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Confidence: Medium · Source: FCC ULS · As of 2026-09-14

W7MTB callsign genealogy

Currently held by Johannsen, Christopher B

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 W7MTB's current licensee, walking backwards.

  1. KC7UJOcancelled· G
    Johannsen, Christopher BORgranted 2021-12-10cancelled 2022-12-28
  2. KK7BVPcancelled· G
    Johannsen, Christopher BORgranted 2021-11-09cancelled 2021-12-10

Successor callsigns

Callsigns held now by people who previously held W7MTB.

No current licensee on record previously held this callsign.

All historical holders

Every license row we've seen with the callsign W7MTB, oldest first.

  • BARKER, THOMAS W WA
    2010-10-14 → cancelled 2022-10-15
  • Johannsen, Christopher B OR
    2022-12-28 active
← Back to W7MTB License history →