Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5OSP callsign genealogy
Currently held by Case, Robert E
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 K5OSP's current licensee, walking backwards.
- Case, Robert ELAgranted 2025-07-10cancelled 2025-07-29
Successor callsigns
Callsigns held now by people who previously held K5OSP.
No current licensee on record previously held this callsign.