uls-tracker Sign in

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

KR4ODU

Cancelled

Olgren, Matthew R

Location: Lake Wales, FL
Class: Technician
Granted: 2026-08-05
Expires: 2036-08-05
FRN: 0038730925

Sign in to watch

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

Vanity availability

714d

Available on 2028-08-24

KR4ODU cancelled on 2026-08-25. Hold ends in 714 days.

Last held by Olgren, Matthew R (FL).

Confidence: High

Cancelled licenses begin the 2-year hold immediately on the cancellation date, so this is the firm release date per §97.19.

Callsign genealogy

Prior holders later became

K4OLGactive· T
Olgren, Matthew RFLgranted 2026-08-25

License history

0 events

No recorded events.

More vanity slots coming available

From Florida

K4CYG 2026-09-10
K4YDD 2026-09-10
KG4QXI 2026-09-10
KG4RVV 2026-09-10
KG4VAB 2026-09-10

Starting with KR4

KR4AAB AL · 2027-01-11
KR4ABQ FL · 2027-01-17
KR4BBR FL · 2027-01-17
KR4ACS VA · 2027-01-18
KR4ADZ FL · 2027-01-22

Full history → Vanity availability → Callsign genealogy →