Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K2COL callsign genealogy
Currently held by Colsey, Alan B
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 K2COL's current licensee, walking backwards.
- Otsuka, TakayukiCAgranted 2025-07-17cancelled 2025-08-05
Successor callsigns
Callsigns held now by people who previously held K2COL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K2COL, oldest first.
- Colsey, Alan B NY2010-03-16 → cancelled 2022-03-17
- Otsuka, Takayuki CA2025-08-05 active