Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AI5ZH callsign genealogy
Currently held by Lehmann, Michael 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 AI5ZH's current licensee, walking backwards.
- Lehmann, Michael RTXgranted 2025-11-25cancelled 2025-12-01
Successor callsigns
Callsigns held now by people who previously held AI5ZH.
- Lehmann, Michael RTXgranted 2025-12-20