Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4MAR callsign genealogy
Currently held by KERSHNER, FRANK L
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 N4MAR's current licensee, walking backwards.
- Juestel, MarioGAgranted 2009-12-17cancelled 2014-08-09
Successor callsigns
Callsigns held now by people who previously held N4MAR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4MAR, oldest first.
- KERSHNER, FRANK L NC2002-04-24 → cancelled 2014-07-22
- Juestel, Mario GA2024-07-06 active