Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9CTR callsign genealogy
Currently held by Krueger, Charles T
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 W9CTR's current licensee, walking backwards.
- Krueger, Charles TILgranted 2014-07-22cancelled 2018-07-21
Successor callsigns
Callsigns held now by people who previously held W9CTR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9CTR, oldest first.
- KRUEGER, WALTER P IL2006-06-16 → cancelled 2018-04-06
- Krueger, Charles T IL2018-07-21 active