Confidence: Medium · Source: FCC ULS · As of 2026-09-10

W3OBX

Active

Mason, Thomas R

Location: Forestville, MD
Class: Amateur Extra
Granted: 2023-05-13
Expires: 2033-05-13
Previous call: KC3TAS
FRN: 0031459118

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

Vanity availability

Held

Currently held

W3OBX 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

KC3TAScancelled· E
Mason, Thomas RMDgranted 2021-11-08cancelled 2023-05-13

Prior holders later became

NY3Zactive· E
FRIEND, DONALD FMDgranted 2021-04-23

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 W3

All →

W3IFX NY · 2026-09-10
W3AHR PA · 2026-09-20
W3YMB PA · 2026-09-21
W3TAL MD · 2026-09-28
W3EOP PA · 2026-10-07

Full history → Vanity availability → Callsign genealogy →