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

W6SFO callsign genealogy

Currently held by RATTO, JOHN W

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 W6SFO's current licensee, walking backwards.

  1. W7GTIcancelled· E
    George, PhilORgranted 2013-04-05cancelled 2018-07-06
  2. NW7Nactive· E
    Bogstie, Jason PWYgranted 2025-04-08
  3. K7BOGactive· G
    STONE, LUCAS DUTgranted 2023-01-24
  4. KK4MCZcancelled· G
    STONE, LUCAS DUTgranted 2023-01-04cancelled 2023-01-24

Successor callsigns

Callsigns held now by people who previously held W6SFO.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W6SFO, oldest first.

  • RATTO, JOHN W CA
    2006-04-07 → cancelled 2018-06-19
  • Renault, Phil TX
    2018-07-06 active
← Back to W6SFO License history →