Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KL0WN callsign genealogy
Currently held by Jennings, Jay I
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 KL0WN's current licensee, walking backwards.
- Jennings, Jay IAKgranted 2002-07-27cancelled 2008-10-03
Successor callsigns
Callsigns held now by people who previously held KL0WN.
- PFEIFER, JOHN WHIgranted 2015-05-12cancelled 2021-06-04
All historical holders
Every license row we've seen with the callsign KL0WN, oldest first.
- PFEIFER, JOHN W AK1996-12-04 → cancelled 2005-06-18
- Jennings, Jay I AZ2019-04-09 active