Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA4SFD callsign genealogy
Currently held by Haumesser, Walter L
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 KA4SFD's current licensee, walking backwards.
- Haumesser, Walter LFLgranted 2013-09-09cancelled 2013-09-28
Successor callsigns
Callsigns held now by people who previously held KA4SFD.
- Haumesser, Walter LFLgranted 2015-03-14