Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9KRP callsign genealogy
Currently held by Cramer, Carl F
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 W9KRP's current licensee, walking backwards.
- Auerbach, DavidILgranted 2020-06-30cancelled 2021-11-30
Successor callsigns
Callsigns held now by people who previously held W9KRP.
- Cramer, Carl FWIgranted 2026-04-07
All historical holders
Every license row we've seen with the callsign W9KRP, oldest first.
- Cramer, Carl F WI2003-12-24 → cancelled 2006-05-23
- HOUGLAND, MICHAEL W IN2010-01-22 → cancelled 2019-11-11
- Auerbach, David IL2021-11-30 active