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

AG4M callsign genealogy

Currently held by York, William C

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 AG4M's current licensee, walking backwards.

  1. N1TRactive· E
    Zborowski, Gregory JMAgranted 2024-07-26
  2. KB1UGPcancelled· E
    Zborowski, Gregory JMAgranted 2022-02-11cancelled 2024-07-26

Successor callsigns

Callsigns held now by people who previously held AG4M.

  1. N1TRcancelled· E
    York, William CTNgranted 2021-03-09cancelled 2022-07-06

All historical holders

Every license row we've seen with the callsign AG4M, oldest first.

  • ANDERSON, JOHN L TN
    2007-08-21 → cancelled 2017-04-28
  • York, William C TN
    2019-05-17 → cancelled 2021-03-09
  • York, William C TN
    2022-07-06 active
← Back to AG4M License history →