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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

K4MJO callsign genealogy

Currently held by SIMMONS SR, SAMUEL L

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 K4MJO's current licensee, walking backwards.

  1. K4MMScancelled· T
    SIMMONS, MATTHEW MVAgranted 2021-01-01cancelled 2024-09-28
  2. KJ4BMUcancelled· T
    SIMMONS, MATTHEW MVAgranted 2008-01-22cancelled 2010-07-16

Successor callsigns

Callsigns held now by people who previously held K4MJO.

  1. W4LIPactive· E
    LIPP, ROBERT EVAgranted 2017-03-01

All historical holders

Every license row we've seen with the callsign K4MJO, oldest first.

  • SIMMONS SR, SAMUEL L VA
    2020-01-06 → cancelled 2024-08-16
  • SIMMONS, MATTHEW M VA
    2024-09-28 active
← Back to K4MJO License history →