Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4HML callsign genealogy
Currently held by ROBERTSON, SAMUEL 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 KC4HML's current licensee, walking backwards.
- ROBERTSON, SAMUEL JMDgranted 2008-07-07cancelled 2010-07-20
Successor callsigns
Callsigns held now by people who previously held KC4HML.
- ROBERTSON, SAMUEL JMDgranted 2020-11-28
All historical holders
Every license row we've seen with the callsign KC4HML, oldest first.
- ROBERTSON, ROY A GA1988-11-15 → cancelled 2000-11-16
- ROBERTSON, SAMUEL J MD2020-04-24 → cancelled 2020-11-28