Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4RPG callsign genealogy
Currently held by GEISLER, ROBERT P
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 N4RPG's current licensee, walking backwards.
- Geisler, Robert PVAgranted 2012-04-05cancelled 2012-04-27
Successor callsigns
Callsigns held now by people who previously held N4RPG.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4RPG, oldest first.
- Nathan, Herbert H FL1998-06-16 → cancelled 2010-06-17
- GEISLER, ROBERT P FL2022-02-03 active