Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KQ4CQO callsign genealogy
Currently held by Caldwell Jr., Marvin D
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 KQ4CQO's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KQ4CQO.
- Caldwell Jr., Marvin DGAgranted 2023-04-11