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

N3BO callsign genealogy

Currently held by RILEY, MICHAEL 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 N3BO's current licensee, walking backwards.

  1. KD5HBZcancelled· E
    RILEY, MICHAEL JTXgranted 1999-04-29cancelled 2006-11-07

Successor callsigns

Callsigns held now by people who previously held N3BO.

  1. W3FDexpired· E
    DAVIS, FREDERICK WTNgranted 2014-02-28cancelled 2026-05-19
  2. N3SIcancelled· E
    DAVIS, FREDERICK WMDgranted 2002-11-26cancelled 2003-01-28

All historical holders

Every license row we've seen with the callsign N3BO, oldest first.

  • DAVIS, FREDERICK W MD
    2002-09-17 → cancelled 2002-11-26
  • DAVIS, FREDERICK W MD
    2003-05-02 → cancelled 2004-05-18
  • RILEY, MICHAEL J TX
    2016-09-07 active
  • DAVIS, FREDERICK W
    — → cancelled 1999-03-11
← Back to N3BO License history →