Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5SLO callsign genealogy
Currently held by MORRISON, ROBERT 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 W5SLO's current licensee, walking backwards.
- Williamson, John DTXgranted 2025-02-13cancelled 2025-03-04
Successor callsigns
Callsigns held now by people who previously held W5SLO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5SLO, oldest first.
- MORRISON, ROBERT E FL1999-04-13 → cancelled 2011-04-14
- Williamson, John D TX2025-03-04 active