Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD8U callsign genealogy
Currently held by STELMOCK, ROBERT 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 WD8U's current licensee, walking backwards.
- STELMOCK, ROBERT JFLgranted 2010-02-10cancelled 2014-01-04
Successor callsigns
Callsigns held now by people who previously held WD8U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WD8U, oldest first.
- JOHNSTONE, WILLIAM W OH2001-10-17 → cancelled 2013-12-11
- STELMOCK, ROBERT J FL2023-12-14 active