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

NI4U callsign genealogy

Currently held by Hollock, Michael R

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 NI4U's current licensee, walking backwards.

  1. K3MRHcancelled· E
    Hollock, Michael RVAgranted 2017-02-14cancelled 2019-10-22
  2. KW4KOcancelled· E
    Hollock, Michael RVAgranted 2015-03-09cancelled 2017-02-14
  3. KM4IMWcancelled· E
    Hollock, Michael RVAgranted 2015-03-09cancelled 2015-06-18

Successor callsigns

Callsigns held now by people who previously held NI4U.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign NI4U, oldest first.

  • FRANCIS, DORIS A KY
    2008-12-02 → cancelled 2017-10-03
  • Hollock, Michael R VA
    2019-10-22 active
← Back to NI4U License history →