Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4HSO callsign genealogy
Currently held by Lehto, Edwin H
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 K4HSO's current licensee, walking backwards.
- Lehto, Edwin HTNgranted 1993-01-12cancelled 2001-07-14
Successor callsigns
Callsigns held now by people who previously held K4HSO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4HSO, oldest first.
- COURTNEY, GORDON C TN1999-06-04 → cancelled 2000-02-05
- Lehto, Edwin H TN2021-08-14 active