns
Callsigns held now by people who previously held K9JCK.
No current licensee on record previously held this callsign.