Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4CQO callsign genealogy
Currently held by HOFFMANN, ROBERT J
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 K4CQO's current licensee, walking backwards.
- HOFFMANN, ROBERT JGAgranted 2018-06-18cancelled 2018-07-07
Successor callsigns
Callsigns held now by people who previously held K4CQO.
No current licensee on record previously held this callsign.