Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA4ROB callsign genealogy
Currently held by CLARK, WILLIAM H
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 WA4ROB's current licensee, walking backwards.
- BRUMBACH II, ROBERT MKYgranted 2012-07-06cancelled 2013-11-09
Successor callsigns
Callsigns held now by people who previously held WA4ROB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA4ROB, oldest first.
- CLARK, WILLIAM H TN1991-04-02 → cancelled 2003-04-03
- Brumbach II, Robert M TN2023-10-17 active