Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA3TMS callsign genealogy
Currently held by O DONNELL, WILLIAM 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 KA3TMS's current licensee, walking backwards.
- Strickland, Timothy MMDgranted 2017-04-05cancelled 2018-11-06
Successor callsigns
Callsigns held now by people who previously held KA3TMS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KA3TMS, oldest first.
- O DONNELL, WILLIAM J PA1990-04-17 → cancelled 2002-04-18
- Strickland, Timothy M MD2018-11-06 active