Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9LSO callsign genealogy
Currently held by OTTO, LESLIE S
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 W9LSO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W9LSO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9LSO, oldest first.
- HOTCHKISS, ALLEN R NC1997-03-05 → cancelled 2009-03-06
- OTTO, LESLIE S IL2021-12-10 active