Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC0IO callsign genealogy
Currently held by Harmon Jr, Lloyd M
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 AC0IO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held AC0IO.
No current licensee on record previously held this callsign.