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

AI4ML

Active

Liu, Shen

Location: Portland, OR
Class: Amateur Extra
Granted: 2021-04-03
Expires: 2031-04-03
Previous call: AI7GB
FRN: 0030230908

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

Vanity availability

Held

Currently held

AI4ML 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

AI7GBcancelled· E
Liu, ShenORgranted 2020-12-01cancelled 2021-04-03
KN6MKDcancelled· E
Liu, ShenORgranted 2020-12-01cancelled 2021-03-16

Prior holders later became

KG4Sexpired· E
HART, MICHAEL DSCgranted 2006-02-14cancelled 2018-02-15

License history

0 events

No recorded events.

More vanity slots coming available

From Oregon

All →

KG4JXE 2026-09-10
KK7NUS 2026-09-10
KK7UWX 2026-09-10
KK7UYS 2026-09-10
KD7SJF 2026-09-11

Starting with AI4

All →

AI4LB FL · 2026-09-18
AI4BO FL · 2026-11-20
AI4QU TN · 2026-11-29
AI4FC MA · 2026-12-16
AI4ES KY · 2026-12-31

Full history → Vanity availability → Callsign genealogy →