Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KK4UID callsign genealogy
Currently held by Ludwig, Alfred M
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 KK4UID's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KK4UID.
- Ludwig, Alfred MTNgranted 2014-03-08cancelled 2026-03-10