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

AB4T

Active

HALLIHAN, PATRICK T

Location: Matthews, NC
Class: Amateur Extra
Granted: 2021-05-08
Expires: 2031-05-08
Previous call: AK4UT
FRN: 0001807353

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Vanity availability

Held

Currently held

AB4T 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

AK4UTcancelled· E
HALLIHAN, PATRICK TNCgranted 2020-05-12cancelled 2021-05-08
NR1Kactive· E
Hou, SongyaoCAgranted 2022-07-06
KN6TVXcancelled· E
Hou, SongyaoCAgranted 2022-04-19cancelled 2022-07-06

License history

0 events

No recorded events.

More vanity slots coming available

From North Carolina

All →

KA2OFF 2026-09-09
W2RDU 2026-09-09
K4LWW 2026-09-10
K4ONS 2026-09-10
KG4TPH 2026-09-10

Starting with AB4

All →

AB4LC AL · 2026-09-14
AB4BH NC · 2027-01-14
AB4NH TN · 2027-01-17
AB4RM FL · 2027-02-15
AB4N TN · 2027-03-21

Full history → Vanity availability → Callsign genealogy →