Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1GCY callsign genealogy
Currently held by Guo, Congyu
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 K1GCY's current licensee, walking backwards.
- Guo, CongyuMOgranted 2015-08-03cancelled 2015-08-22
Successor callsigns
Callsigns held now by people who previously held K1GCY.
- Guo, CongyuMOgranted 2018-07-10