Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK1X callsign genealogy
Currently held by Griswold, John A
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 KK1X's current licensee, walking backwards.
- Griswold, John AMAgranted 2001-08-23cancelled 2006-01-10
Successor callsigns
Callsigns held now by people who previously held KK1X.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KK1X, oldest first.
- BLATTNER, LIONEL R FL1994-01-18 → cancelled 1998-10-11
- Griswold, John A MA2025-12-06 active