Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4ZUM callsign genealogy
Currently held by York County Public Safety Communications Amateur Radio Group
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 KJ4ZUM'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 KJ4ZUM.
- W4PSCactiveYork County Department Of Public Safety CommunicationsSCgranted 2021-04-27