Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4JRO callsign genealogy
Currently held by SHACKELFORD, WILLIAM R
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 N4JRO's current licensee, walking backwards.
- Rodriguez Ortiz, JoseFLgranted 2013-10-17cancelled 2013-12-13
Successor callsigns
Callsigns held now by people who previously held N4JRO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4JRO, oldest first.
- SHACKELFORD, WILLIAM R NC1994-11-18 → cancelled 2006-11-21
- Rodriguez Ortiz, Jose FL2023-12-23 active