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

AC0HT

Cancelled

Gritzmacher, Donald E

Location: Thornton, CO
Class: Amateur Extra
Granted: 2017-01-28
Expires: 2027-02-16
Previous call: KC0ZNU
FRN: 0016116600

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Vanity availability

456d

Available on 2027-12-09

AC0HT cancelled on 2025-12-09. Hold ends in 456 days.

Last held by Gritzmacher, Donald E (CO).

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

Previously held by current licensee

KC0ZNUcancelled· E
Gritzmacher, Donald ECOgranted 2007-02-16cancelled 2007-04-18

Prior holders later became

K2QFactive· E
Gritzmacher, Donald ECOgranted 2025-12-09

License history

0 events

No recorded events.

More vanity slots coming available

From Colorado

K0RTS 2026-09-09
K7UGT 2026-09-09
W0RMH 2026-09-09
KB7PWB 2026-09-10
KF0RME 2026-09-10

Starting with AC0

AC0GJ CO · 2026-10-26
AC0DE WA · 2027-01-17
AC0JC MN · 2027-03-14
AC0JM CO · 2027-12-12
AC0ZQ NE · 2028-02-18

Full history → Vanity availability → Callsign genealogy →