Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4TH callsign genealogy
Currently held by Cheadle, Geoffrey
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 AI4TH's current licensee, walking backwards.
- Hall III, Lloyd TVAgranted 2020-09-21cancelled 2024-05-31
Successor callsigns
Callsigns held now by people who previously held AI4TH.
- Cheadle, GeoffreyDCgranted 2007-03-06cancelled 2019-03-07
All historical holders
Every license row we've seen with the callsign AI4TH, oldest first.
- Cheadle, Geoffrey VA2007-02-12 → cancelled 2007-03-06
- Hall III, Lloyd T VA2024-05-31 active