uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-12

K3JMA callsign genealogy

Currently held by ALDERFER, JEFFREY M

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 K3JMA's current licensee, walking backwards.

  1. KR4OKactive· A
    ALDERFER, JEFFREY MPAgranted 2018-09-25

Successor callsigns

Callsigns held now by people who previously held K3JMA.

  1. KR4OKactive· A
    ALDERFER, JEFFREY MPAgranted 2018-09-25
← Back to K3JMA License history →