Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4DP callsign genealogy
Currently held by KING, RONALD 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 AB4DP's current licensee, walking backwards.
- KING, RONALD DTNgranted 1999-03-03cancelled 2006-01-14
Successor callsigns
Callsigns held now by people who previously held AB4DP.
All historical holders
Every license row we've seen with the callsign AB4DP, oldest first.
- KING, RONALD D TN1999-03-03 → cancelled 2000-10-31
- KING, RONALD D TN2015-12-29 → cancelled 2023-02-28