Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA5K callsign genealogy
Currently held by KNUPKE, 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 WA5K's current licensee, walking backwards.
- Katirgis, StergieNMgranted 2014-07-25cancelled 2015-04-24
Successor callsigns
Callsigns held now by people who previously held WA5K.
- KNUPKE, WILLIAM COKgranted 2010-12-21cancelled 2023-03-09
All historical holders
Every license row we've seen with the callsign WA5K, oldest first.
- KNUPKE, WILLIAM C OK1996-11-04 → cancelled 2001-03-16
- Salch, Jeremy S TX2003-04-05 → cancelled 2015-04-07
- Katirgis, Stergie NM2025-02-11 active