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

K5UPS callsign genealogy

Currently held by CROSBY, MARK 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 K5UPS's current licensee, walking backwards.

  1. N5UZZcancelled· E
    CROSBY, MARK ATXgranted 2013-04-30cancelled 2018-03-13

Successor callsigns

Callsigns held now by people who previously held K5UPS.

  1. NM2Jcancelled· E
    TAYLOR, STEPHEN NAZgranted 2012-02-10cancelled 2018-05-04

All historical holders

Every license row we've seen with the callsign K5UPS, oldest first.

  • TAYLOR, STEPHEN N NM
    2012-01-20 → cancelled 2012-02-10
  • CROSBY, MARK A TX
    2018-03-13 active
← Back to K5UPS License history →