Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9UL callsign genealogy
Currently held by ATTERBERG, STEVEN E
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 K9UL's current licensee, walking backwards.
- ASAKURA, ALAN GHIgranted 2015-10-20
- CHING, DELWYN WHIgranted 2023-08-17
- Takeda, ShojiHIgranted 2016-06-21cancelled 2017-09-12
- Takeda, ShojiHIgranted 2014-07-19cancelled 2016-06-21
- Takeda, ShojiHIgranted 2004-10-15cancelled 2004-11-19
Successor callsigns
Callsigns held now by people who previously held K9UL.
No current licensee on record previously held this callsign.