Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4OBI callsign genealogy
Currently held by RING, ROBERT C
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 W4OBI's current licensee, walking backwards.
- RING, ROBERT CALgranted 2020-12-31cancelled 2021-01-19
Successor callsigns
Callsigns held now by people who previously held W4OBI.
No current licensee on record previously held this callsign.