Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N7FRO callsign genealogy
Currently held by ZUMMACH, AUDREY A
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 N7FRO's current licensee, walking backwards.
- Renfro, Steve GIDgranted 2020-11-12cancelled 2020-12-01
Successor callsigns
Callsigns held now by people who previously held N7FRO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7FRO, oldest first.
- ZUMMACH, AUDREY A OR1998-05-22 → cancelled 2010-05-25
- Renfro, Steve G ID2020-12-01 active