Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB0SMF callsign genealogy
Currently held by KIEFER SR, LARRY G
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 WB0SMF's current licensee, walking backwards.
- Kiefer III, Larry GMOgranted 2019-10-22cancelled 2019-11-13
Successor callsigns
Callsigns held now by people who previously held WB0SMF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WB0SMF, oldest first.
- KIEFER SR, LARRY G MO1989-01-24 → cancelled 2001-01-25
- Kiefer III, Larry G MO2019-11-13 active