Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KK4PHN callsign genealogy
Currently held by SZERSZYNSKI, ROBERT 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 KK4PHN's current licensee, walking backwards.
- KN6GOPcancelledKAPIHAN AMATEUR RADIO BROTHERHOODCAgranted 2019-12-26cancelled 2020-01-24
Successor callsigns
Callsigns held now by people who previously held KK4PHN.
- SZERSZYNSKI, ROBERT JVAgranted 2023-02-24
All historical holders
Every license row we've seen with the callsign KK4PHN, oldest first.
- SZERSZYNSKI, ROBERT J VA2013-03-11 → cancelled 2013-04-15
- KAPIHAN AMATEUR RADIO BROTHERHOOD CA2020-01-24 → cancelled 2021-10-12