Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KF7CJN callsign genealogy
Currently held by BLACKSTOCK, MICHAEL K
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 KF7CJN's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KF7CJN.
- BLACKSTOCK, MICHAEL KMSgranted 2015-09-29cancelled 2017-08-18