Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB4OYP callsign genealogy
Currently held by Steinmeyer III, John H
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 KB4OYP's current licensee, walking backwards.
- Steinmeyer III, John HFLgranted 2021-12-13cancelled 2021-12-31
Successor callsigns
Callsigns held now by people who previously held KB4OYP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4OYP, oldest first.
- STEINMEYER III, JOHN H FL2005-10-04 → cancelled 2017-11-29
- Steinmeyer III, John H FL2021-12-31 active