Apparatus

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sensors Mode-S transponder

7C6781

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-UQB · FOKKER 100 · operated by ALLIANCE AIRLINES PTY LIMITED

Hex
7C6781
Octal
37063601
Decimal
8,152,961
Country
AU
Tail
VH-UQB
Type
F100
No current signal · last broadcast 2d ago
Flights observed
66
Distinct callsigns
20
Country
AU
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 7C6781.

Country allocation

The ICAO 24-bit address 7C6781 falls within the block assigned to Australia (AU) by ICAO Annex 10, Volume III. Every aircraft registered in Australia receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 20 distinct

Callsign Airline Flights Last seen
UTY4831 Alliance Airlines 9 2026-05-25
UTY751 Alliance Airlines 5 2026-05-27
VOZ9204 Virgin Australia 4 2026-05-25
UTY750 Alliance Airlines 4 2026-05-26
UTY753 Alliance Airlines 3 2026-05-27
UTY752 Alliance Airlines 3 2026-05-27
UTY737 Alliance Airlines 3 2026-05-05
UTY6526 - 3 2026-05-14
VOZ9203 Virgin Australia 2 2026-05-04
UTY731 - 2 2026-05-19
UTY6301 Alliance Airlines 2 2026-05-21
UTY6300 Alliance Airlines 2 2026-05-21
UTY6081 - 2 2026-05-13
UTY4832 Alliance Airlines 2 2026-05-14
VOZ9392 - 1 2026-05-06
UTY953 Alliance Airlines 1 2026-05-19
UTY870 - 1 2026-04-28
UTY805 Alliance Airlines 1 2026-05-26
UTY734 - 1 2026-05-04
UTY733 - 1 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-27 UTY5204 PER → PER May 27, 22:45 UTCMay 28, 01:35 UTC2h 50m
2026-05-27 UTY753 KGI → PER May 27, 07:50 UTCMay 27, 09:00 UTC1h 10m
2026-05-27 UTY752 ISA → TSV May 27, 05:59 UTCMay 27, 06:44 UTC45m
2026-05-27 UTY751 TSV → ISA May 27, 02:54 UTCMay 27, 04:14 UTC1h 20m
2026-05-26 UTY750 PER → KGI May 26, 23:19 UTCMay 27, 00:14 UTC55m
2026-05-26 UTY805 LEI → PER May 26, 08:30 UTCMay 26, 11:24 UTC2h 55m
2026-05-25 UTY4831 PER → AYQ May 25, 21:49 UTCMay 25, 22:44 UTC55m
2026-05-25 VOZ9204 KNX → PER May 25, 07:40 UTCMay 25, 08:15 UTC35m
2026-05-22 UTY6507 PER → PER May 22, 07:25 UTCMay 22, 10:25 UTC3h 0m
2026-05-21 UTY4831 PER → AYQ May 21, 22:20 UTCMay 22, 04:35 UTC6h 15m
2026-05-21 UTY6301 KGI → PER May 21, 09:40 UTCMay 21, 10:45 UTC1h 5m
2026-05-21 UTY6300 PER → KGI May 21, 07:40 UTCMay 21, 08:35 UTC55m
2026-05-20 UTY4831 PER → AYQ May 20, 21:55 UTCMay 21, 04:50 UTC6h 55m
2026-05-20 UTY6303 KGI → PER May 20, 11:20 UTCMay 20, 12:15 UTC55m
2026-05-20 UTY6302 PER → KGI May 20, 09:15 UTCMay 20, 10:10 UTC55m
2026-05-19 UTY731 PER → PER May 19, 21:45 UTCMay 20, 02:30 UTC4h 45m
2026-05-19 UTY953 LNO → PER May 19, 07:40 UTCMay 19, 10:35 UTC2h 55m
2026-05-18 UTY4831 PER → AYQ May 18, 21:45 UTCMay 19, 05:30 UTC7h 45m
2026-05-14 UTY4831 PER → AYQ May 14, 21:40 UTCMay 15, 04:20 UTC6h 40m
