Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3KKR callsign genealogy
Currently held by Hartley, Robert
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 W3KKR's current licensee, walking backwards.
- Hartley, Robert GPAgranted 2022-02-22cancelled 2022-07-26
Successor callsigns
Callsigns held now by people who previously held W3KKR.
- GARDNER, F PHILIPILgranted 2023-10-04
All historical holders
Every license row we've seen with the callsign W3KKR, oldest first.
- GARDNER, F PHILIP IL2006-04-14 → cancelled 2013-11-09
- Hartley, Robert PA2022-07-26 active