Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ASB callsign genealogy
Currently held by SCHUMACHER, HAROLD
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 K4ASB's current licensee, walking backwards.
- Stephens, Billy WTNgranted 2006-10-18cancelled 2008-06-03
Successor callsigns
Callsigns held now by people who previously held K4ASB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ASB, oldest first.
- SCHUMACHER, HAROLD KY1994-03-29 → cancelled 2006-03-30
- Stephens, Billy W TN2018-03-22 active