Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3UD callsign genealogy
Currently held by BORTZ, DANIEL 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 N3UD's current licensee, walking backwards.
- BORTZ, DANIEL CPAgranted 2022-05-13cancelled 2022-06-03
Successor callsigns
Callsigns held now by people who previously held N3UD.
- Zimmer, Robert EPAgranted 2020-05-08
All historical holders
Every license row we've seen with the callsign N3UD, oldest first.
- Tabatschkow, Paul G PA2013-05-17 → cancelled 2017-10-23
- Zimmer, Robert E PA2019-12-17 → cancelled 2020-05-08
- BORTZ, DANIEL C PA2022-06-03 active