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

AD4JU

Active

CALMBACHER, CHARLES W

Location: LAWRENCEVILLE, GA
Class: Amateur Extra
Granted: 2023-10-03
Expires: 2033-10-03
Previous call: KQ4XD
FRN: 0003543444

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

Vanity availability

Held

Currently held

AD4JU 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

KQ4XD
no FCC ULS record on file

License history

0 events

No recorded events.

More vanity slots coming available

From Georgia

All →

KG6NEC 2026-09-09
KG4VAA 2026-09-10
KK4LOC 2026-09-11
KK4LOG 2026-09-11
KK4LOH 2026-09-11

Starting with AD4

All →

AD4ED GA · 2026-12-03
AD4XA SC · 2027-02-01
AD4WN NC · 2027-03-01
AD4EE FL · 2027-03-11
AD4BT NC · 2027-03-15

Full history → Vanity availability → Callsign genealogy →