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

W0SZ

Active

ZUMBRUN, STEPHEN R

Location: GREELEY, CO
Class: Amateur Extra
Granted: 2016-10-03
Expires: 2026-12-18
Previous call: W6SHO
FRN: 0005928536

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

Vanity availability

Held

Currently held

W0SZ 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

W6SHO
no FCC ULS record on file

License history

0 events

No recorded events.

More vanity slots coming available

From Colorado

All →

KB7PWB 2026-09-10
KF0RME 2026-09-10
KD0TBG 2026-09-11
KD0TBU 2026-09-11
KD0TBW 2026-09-11

Starting with W0

All →

W0GAB MO · 2026-09-16
W0SCL CO · 2026-09-17
W0DMY KS · 2026-09-20
W0CVF CO · 2026-09-23
W0KLD MO · 2026-09-24

Full history → Vanity availability → Callsign genealogy →