Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO3I callsign genealogy
Currently held by GARREN, ROBERT 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 KO3I's current licensee, walking backwards.
- Spickes, John DDEgranted 2011-03-15cancelled 2012-03-31
Successor callsigns
Callsigns held now by people who previously held KO3I.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KO3I, oldest first.
- GARREN, ROBERT D PA1997-12-17 → cancelled 2005-02-01
- Spickes, John D DE2022-02-19 active