Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WR4TH callsign genealogy
Currently held by RATHMANN, MICHAEL
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 WR4TH's current licensee, walking backwards.
- RATHMANN, MICHAELVAgranted 2022-06-07cancelled 2024-10-12
Successor callsigns
Callsigns held now by people who previously held WR4TH.
No current licensee on record previously held this callsign.