Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KK4ALF callsign genealogy
Currently held by Harlan, Joseph 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 KK4ALF's current licensee, walking backwards.
- Lopp, James ETNgranted 2019-03-22cancelled 2019-07-16
Successor callsigns
Callsigns held now by people who previously held KK4ALF.
- Harlan, JosephGAgranted 2021-01-23
All historical holders
Every license row we've seen with the callsign KK4ALF, oldest first.
- Harlan, Joseph D GA2011-02-22 → cancelled 2011-03-12
- Lopp, James E TN2019-07-16 active