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

KD3ZX

Active

FARRELL, MARK S

Location: TREICHLERS, PA
Class: Advanced
Granted: 2024-09-19
Expires: 2034-11-16
Previous call: KZ3DX
FRN: 0005091137

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Vanity availability

Held

Currently held

KD3ZX 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

KZ3DXactive· E
Erfurth, W AUTgranted 2018-11-14
W7GSAactive
Galileo STEM Academy Amateur Radio ClubIDgranted 2019-03-01
W7BDRcancelled
Digital Amateur Radio Club Of The Treasure ValleyIDgranted 2015-10-16cancelled 2019-03-01

Prior holders later became

AA3ASexpired· E
MIYAZAKI, YOSHITAKAMDgranted 1992-06-16cancelled 2004-06-17

License history

0 events

No recorded events.

More vanity slots coming available

From Pennsylvania

All →

KB3QHC 2026-09-09
N3NFG 2026-09-09
KB3HBB 2026-09-10
KB3ZFA 2026-09-10
KB3ZFB 2026-09-10

Starting with KD3

All →

KD3FG MD · 2026-09-21
KD3AAJ MD · 2026-11-16
KD3AAM MD · 2026-11-16
KD3AAO PA · 2026-11-22
KD3ABY MD · 2026-11-30

Full history → Vanity availability → Callsign genealogy →