Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5OFS callsign genealogy
Currently held by GROSSENBACHER, GLENN 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 K5OFS's current licensee, walking backwards.
- GROSSENBACHER, GLENN TWAgranted 2016-01-27cancelled 2016-02-17
Successor callsigns
Callsigns held now by people who previously held K5OFS.
No current licensee on record previously held this callsign.