Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI0A callsign genealogy
Currently held by Tolsdorf, David K
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 AI0A's current licensee, walking backwards.
- Tolsdorf, David KIAgranted 2012-12-12cancelled 2016-02-13
Successor callsigns
Callsigns held now by people who previously held AI0A.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AI0A, oldest first.
- ECK, ELDON J KS2003-11-03 → cancelled 2016-01-26
- Tolsdorf, David K IA2026-01-22 active