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

NU5M callsign genealogy

Currently held by ROLL, FREDERICK J

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 NU5M's current licensee, walking backwards.

  1. N5YIZcancelled· E
    MOORE, PRESTONTXgranted 2021-10-26cancelled 2025-12-09

Successor callsigns

Callsigns held now by people who previously held NU5M.

  1. N5LPactive· E
    PARDUE, LAWRENCE GNMgranted 2016-09-21
  2. WJ5Bcancelled· E
    ROLL, FREDERICK JGAgranted 2000-07-04cancelled 2001-01-20
  3. WJ5Bterminated· E
    ROLL, FREDERICK JTXgranted 1999-12-24cancelled 2000-01-10

All historical holders

Every license row we've seen with the callsign NU5M, oldest first.

  • ROLL, FREDERICK J TX
    1999-04-01 → cancelled 2000-07-04
  • CLARC CW Contest Club TX
    2013-08-15 → cancelled 2025-09-13
  • MOORE, PRESTON TX
    2025-12-09 active
← Back to NU5M License history →