Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9LIU callsign genealogy
Currently held by Liu, Allan K
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 W9LIU's current licensee, walking backwards.
- Liu, Allan KWIgranted 2017-01-09cancelled 2017-01-31
Successor callsigns
Callsigns held now by people who previously held W9LIU.
No current licensee on record previously held this callsign.