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

WR4A callsign genealogy

Currently held by HERBSTER, TERRY N

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 WR4A's current licensee, walking backwards.

  1. W9MSScancelled· E
    Schweiner, Maxwell SWIgranted 2013-09-13cancelled 2017-12-22
  2. KC9YLGcancelled· T
    Schweiner, Maxwell SWIgranted 2013-03-01cancelled 2013-09-13

Successor callsigns

Callsigns held now by people who previously held WR4A.

  1. W3CHRcancelled· E
    HERBSTER, TERRY NALgranted 2009-04-07cancelled 2012-01-27

All historical holders

Every license row we've seen with the callsign WR4A, oldest first.

  • HERBSTER, TERRY N AL
    2006-02-07 → cancelled 2009-04-07
  • Shamrock Sr, Mark A FL
    2021-02-09 active
← Back to WR4A License history →