Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AI4RO callsign genealogy
Currently held by Schrum, Allan G
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 AI4RO's current licensee, walking backwards.
- Schrum, Allan GGAgranted 2006-07-27cancelled 2006-09-11
Successor callsigns
Callsigns held now by people who previously held AI4RO.
No current licensee on record previously held this callsign.