Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4DRS callsign genealogy
Currently held by Seibert, David R
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 KJ4DRS's current licensee, walking backwards.
- Seibert, David RFLgranted 2010-05-18cancelled 2016-11-26
Successor callsigns
Callsigns held now by people who previously held KJ4DRS.
- Mester, Michael CGAgranted 2011-07-19cancelled 2023-07-20
All historical holders
Every license row we've seen with the callsign KJ4DRS, oldest first.
- Mester, Michael C GA2008-04-25 → cancelled 2011-07-19
- Seibert, David R FL2016-11-26 active