Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4ZZL callsign genealogy
Currently held by BAKER, COLIN M
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 KO4ZZL's current licensee, walking backwards.
- Baker, Colin MKYgranted 2022-04-05cancelled 2022-04-21
Successor callsigns
Callsigns held now by people who previously held KO4ZZL.
- Baker, Colin MKYgranted 2022-05-17