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

K4OOO

Active

STERLING, WILLIAM G

Location: BROOKFIELD, CT
Class: Amateur Extra
Granted: 2023-02-01
Expires: 2033-03-29
Previous call: K4WGS
FRN: 0005189527

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Vanity availability

Held

Currently held

K4OOO 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

K4WGSactive· E
Schetrompf, Walter GNCgranted 2025-04-19
KM4JKZcancelled· G
Schetrompf, Walter GNCgranted 2015-03-31cancelled 2015-05-08

License history

0 events

No recorded events.

More vanity slots coming available

From Connecticut

All →

KC1VGT 2026-09-10
KD0TBC 2026-09-10
N1DWY 2026-09-12
W1BEK 2026-09-13
KB1ITJ 2026-09-15

Starting with K4

All →

K4HCL FL · 2026-09-09
K4CYG FL · 2026-09-10
K4LWW NC · 2026-09-10
K4ONS NC · 2026-09-10
K4YDD FL · 2026-09-10

Full history → Vanity availability → Callsign genealogy →