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

N9UO callsign genealogy

Currently held by Cardinal, Steven P

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 N9UO's current licensee, walking backwards.

  1. N7AGAcancelled· E
    ARDON, ALFRED GNEgranted 2016-05-03cancelled 2019-12-07
  2. KD7IGWcancelled· G
    ARDON, ALFRED GWAgranted 2010-01-06cancelled 2016-05-03

Successor callsigns

Callsigns held now by people who previously held N9UO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign N9UO, oldest first.

  • Cardinal, Steven P IN
    2007-11-06 → cancelled 2019-11-07
  • ARDON, ALFRED G NE
    2019-12-07 active
← Back to N9UO License history →