Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9FO callsign genealogy
Currently held by Metro Amateur Radio Club
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 W9FO's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W9FO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9FO, oldest first.
- Borenstein, Arnold L IL2014-02-12 → cancelled 2017-03-02
- Metro Amateur Radio Club IL2017-08-05 active