Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3SIM callsign genealogy
Currently held by Simon, William C
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 N3SIM's current licensee, walking backwards.
- Simon, William CPAgranted 2014-09-23cancelled 2021-11-13
Successor callsigns
Callsigns held now by people who previously held N3SIM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3SIM, oldest first.
- Lamasko Jr, Frank C PA2004-12-23 → cancelled 2016-12-24
- Simon, William C PA2021-11-13 active