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

KC0YAF callsign genealogy

Currently held by Krebs, Aaron J

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 KC0YAF's current licensee, walking backwards.

  1. K0AJKactive· E
    Komarek, Anthony JMNgranted 2026-05-22
  2. KF0PNNcancelled· E
    Komarek, Anthony JMNgranted 2024-03-16cancelled 2026-05-22

Successor callsigns

Callsigns held now by people who previously held KC0YAF.

  1. K0YAFactive· G
    Krebs, Aaron JWYgranted 2026-03-17
  2. K0AJKcancelled· G
    Krebs, Aaron JCOgranted 2014-08-16cancelled 2014-09-23

All historical holders

Every license row we've seen with the callsign KC0YAF, oldest first.

  • Krebs, Aaron J CO
    2006-06-21 → cancelled 2014-08-16
  • Krebs, Aaron J CO
    2014-09-23 → cancelled 2016-06-14
← Back to KC0YAF License history →