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

W3ZO callsign genealogy

Currently held by RAINER, ROBERT

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 W3ZO's current licensee, walking backwards.

  1. W3LILcancelled· E
    RAINER, ROBERTPAgranted 2022-09-13cancelled 2023-08-25
  2. KC3USJcancelled· G
    RAINER, ROBERTPAgranted 2022-08-24cancelled 2022-09-13

Successor callsigns

Callsigns held now by people who previously held W3ZO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W3ZO, oldest first.

  • WIRELESS CLUB MI
    1997-07-11 → cancelled 1999-06-23
  • ZEKIAH SWAMP VHF SOCIETY MD
    2012-07-12 → cancelled 2023-07-14
  • RAINER, ROBERT PA
    2023-08-25 active
← Back to W3ZO License history →