Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W6PMO callsign genealogy
Currently held by OBrien, Pat M
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 W6PMO's current licensee, walking backwards.
- OBrien, Patrick MCAgranted 2018-03-05cancelled 2018-03-30
Successor callsigns
Callsigns held now by people who previously held W6PMO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W6PMO, oldest first.
- BAKER, DONN F CA1997-08-27 → cancelled 2009-08-28
- OBrien, Pat M CA2018-03-30 active