Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KV4DY callsign genealogy
Currently held by Herstam, William B
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 KV4DY's current licensee, walking backwards.
- HERSTAM, WILLIAM BFLgranted 1999-06-24cancelled 2000-02-01
Successor callsigns
Callsigns held now by people who previously held KV4DY.
- Herstam, William BFLgranted 2010-05-26cancelled 2022-06-14