uls-tracker
Sign in
Confidence: Medium · Source: FCC ULS · As of 2026-09-12

WB0MM callsign genealogy

Currently held by BLOCK, MICHAEL M

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 WB0MM's current licensee, walking backwards.

  1. AD0IIcancelled· E
    MYERS, MARK BMOgranted 2014-05-06cancelled 2014-05-16
  2. N9YDZcancelled· E
    MYERS, MARK BMOgranted 2004-05-03cancelled 2014-04-24

Successor callsigns

Callsigns held now by people who previously held WB0MM.

  1. WW0MMactive· A
    BLOCK, MICHAEL MKSgranted 2020-04-17

All historical holders

Every license row we've seen with the callsign WB0MM, oldest first.

  • BLOCK, MICHAEL M KS
    2009-09-29 → cancelled 2010-06-22
  • MYERS, MARK B MO
    2024-04-30 active
← Back to WB0MM License history →