Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1KL callsign genealogy
Currently held by Ryder, William 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 W1KL's current licensee, walking backwards.
- Wagner, Jonathan PGAgranted 2017-10-13cancelled 2020-12-29
Successor callsigns
Callsigns held now by people who previously held W1KL.
- Karpinsky, Christopher JMAgranted 2018-12-04
All historical holders
Every license row we've seen with the callsign W1KL, oldest first.
- Ryder, William C MA2007-06-06 → cancelled 2016-05-17
- Karpinsky, Christopher J MA2018-06-05 → cancelled 2018-12-04
- Wagner, Jonathan P CO2020-12-29 active