Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4IOT callsign genealogy
Currently held by CLARK, THOMAS M
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 N4IOT's current licensee, walking backwards.
- SNOW, DONALD LVAgranted 2012-04-16cancelled 2013-03-22
Successor callsigns
Callsigns held now by people who previously held N4IOT.
- SNOW, DONALD LVAgranted 2017-09-19
All historical holders
Every license row we've seen with the callsign N4IOT, oldest first.
- CLARK, THOMAS M FL1988-01-12 → cancelled 2000-01-13
- SNOW, DONALD L VA2013-03-22 → cancelled 2017-09-19