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

WB1CDB

Active

DZIUBA, MICHAEL J

Location: Dandridge, TN
Class: General
Granted: 2025-06-27
Expires: 2035-06-27
Previous call: K4MJD
FRN: 0015595655

Get notified about status changes and vanity availability for this callsign.

Vanity availability

Held

Currently held

WB1CDB is held by an active license; it isn't a vanity slot right now.

Vanity availability dates are computed from FCC §97.19's hold periods: 2 years from the cancellation date for cancelled or terminated licenses, 4 years from the expiration date for expired licenses (2-year renewal grace + 2-year hold).

Callsign genealogy

Full chain →

Previously held by current licensee

K4MJDcancelled· G
DZIUBA, MICHAEL JTNgranted 2021-09-11cancelled 2025-06-27
KE4MJDcancelled· G
DZIUBA, MICHAEL JTNgranted 2020-09-18cancelled 2021-09-11
KB4WTFactive· G
Cararo, SalvatoreFLgranted 2022-11-04

License history

0 events

No recorded events.

More vanity slots coming available

From Tennessee

All →

KG4TWC 2026-09-10
KK4LNE 2026-09-10
KK4LNK 2026-09-10
KQ4TPH 2026-09-10
KQ4UUA 2026-09-10

Starting with WB1

All →

WB1DOF NH · 2026-09-18
WB1CBH CA · 2026-09-28
WB1ANB ME · 2026-11-02
WB1ERI FL · 2026-12-07
WB1FFO NE · 2026-12-28

Full history → Vanity availability → Callsign genealogy →