Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KR4BW callsign genealogy
Currently held by Madden, Kevin 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 KR4BW's current licensee, walking backwards.
- WATSON, ROBERT BCOgranted 2020-04-10
Successor callsigns
Callsigns held now by people who previously held KR4BW.
- WATSON, ROBERT BCOgranted 2020-04-10
All historical holders
Every license row we've seen with the callsign KR4BW, oldest first.
- Madden, Kevin J FL2003-10-25 → cancelled 2015-10-27
- WATSON, ROBERT B WA2017-02-28 → cancelled 2020-04-10