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

AB0Z

Active

FENZLAFF, RALPH B

Location: AURORA, CO
Class: Amateur Extra
Granted: 2019-08-30
Expires: 2029-08-30
Previous call: W0RBF
FRN: 0022273965

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Vanity availability

Held

Currently held

AB0Z 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

W0RBFcancelled· E
FENZLAFF, RALPH BCOgranted 2016-11-11cancelled 2019-08-30
KD0UCBcancelled· G
FENZLAFF, RALPH BCOgranted 2013-01-14cancelled 2016-11-11

License history

0 events

No recorded events.

More vanity slots coming available

From Colorado

All →

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

Starting with AB0

All →

AB0UX MN · 2026-09-10
AB0YX MO · 2026-09-26
AB0DI IA · 2026-11-02
AB0DP KS · 2026-12-21
AB0UV MN · 2027-01-18

Full history → Vanity availability → Callsign genealogy →