Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W6SEM callsign genealogy
Currently held by FARBMAN, NATHANIEL R
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 W6SEM's current licensee, walking backwards.
- Mullee, Spencer EFLgranted 2014-08-26cancelled 2014-09-13
Successor callsigns
Callsigns held now by people who previously held W6SEM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6SEM, oldest first.
- FARBMAN, NATHANIEL R CA1988-02-02 → cancelled 2000-02-03
- Mullee, Spencer E TX2024-06-29 active