Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA9POW callsign genealogy
Currently held by Knoblock, Bill 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 WA9POW's current licensee, walking backwards.
- Knoblock, Bill AINgranted 2018-03-06cancelled 2018-03-27
Successor callsigns
Callsigns held now by people who previously held WA9POW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA9POW, oldest first.
- KNOBLOCH, ARNOLD C IN1997-04-04 → cancelled 2009-04-07
- Knoblock, Bill A WV2018-03-27 active