Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB6IO callsign genealogy
Currently held by O BRIEN, DANIEL P
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 AB6IO's current licensee, walking backwards.
- KM6JWno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held AB6IO.
- O BRIEN, DANIEL PORgranted 2020-08-04