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

N3ADR callsign genealogy

Currently held by CLIFT, HAROLD V

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 N3ADR's current licensee, walking backwards.

  1. W3TPWcancelled· G
    Da Costa Roque, Alexander JMAgranted 2019-09-10cancelled 2019-09-28
  2. KC1LILcancelled· G
    Da Costa Roque, Alexander JMAgranted 2019-04-18cancelled 2019-09-10

Successor callsigns

Callsigns held now by people who previously held N3ADR.

  1. K1CVBcancelled· G
    da Costa Roque, Alexander JMAgranted 2019-12-17cancelled 2021-11-27

All historical holders

Every license row we've seen with the callsign N3ADR, oldest first.

  • CLIFT, HAROLD V MD
    1994-12-12 → cancelled 2006-12-13
  • Da Costa Roque, Alexander J MA
    2019-09-28 → cancelled 2019-12-17
← Back to N3ADR License history →