Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4YFO callsign genealogy
Currently held by PARRISH, NICKOLAS C
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 K4YFO's current licensee, walking backwards.
- PARRISH, NICKOLAS CTXgranted 2015-01-21cancelled 2023-08-22
Successor callsigns
Callsigns held now by people who previously held K4YFO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4YFO, oldest first.
- Parrish, Kenneth N FL2006-01-09 → cancelled 2018-04-04
- PARRISH, NICKOLAS C TX2023-08-22 active