Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4THM callsign genealogy
Currently held by CRUZ, ROBERT W
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 W4THM's current licensee, walking backwards.
- CRUZ, ROBERT WFLgranted 2014-08-20cancelled 2019-04-23
Successor callsigns
Callsigns held now by people who previously held W4THM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4THM, oldest first.
- White Jr, Garland E VA2006-10-13 → cancelled 2019-02-12
- CRUZ, ROBERT W FL2019-04-23 active