Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB1RJO callsign genealogy
Currently held by OConnell, Robert J
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 KB1RJO's current licensee, walking backwards.
- OConnell, Robert JCTgranted 2021-04-09cancelled 2022-02-15
Successor callsigns
Callsigns held now by people who previously held KB1RJO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB1RJO, oldest first.
- SHEEHAN, RYAN C CT2008-11-12 → cancelled 2020-11-13
- OConnell, Robert J CT2022-02-15 active