Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4RTB callsign genealogy
Currently held by WESTHORP, DAVID C
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 N4RTB's current licensee, walking backwards.
- WESTHORP, DAVID CTNgranted 2024-06-14cancelled 2024-11-19
Successor callsigns
Callsigns held now by people who previously held N4RTB.
All historical holders
Every license row we've seen with the callsign N4RTB, oldest first.
- CONLEE, DON T TX2007-07-12 → cancelled 2017-06-20
- WESTHORP, DAVID C TN2024-11-19 → cancelled 2026-06-02