Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AK4O callsign genealogy
Currently held by JOHNSON, DAVID 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 AK4O's current licensee, walking backwards.
- DALLIS JR, ROBERT VFLgranted 2009-01-13cancelled 2010-08-20
Successor callsigns
Callsigns held now by people who previously held AK4O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AK4O, oldest first.
- JOHNSON, DAVID M GA1998-07-30 → cancelled 2010-07-31
- DALLIS JR, ROBERT V FL2020-07-01 active