uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-14

AK4MA callsign genealogy

Currently held by FROHWITTER, JOSEPH D

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 AK4MA's current licensee, walking backwards.

  1. W4FROactive· E
    Froeming, Tyler JTNgranted 2022-03-29
  2. NU6Cactive· E
    Switzer, ChristopherCAgranted 2024-05-14
  3. KO6DZUcancelled· E
    Switzer, ChristopherCAgranted 2024-03-27cancelled 2024-05-14

Successor callsigns

Callsigns held now by people who previously held AK4MA.

  1. N4AAMcancelled· E
    FROHWITTER, JOSEPH DNCgranted 2012-01-31cancelled 2014-03-15
← Back to AK4MA License history →