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

W4SWW callsign genealogy

Currently held by URQUIZA, MANUEL A

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 W4SWW's current licensee, walking backwards.

  1. K1YYYcancelled· G
    BILLINGTON, William RNHgranted 2024-07-09cancelled 2026-06-06
  2. N1NVYcancelled· G
    BILLINGTON, William RNHgranted 2024-05-24cancelled 2024-07-09
  3. K5AAAactive· T
    Callahan, Kevin JTXgranted 2026-06-13
  4. KJ5PNBcancelled· T
    Callahan, Kevin JTXgranted 2026-04-14cancelled 2026-06-13

Successor callsigns

Callsigns held now by people who previously held W4SWW.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W4SWW, oldest first.

  • URQUIZA, MANUEL A CA
    1994-08-20 → cancelled 2006-08-22
  • HALLMARK, EARNEST L FL
    2020-07-28 active
← Back to W4SWW License history →