Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4RDF callsign genealogy
Currently held by MOHRKE, ARTURO
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 N4RDF's current licensee, walking backwards.
- Gearhart, Raymond JTNgranted 2019-06-21cancelled 2020-04-10
Successor callsigns
Callsigns held now by people who previously held N4RDF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4RDF, oldest first.
- MOHRKE, ARTURO FL2007-07-24 → cancelled 2019-06-12
- Gearhart, Raymond J TN2020-04-10 active