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

W5SM callsign genealogy

Currently held by BYERLY, JOHN S

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 W5SM's current licensee, walking backwards.

  1. W5SMHcancelled· E
    Harris, Stephen MTXgranted 2024-10-16cancelled 2025-01-17
  2. KJ5ICUcancelled· T
    Harris, Stephen Mtxgranted 2024-09-25cancelled 2024-10-16

Successor callsigns

Callsigns held now by people who previously held W5SM.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W5SM, oldest first.

  • WORDEN, MARION R TX
    1994-07-14 → cancelled 1995-02-11
  • BYERLY, JOHN S TX
    2012-09-29 → cancelled 2024-12-28
  • Harris, Stephen M TX
    2025-01-17 active
← Back to W5SM License history →