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

AC9PS callsign genealogy

Currently held by Krotzman, Brian 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 AC9PS's current licensee, walking backwards.

  1. W2SOOcancelled· E
    Krotzman, Brian JWIgranted 2013-05-31cancelled 2017-03-03
  2. K9BJKcancelled· G
    Krotzman, Brian JWIgranted 2007-03-13cancelled 2013-05-31
  3. KC9IGFcancelled· G
    Krotzman, Brian JWIgranted 2005-09-30cancelled 2007-03-13

Successor callsigns

Callsigns held now by people who previously held AC9PS.

No current licensee on record previously held this callsign.

← Back to AC9PS License history →