Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB7ER callsign genealogy
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 AB7ER's current licensee, walking backwards.
- Sauer, Michael AMTgranted 2021-08-20cancelled 2025-12-30
Successor callsigns
Callsigns held now by people who previously held AB7ER.
- KNODEL, JON MWAgranted 2019-02-02
All historical holders
Every license row we've seen with the callsign AB7ER, oldest first.
- Sauer, Michael A MT2025-12-30 active
- —— → cancelled 1999-03-25