Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N3AP callsign genealogy
Currently held by SULLIVAN, HARRIS 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 N3AP's current licensee, walking backwards.
- CHABALKO, JOHNCAgranted 2017-09-02cancelled 2019-02-20
Successor callsigns
Callsigns held now by people who previously held N3AP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N3AP, oldest first.
- SULLIVAN, HARRIS M FL2006-11-28 → cancelled 2019-02-12
- CHABALKO, JOHN CA2019-02-20 active