Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4BOA callsign genealogy
Currently held by NICHOLS, MICHAEL 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 KD4BOA's current licensee, walking backwards.
- Nichols, Michael RFLgranted 2019-10-15cancelled 2019-11-26
Successor callsigns
Callsigns held now by people who previously held KD4BOA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4BOA, oldest first.
- NICHOLS, MICHAEL R FL2002-04-23 → cancelled 2013-06-12
- Nichols, Michael R FL2019-11-26 active