Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9ALK callsign genealogy
Currently held by Krelwitz, Allen J
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 W9ALK's current licensee, walking backwards.
- Krelwitz, Allen JWIgranted 2019-01-31cancelled 2019-03-01
Successor callsigns
Callsigns held now by people who previously held W9ALK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9ALK, oldest first.
- KELLER, ARLENE L MI2000-08-29 → cancelled 2012-08-30
- Krelwitz, Allen J WI2019-03-01 active