Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9COB callsign genealogy
Currently held by Schuler, Jacob L
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 W9COB's current licensee, walking backwards.
- Schuler, Jacob LMAgranted 2026-04-25cancelled 2026-05-16
Successor callsigns
Callsigns held now by people who previously held W9COB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9COB, oldest first.
- NOWAK, ADOLPH F IL1997-02-26 → cancelled 2009-02-27
- Schuler, Jacob L MA2026-05-16 active