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

N1FJD callsign genealogy

Currently held by GEISLER, MARK S

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 N1FJD's current licensee, walking backwards.

  1. KA9HMA
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held N1FJD.

No current licensee on record previously held this callsign.

← Back to N1FJD License history →