Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4MRS callsign genealogy
Currently held by WOODRUFF, DONALD E
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 KB4MRS's current licensee, walking backwards.
- Lopez, NanFLgranted 2024-07-18cancelled 2025-08-09
Successor callsigns
Callsigns held now by people who previously held KB4MRS.
- Lopez, NanFLgranted 2025-08-29
All historical holders
Every license row we've seen with the callsign KB4MRS, oldest first.
- WOODRUFF, DONALD E GA1987-10-27 → cancelled 1999-10-28
- Lopez, Nan FL2025-08-09 → cancelled 2025-08-29