Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4IVW callsign genealogy
Currently held by CABALLERO, CARLOS F
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 N4IVW's current licensee, walking backwards.
- Caballero, Carlos FFLgranted 2020-12-22cancelled 2021-01-19
Successor callsigns
Callsigns held now by people who previously held N4IVW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4IVW, oldest first.
- CABALLERO, CARLOS F FL1999-10-20 → cancelled 2011-10-21
- Caballero, Carlos F FL2021-01-19 active