Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4TDA callsign genealogy
Currently held by Zimmerman, Scott 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 W4TDA's current licensee, walking backwards.
- Zimmerman, Scott DTNgranted 2021-03-05cancelled 2021-06-04
Successor callsigns
Callsigns held now by people who previously held W4TDA.
No current licensee on record previously held this callsign.