Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4LDP callsign genealogy
Currently held by MACKEY, KEITH J
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 W4LDP's current licensee, walking backwards.
- Mackey, KeithFLgranted 2022-06-22cancelled 2022-07-15
Successor callsigns
Callsigns held now by people who previously held W4LDP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4LDP, oldest first.
- MACKEY, KEITH J FL2010-01-19 → cancelled 2022-04-16
- Mackey, Keith FL2022-07-15 active