Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4AOB callsign genealogy
Currently held by O'Brien, Alexander
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 K4AOB's current licensee, walking backwards.
- O'Brien, AlexanderNCgranted 2026-05-19cancelled 2026-07-21
Successor callsigns
Callsigns held now by people who previously held K4AOB.
No current licensee on record previously held this callsign.