Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1SLC callsign genealogy
Currently held by RENZULLI, MICHAEL J
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 N1SLC's current licensee, walking backwards.
- Christensen, Sydney LCTgranted 2023-06-29cancelled 2023-08-01
Successor callsigns
Callsigns held now by people who previously held N1SLC.
- Casey, Stephen LALgranted 2017-06-27
All historical holders
Every license row we've seen with the callsign N1SLC, oldest first.
- RENZULLI, MICHAEL J CT1994-07-14 → cancelled 2006-07-15
- Casey, Stephen L GA2010-03-23 → cancelled 2017-06-27
- Christensen, Sydney L CT2023-08-01 active