Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KB4ST callsign genealogy
Currently held by Rowe, Steven D
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 KB4ST's current licensee, walking backwards.
- Rowe, Steven DFLgranted 2014-06-12cancelled 2014-08-16
Successor callsigns
Callsigns held now by people who previously held KB4ST.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4ST, oldest first.
- GRUBBS, OLIVER L FL1994-07-14 → cancelled 2006-07-15
- Rowe, Steven D FL2025-09-16 active