Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO4TLQ callsign genealogy
Currently held by Schaller IV, Frederick 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 KO4TLQ'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 KO4TLQ.
- Schaller IV, Frederick JNYgranted 2021-10-15