Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4SNO callsign genealogy
Currently held by SNOW, JOHN D
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 W4SNO's current licensee, walking backwards.
- Killian, Patrick JCAgranted 2022-10-13cancelled 2024-10-25
Successor callsigns
Callsigns held now by people who previously held W4SNO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4SNO, oldest first.
- SNOW, JOHN D FL2009-08-06 → cancelled 2021-09-17
- Killian, Patrick J CA2024-10-25 active