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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

K4TNX callsign genealogy

Currently held by CZEPCZYNSKI, ARTUR O

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 K4TNX's current licensee, walking backwards.

  1. NH7FLcancelled· G
    CZEPCZYNSKI, ARTUR OTNgranted 2006-11-02cancelled 2012-08-07
  2. KB0ZKZcancelled· G
    CZEPCZYNSKI, ARTUR OHIgranted 1997-07-15cancelled 2001-05-18

Successor callsigns

Callsigns held now by people who previously held K4TNX.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign K4TNX, oldest first.

  • HOWALD, R L FL
    1988-07-12 → cancelled 2000-07-13
  • CZEPCZYNSKI, ARTUR O WI
    2022-08-03 active
← Back to K4TNX License history →