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

W4PIN callsign genealogy

Currently held by WARREN, JEFFREY 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 W4PIN's current licensee, walking backwards.

  1. KV4XGcancelled· E
    WARREN, JEFFREY JVAgranted 2013-03-25cancelled 2015-03-13
  2. KK4PVJcancelled· E
    WARREN, JEFFREY JVAgranted 2013-03-25cancelled 2014-04-16

Successor callsigns

Callsigns held now by people who previously held W4PIN.

  1. KD4AVactive· E
    Williams, Ying PFLgranted 2022-11-30
  2. W4JJWactive· E
    WARREN, JEFFREY JVAgranted 2020-04-10

All historical holders

Every license row we've seen with the callsign W4PIN, oldest first.

  • SORENSEN, ROBERT L FL
    1993-07-20 → cancelled 2005-07-21
  • Williams, Ying P FL
    2012-12-22 → cancelled 2013-02-22
  • WARREN, JEFFREY J VA
    2015-03-13 → cancelled 2020-04-10
← Back to W4PIN License history →