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

K1OTL callsign genealogy

Currently held by Mazzella, Fred

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 K1OTL's current licensee, walking backwards.

  1. KI7IGFcancelled· G
    Mazzella, FredAZgranted 2016-12-13cancelled 2020-06-05
  2. KC0ZMVcancelled· G
    Mazzella, FredWAgranted 2007-02-14cancelled 2016-11-11

Successor callsigns

Callsigns held now by people who previously held K1OTL.

  1. AI7PCactive· E
    Mazzella, FredAZgranted 2020-06-05
← Back to K1OTL License history →