Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7OSI callsign genealogy
Currently held by Felt, Sharrol T
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 W7OSI's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held W7OSI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7OSI, oldest first.
- Felt, Sharrol T UT2005-03-22 → cancelled 2017-05-04
- Falk, Kenneth J WA2017-05-31 active