Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9ZIP callsign genealogy
Currently held by Saar, John C
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 W9ZIP's current licensee, walking backwards.
- FIEDLER, ROBERT EINgranted 2017-01-14cancelled 2025-04-19
Successor callsigns
Callsigns held now by people who previously held W9ZIP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9ZIP, oldest first.
- Saar, John C WI2012-05-05 → cancelled 2024-07-10
- FIEDLER, ROBERT E IN2025-04-19 active