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

KB4TUZ

Active

Concejo Martinez, Guzman Concejo

Location: Rockville, MD
Class: Technician
Granted: 2025-06-03
Expires: 2035-06-03
Previous call: KD3BHB
FRN: 0036990406

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Vanity availability

Held

Currently held

KB4TUZ 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

KD3BHBcancelled· T
Concejo Martinez, GuzmanMDgranted 2025-05-15cancelled 2025-06-03

Prior holders later became

N4PDGexpired· G
MURPHY, WILLIAM JNCgranted 1988-02-23cancelled 2000-02-24

License history

0 events

No recorded events.

More vanity slots coming available

From Maryland

All →

N3JTJ 2026-09-12
KB3ZFH 2026-09-13
KC3MJH 2026-09-13
KC3ZPN 2026-09-13
KB3HRU 2026-09-18

Starting with KB4

All →

KB4IIB TN · 2026-09-14
KB4CON KY · 2026-09-21
KB4OXL IL · 2026-10-02
KB4CO TN · 2026-10-04
KB4XQ AL · 2026-10-05

Full history → Vanity availability → Callsign genealogy →