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

K4LFL callsign genealogy

Currently held by SHEFFIELD, MARK E

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 K4LFL's current licensee, walking backwards.

  1. N0LFactive
    The Radio Active GroupNEgranted 2022-03-05
  2. KF0HXFcancelled
    The Radio Active GroupNEgranted 2022-02-14cancelled 2022-03-05

Successor callsigns

Callsigns held now by people who previously held K4LFL.

No current licensee on record previously held this callsign.

← Back to K4LFL License history →