Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI5DY callsign genealogy
Currently held by HERZLER, WILLIAM R
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 AI5DY's current licensee, walking backwards.
- HERZLER, WILLIAM RTXgranted 2018-09-18cancelled 2021-06-08
Successor callsigns
Callsigns held now by people who previously held AI5DY.
- HERZLER, WILLIAM RTXgranted 2021-09-17