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

W4DYR

Active

O'Brien, Michael D

Location: W Melbourne, FL
Class: Amateur Extra
Granted: 2017-05-25
Expires: 2027-07-28
Previous call: N4GRM
FRN: 0014314520

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

Vanity availability

Held

Currently held

W4DYR 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

N4GRMactive· T
McCord Jr, George RFLgranted 2024-02-13
KO4UHUcancelled· T
McCord Jr, George RFLgranted 2021-10-26cancelled 2024-02-13

License history

0 events

No recorded events.

More vanity slots coming available

From Florida

All →

K4HCL 2026-09-09
KG4UZU 2026-09-09
KG4UZX 2026-09-09
KK4LMR 2026-09-09
W3EFZ 2026-09-09

Starting with W4

All →

W4HKO FL · 2026-09-09
W4IDI AL · 2026-09-10
W4YAU TN · 2026-09-10
W4CVH VA · 2026-09-12
W4QDZ NC · 2026-09-13

Full history → Vanity availability → Callsign genealogy →