Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N5TXX callsign genealogy
Currently held by ZIMMERMANN, MICHAEL 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 N5TXX's current licensee, walking backwards.
- Zimmermann, Michael CTXgranted 2013-08-28cancelled 2014-03-11
Successor callsigns
Callsigns held now by people who previously held N5TXX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N5TXX, oldest first.
- YOUNG, HUEY M LA2001-03-12 → cancelled 2013-06-05
- ZIMMERMANN, MICHAEL C TX2024-02-08 active