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Confidence: Medium · Source: FCC ULS · As of 2026-09-12

AD4XT callsign genealogy

Currently held by KOLLER, ROGER L

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 AD4XT's current licensee, walking backwards.

  1. KX4BJcancelled· E
    Whittington, Steve SGAgranted 2014-10-27cancelled 2017-03-17
  2. KM4FIJcancelled· E
    Whittington, Steve SGAgranted 2014-10-27cancelled 2017-02-24

Successor callsigns

Callsigns held now by people who previously held AD4XT.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign AD4XT, oldest first.

  • KOLLER, ROGER L FL
    1994-10-05 → cancelled 2006-02-09
  • Whittington, Steve S GA
    2017-03-17 active
← Back to AD4XT License history →