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

W4KLR callsign genealogy

Currently held by Merck, Ryan 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 W4KLR's current licensee, walking backwards.

  1. N4WZMcancelled· E
    Allen, CodyFLgranted 2017-09-02cancelled 2025-08-22
  2. KN4FFWcancelled· G
    Allen, CodyFLgranted 2017-08-14cancelled 2017-09-02

Successor callsigns

Callsigns held now by people who previously held W4KLR.

  1. KB4HQXcancelled· T
    Merck, Ryan DMAgranted 2016-01-09cancelled 2016-03-15

All historical holders

Every license row we've seen with the callsign W4KLR, oldest first.

  • Merck, Ryan D FL
    2004-10-19 → cancelled 2006-03-07
  • CASKEY, DONALD T FL
    2021-07-27 active
← Back to W4KLR License history →