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

NI1S callsign genealogy

Currently held by SULLIVAN SR, RALPH J

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 NI1S's current licensee, walking backwards.

  1. WA1ISQcancelled· E
    CARR, JOHN JMAgranted 2013-04-20cancelled 2013-05-31
  2. N1BPVcancelled· G
    CARR, JOHN JMAgranted 1994-05-10cancelled 2003-06-20
  3. WA1WTO
    no FCC ULS record on file

Successor callsigns

Callsigns held now by people who previously held NI1S.

  1. NN4Icancelled· E
    DALTON, BOB NNCgranted 2011-01-25cancelled 2017-09-12

All historical holders

Every license row we've seen with the callsign NI1S, oldest first.

  • SULLIVAN SR, RALPH J RI
    1996-10-16 → cancelled 2008-10-17
  • DALTON, BOB N NC
    2010-04-13 → cancelled 2011-01-25
  • CARR, JOHN J MA
    2023-05-09 active
← Back to NI1S License history →