Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AA1I callsign genealogy
Currently held by Isham, John D
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 AA1I's current licensee, walking backwards.
- Isham, John DMAgranted 2003-07-09cancelled 2010-04-09
Successor callsigns
Callsigns held now by people who previously held AA1I.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA1I, oldest first.
- CROWELL, ALAN MA1998-03-19 → cancelled 2010-03-20
- Isham, John D MA2020-02-11 active