Confidence: Medium · Source: FCC ULS · As of 2026-09-14

KR4OX

Expired

UNDERWOOD, CHARLES R

Location: MARIETTA, GA
Class: Amateur Extra
Granted: 2014-01-02
Expires: 2024-03-22
Previous call: KD4HMG
FRN: 0009577461

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Vanity availability

554d

Available on 2028-03-21

KR4OX expired on 2024-03-22. Hold ends in 554 days.

Last held by UNDERWOOD, CHARLES R (GA).

Confidence: High

Expired licenses get a 2-year FCC renewal grace period followed by the 2-year hold. The date shown accounts for both, so it's the firm release date per §97.19.

Callsign genealogy

Full chain →

Previously held by current licensee

KD4HMG
no FCC ULS record on file

License history

0 events

No recorded events.

More vanity slots coming available

From Georgia

All →

KD4SVG 2026-09-14
KD4SXJ 2026-09-14
KQ4ULV 2026-09-14
N4MOC 2026-09-14
KG4VCH 2026-09-15

Starting with KR4

All →

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 →