Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4LLM callsign genealogy
Currently held by Riccio, Robert
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 K4LLM's current licensee, walking backwards.
- Riccio, RobertALgranted 2021-07-19cancelled 2021-10-08
Successor callsigns
Callsigns held now by people who previously held K4LLM.
No current licensee on record previously held this callsign.