Confidence: Medium · Source: FCC ULS · As of 2026-09-11
N3REF callsign genealogy
Currently held by CRUZ, JULIO V
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 N3REF's current licensee, walking backwards.
- Fellenbaum, Robert EPAgranted 2019-03-18cancelled 2019-04-09
Successor callsigns
Callsigns held now by people who previously held N3REF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3REF, oldest first.
- CRUZ, JULIO V MD1993-12-28 → cancelled 2005-12-29
- Fellenbaum, Robert E PA2019-04-09 active