Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0TDB callsign genealogy
Currently held by Borrup, Timothy D
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 N0TDB's current licensee, walking backwards.
- Borrup, Timothy DMOgranted 2017-11-29cancelled 2018-05-11
Successor callsigns
Callsigns held now by people who previously held N0TDB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0TDB, oldest first.
- DARON, ALBERT E CO1992-06-23 → cancelled 2004-06-24
- Borrup, Timothy D MO2018-05-11 active