Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD5VL callsign genealogy
Currently held by WOLFF, HELMUT O
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 KD5VL's current licensee, walking backwards.
- Lauterborn, VivienMAgranted 2017-07-20cancelled 2017-08-08
Successor callsigns
Callsigns held now by people who previously held KD5VL.
- WOLFF, HELMUT OTXgranted 2010-08-07cancelled 2022-10-25
All historical holders
Every license row we've seen with the callsign KD5VL, oldest first.
- WOLFF, HELMUT O TX1997-10-14 → cancelled 2000-10-24
- Lauterborn, Vivien FL2017-08-08 active