Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W3PPP callsign genealogy
Currently held by Horn, John 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 W3PPP's current licensee, walking backwards.
- Horn, John MPAgranted 2021-04-16cancelled 2021-05-07
Successor callsigns
Callsigns held now by people who previously held W3PPP.
No current licensee on record previously held this callsign.