Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4AVI callsign genealogy
Currently held by HARMON, RONALD W
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 N4AVI's current licensee, walking backwards.
- CORIO SR, MARK AFLgranted 2018-01-20
Successor callsigns
Callsigns held now by people who previously held N4AVI.
- CORIO SR, MARK AFLgranted 2018-01-20
All historical holders
Every license row we've seen with the callsign N4AVI, oldest first.
- HARMON, RONALD W FL1989-05-30 → cancelled 2001-05-31
- CORIO SR, MARK A FL2015-01-23 → cancelled 2018-01-20