uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-14

N4OQK callsign genealogy

Currently held by DAY, MARK A

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 N4OQK's current licensee, walking backwards.

  1. KB4TXJ
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held N4OQK.

No current licensee on record previously held this callsign.

← Back to N4OQK License history →