2026-05-14 UTY6526 PER → PER May 14, 06:55 UTCMay 14, 10:00 UTC3h 5m
2026-05-14 UTY4832 AYQ → PER May 14, 04:50 UTCMay 14, 05:25 UTC35m
2026-05-13 UTY4831 PER → AYQ May 13, 22:00 UTCMay 13, 22:45 UTC45m
2026-05-13 UTY6081 BQB → PER May 13, 08:15 UTCMay 13, 08:50 UTC35m
2026-05-13 UTY6081 - May 13, 01:15 UTCMay 13, 07:50 UTC6h 35m
2026-05-13 UTY6080 PER → BQB May 13, 00:10 UTCMay 13, 00:35 UTC25m
2026-05-12 UTY4832 AYQ → PER May 12, 04:15 UTCMay 12, 05:00 UTC45m
2026-05-11 UTY4831 PER → AYQ May 11, 22:05 UTCMay 11, 22:35 UTC29m
2026-05-11 VOZ9204 KNX → PER May 11, 01:10 UTCMay 11, 08:15 UTC7h 5m
2026-05-07 UTY753 KGI → PER May 7, 08:45 UTCMay 7, 09:55 UTC1h 10m
2026-05-07 UTY752 ISA → TSV May 7, 06:40 UTCMay 7, 07:30 UTC50m
2026-05-06 UTY731 PER → PER May 6, 21:40 UTCMay 7, 02:55 UTC5h 15m
2026-05-06 VOZ9392 PER → PER May 6, 07:20 UTCMay 6, 11:40 UTC4h 20m
2026-05-06 UTY751 TSV → ISA May 6, 03:05 UTCMay 6, 04:15 UTC1h 10m
2026-05-05 UTY750 PER → KGI May 5, 23:20 UTCMay 6, 00:10 UTC50m
2026-05-05 UTY737 PER → KTA May 5, 07:00 UTCMay 5, 11:15 UTC4h 15m
2026-05-04 UTY734 PER → PER May 4, 23:00 UTCMay 5, 04:00 UTC5h 0m
2026-05-04 VOZ9203 PER → KNX May 4, 01:15 UTCMay 4, 08:15 UTC7h 0m
2026-04-30 UTY4831 PER → AYQ Apr 30, 21:45 UTCMay 1, 04:40 UTC6h 55m
2026-04-30 UTY4100 PER → PER Apr 30, 01:10 UTCApr 30, 04:00 UTC2h 50m
2026-04-28 UTY870 PER → PER Apr 28, 01:00 UTCApr 28, 06:20 UTC5h 20m
2026-04-23 UTY6301 KGI → PER Apr 23, 09:30 UTCApr 23, 10:45 UTC1h 15m
2026-04-23 UTY6300 PER → KGI Apr 23, 07:35 UTCApr 23, 08:30 UTC55m
2026-04-22 UTY6500 PER → PER Apr 22, 23:20 UTCApr 23, 02:30 UTC3h 10m
2026-04-22 UTY737 PER → KTA Apr 22, 06:40 UTCApr 22, 11:15 UTC4h 35m
2026-04-21 UTY737 PER → KTA Apr 21, 08:15 UTCApr 21, 12:30 UTC4h 15m
2026-04-20 UTY4831 PER → AYQ Apr 20, 21:45 UTCApr 21, 04:40 UTC6h 55m
2026-04-20 VOZ9204 KNX → PER Apr 20, 01:10 UTCApr 20, 08:15 UTC7h 5m
2026-04-17 UTY5209 - Apr 17, 09:30 UTCApr 17, 10:00 UTC30m
2026-04-17 UTY5208 - Apr 17, 07:20 UTCApr 17, 07:50 UTC30m
2026-04-17 UTY5203 - Apr 17, 00:44 UTCApr 17, 01:15 UTC30m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the VH-UQB page for operator, model, and routing details .

Mode-S 7C6781 frequently asked

What is Mode-S code 7C6781?
7C6781 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-UQB.
Where is Mode-S 7C6781 registered?
Mode-S code 7C6781 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C6781 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C6781, octal 37063601, decimal 8,152,961.
What flights does 7C6781 operate?
Mode-S 7C6781 has broadcast 20 distinct callsigns, including UTY4831, UTY751, VOZ9204, UTY750, UTY753.