Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0COB callsign genealogy
Currently held by HALL, JAMES 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 W0COB's current licensee, walking backwards.
- OBrien, Christopher LCAgranted 2021-06-22cancelled 2022-03-01
Successor callsigns
Callsigns held now by people who previously held W0COB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0COB, oldest first.
- HALL, JAMES T CO1988-03-22 → cancelled 2000-03-23
- OBRIEN, CHRISTOPHER L CA2022-03-01 active