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Confidence: Medium · Source: FCC ULS · As of 2026-09-11

NN4TO callsign genealogy

Currently held by No Time To Operate Amateur Radio Club

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 NN4TO's current licensee, walking backwards.

  1. KN4EYWcancelled
    No Time To Operate Amateur Radio ClubSCgranted 2017-08-03cancelled 2017-08-26

Successor callsigns

Callsigns held now by people who previously held NN4TO.

  1. W4NTOactive
    No Time To Operate Amateur Radio ClubSCgranted 2019-10-08
  2. NH2Tcancelled
    USCG Contest GroupHIgranted 2010-04-02cancelled 2014-06-27

All historical holders

Every license row we've seen with the callsign NN4TO, oldest first.

  • USCG Contest Group GU
    2008-10-28 → cancelled 2010-04-02
  • No Time To Operate Amateur Radio Club SC
    2017-08-26 → cancelled 2019-10-08
← Back to NN4TO License history →