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

KR7F callsign genealogy

Currently held by NIEMANN, ALVIN H

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 KR7F's current licensee, walking backwards.

  1. N7IFOcancelled· E
    Walser, Donald JAZgranted 2018-07-24cancelled 2024-05-21
  2. K1CQXactive· T
    Chen, QiangWAgranted 2022-09-03
  3. KK7HUUcancelled· T
    Chen, QiangWAgranted 2022-08-16cancelled 2022-09-03

Successor callsigns

Callsigns held now by people who previously held KR7F.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign KR7F, oldest first.

  • NIEMANN, ALVIN H WA
    1996-03-21 → cancelled 1999-07-14
  • Doyle, Drake B WA
    2012-03-16 → cancelled 2024-05-01
  • Walser, Donald J AZ
    2024-05-21 active
← Back to KR7F License history →