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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

K6CWO callsign genealogy

Currently held by Tolentino, Ian D

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 K6CWO's current licensee, walking backwards.

  1. WO4RCAcancelled· G
    Tolentino, Ian DCAgranted 2012-11-27cancelled 2014-01-11
  2. K6RSQactive· T
    Cowan Sr, Scott ETXgranted 2015-09-18
  3. KK6WDQcancelled· T
    Cowan Sr, Scott ECAgranted 2015-08-31cancelled 2015-09-18

Successor callsigns

Callsigns held now by people who previously held K6CWO.

  1. K5CWOcancelled· E
    Mata, RolandTXgranted 2005-01-08cancelled 2006-01-10

All historical holders

Every license row we've seen with the callsign K6CWO, oldest first.

  • MATA, ROLAND TX
    2000-03-17 → cancelled 2005-01-08
  • Tolentino, Ian D CA
    2024-01-03 active
← Back to K6CWO License history →