Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF7CJK callsign genealogy
Currently held by Hallenbeck, Mark F
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 KF7CJK's current licensee, walking backwards.
- Hallenbeck, Mark FWAgranted 2009-02-04cancelled 2009-05-07
Successor callsigns
Callsigns held now by people who previously held KF7CJK.
No current licensee on record previously held this callsign.