Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA3WNB callsign genealogy
Currently held by KOSMER, ROBERT 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 WA3WNB's current licensee, walking backwards.
- KOSMER, ROBERT LPAgranted 2026-04-28cancelled 2026-05-27
Successor callsigns
Callsigns held now by people who previously held WA3WNB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA3WNB, oldest first.
- KOSMER, ROBERT L PA2014-01-03 → cancelled 2026-03-31
- KOSMER, ROBERT L PA2026-05-27 active