Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AK4D callsign genealogy
Currently held by KARLSEN, LEIF K
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 AK4D's current licensee, walking backwards.
- BROWN, TERRY MNCgranted 2009-04-21cancelled 2010-02-20
Successor callsigns
Callsigns held now by people who previously held AK4D.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AK4D, oldest first.
- KARLSEN, LEIF K WA2006-08-15 → cancelled 2008-02-01
- BROWN, TERRY M NC2019-11-25 active