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

N0COS callsign genealogy

Currently held by BLANCO, MICHAEL A

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 N0COS's current licensee, walking backwards.

  1. N5GPVcancelled· G
    BLANCO 922, MICHAEL ACOgranted 2015-10-16cancelled 2019-11-19
  2. N0CNUcancelled· G
    BLANCO, MICHAEL ATXgranted 2015-09-23cancelled 2015-10-16
  3. N5NTLactive· E
    LEGRAND, NATHAN TMsgranted 2026-08-01
  4. KG5DBJcancelled· G
    LEGRAND, NATHAN TMSgranted 2014-07-08cancelled 2014-08-01

Successor callsigns

Callsigns held now by people who previously held N0COS.

  1. N0GPVcancelled· G
    BLANCO, MICHAEL ATXgranted 2024-11-22cancelled 2025-03-21

All historical holders

Every license row we've seen with the callsign N0COS, oldest first.

  • KROENUNG, GEORGE M MO
    1995-09-18 → cancelled 2007-09-19
  • BLANCO, MICHAEL A TX
    2019-11-19 → cancelled 2024-11-22
← Back to N0COS License history →