Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA4POP callsign genealogy
Currently held by Harlan, Joseph
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 KA4POP's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KA4POP.
No current licensee on record previously held this callsign.