Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8LO callsign genealogy
Currently held by Helder, ARIE P
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 K8LO's current licensee, walking backwards.
- Guzic, GeorgeOHgranted 2010-07-22cancelled 2010-09-08
Successor callsigns
Callsigns held now by people who previously held K8LO.
- HELDER, ARIE PMIgranted 2018-06-26
All historical holders
Every license row we've seen with the callsign K8LO, oldest first.
- BLACKWELL, BILLY T MI1997-05-16 → cancelled 2002-02-26
- Helder, ARIE P MI2006-12-23 → cancelled 2008-08-19
- Guzic, George OH2020-06-18 active