Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9AAT callsign genealogy
Currently held by Cahill, Tom 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 W9AAT's current licensee, walking backwards.
- Cahill, Tom MILgranted 2022-07-19cancelled 2024-06-21
Successor callsigns
Callsigns held now by people who previously held W9AAT.
- SKYBA, ROMANILgranted 2017-08-11
All historical holders
Every license row we've seen with the callsign W9AAT, oldest first.
- SKYBA, ROMAN IL2017-01-18 → cancelled 2017-08-11
- Cahill, Tom M IL2024-06-21 active