Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1SSS callsign genealogy
Currently held by KOERNER, LEO A
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 W1SSS's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W1SSS.
- SPARKS, STEVEN SMOgranted 2016-09-20
All historical holders
Every license row we've seen with the callsign W1SSS, oldest first.
- SPARKS, STEVEN S MO2012-06-20 → cancelled 2016-09-20
- KOERNER, LEO A MA2020-08-01 active