Apparatus

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sensors Mode-S transponder

7C0403

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-A2T · EMBRAER ERJ-190-100

Hex
7C0403
Octal
37002003
Decimal
8,127,491
Country
AU
Tail
VH-A2T
Type
E190
No current signal · last broadcast 4h ago
Flights observed
68
Distinct callsigns
20
Country
AU
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 7C0403.

Country allocation

The ICAO 24-bit address 7C0403 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
UTY4821 Alliance Airlines 7 2026-06-11
UTY4823 Alliance Airlines 6 2026-06-04
QLK1846 - 3 2026-06-04
UTY713 Alliance Airlines 2 2026-05-20
UTY4824 Alliance Airlines 2 2026-05-25
SOL701 Solomon Airlines 2 2026-06-07
SOL700 Solomon Airlines 2 2026-06-08
QLK1990 - 2 2026-06-07
QLK1981 - 2 2026-05-24
QLK1882 - 2 2026-06-06
QLK1874 - 2 2026-06-10
QLK1827 - 2 2026-06-01
QLK1826 - 2 2026-06-01
QLK1808 - 2 2026-05-30
UTY9682 Alliance Airlines 1 2026-04-26
UTY9681 Alliance Airlines 1 2026-04-23
UTY881 Alliance Airlines 1 2026-06-11
UTY712 Alliance Airlines 1 2026-05-05
UTY551 Alliance Airlines 1 2026-05-26
UTY4822 Alliance Airlines 1 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-11 UTY4821 BNE → ASP Jun 11, 20:10 UTCJun 11, 20:40 UTC30m
2026-06-11 UTY881 TSV → BNE Jun 11, 04:40 UTCJun 11, 09:40 UTC5h 0m
2026-06-10 UTY4821 BNE → ASP Jun 10, 19:50 UTCJun 11, 03:25 UTC7h 35m
2026-06-10 QLK1874 BNE → BNE Jun 10, 01:45 UTCJun 10, 08:25 UTC6h 40m
2026-06-09 QLK1821 - Jun 9, 22:15 UTCJun 9, 23:25 UTC1h 10m
2026-06-09 QLK1820 - Jun 9, 20:20 UTCJun 9, 21:15 UTC55m
2026-06-08 UTY4821 BNE → ASP Jun 8, 19:40 UTCJun 9, 03:20 UTC7h 40m
2026-06-08 SOL700 HIR → BNE Jun 8, 06:15 UTCJun 8, 07:15 UTC1h 0m
2026-06-08 SOL700 HIR → BNE Jun 8, 06:00 UTCJun 8, 06:10 UTC10m
2026-06-07 SOL701 BNE → HIR Jun 7, 23:35 UTCJun 8, 01:05 UTC1h 30m
2026-06-07 SOL701 BNE → HIR Jun 7, 23:25 UTCJun 7, 23:30 UTC5m
2026-06-07 QLK1989 - Jun 7, 08:20 UTCJun 7, 09:35 UTC1h 15m
2026-06-07 QLK1990 - Jun 7, 05:35 UTCJun 7, 06:15 UTC40m
2026-06-07 QLK1990 - Jun 7, 04:40 UTCJun 7, 05:15 UTC35m
2026-06-07 QLK1883 - Jun 7, 02:45 UTCJun 7, 03:20 UTC35m
2026-06-06 QLK1882 - Jun 6, 22:20 UTCJun 7, 02:25 UTC4h 5m
2026-06-06 QLK1882 BNE → BNE Jun 6, 22:05 UTCJun 6, 22:10 UTC5m
2026-06-05 SOL726 SON → VLI Jun 5, 23:15 UTCJun 6, 06:30 UTC7h 15m
2026-06-04 UTY4823 BNE → AYQ Jun 4, 20:10 UTCJun 5, 03:55 UTC7h 45m
2026-06-04 QLK1846 - Jun 4, 05:15 UTCJun 4, 08:00 UTC2h 45m
2026-06-03 UTY4821 BNE → ASP Jun 3, 20:00 UTCJun 4, 03:35 UTC7h 35m
2026-06-03 QLK1874 BNE → BNE Jun 3, 01:45 UTCJun 3, 08:15 UTC6h 30m
2026-06-01 UTY4821 BNE → ASP Jun 1, 19:45 UTCJun 2, 03:30 UTC7h 45m
2026-06-01 QLK1827 - Jun 1, 05:20 UTCJun 1, 06:35 UTC1h 15m
2026-06-01 QLK1826 BNE → MKY Jun 1, 03:20 UTCJun 1, 04:30 UTC1h 10m
2026-05-31 QLK1988 - May 31, 20:05 UTCMay 31, 21:00 UTC55m
2026-05-31 QLK1987 - May 31, 09:50 UTCMay 31, 10:50 UTC1h 0m
2026-05-30 QLK1808 - May 30, 08:25 UTCMay 30, 10:25 UTC2h 0m
2026-05-29 QLK1795 - May 29, 23:00 UTCMay 30, 00:35 UTC1h 35m
2026-05-29 QLK1794 - May 29, 20:50 UTCMay 29, 22:05 UTC1h 15m
2026-05-29 QLK1809 - May 29, 09:25 UTCMay 29, 11:50 UTC2h 25m
2026-05-29 QLK1846 - May 29, 05:30 UTCMay 29, 08:00 UTC2h 30m
2026-05-28 UTY4821 BNE → ASP May 28, 19:40 UTCMay 29, 03:15 UTC7h 35m
2026-05-27 UTY4821 BNE → ASP May 27, 19:45 UTCMay 28, 03:15 UTC7h 30m
2026-05-26 UTY551 MOV → BNE May 26, 21:55 UTCMay 27, 10:55 UTC13h 0m
2026-05-25 UTY4824 ASP → BNE May 25, 20:15 UTCMay 26, 04:20 UTC8h 5m
2026-05-25 QLK1932 BNE → BNE May 25, 08:00 UTCMay 25, 11:00 UTC3h 0m
2026-05-25 QLK1827 - May 25, 05:15 UTCMay 25, 06:20 UTC1h 5m
2026-05-25 QLK1826 - May 25, 02:55 UTCMay 25, 04:20 UTC1h 25m
2026-05-24 QLK1981 - May 24, 23:00 UTCMay 24, 23:30 UTC30m
2026-05-24 QLK1833 - May 24, 20:05 UTCMay 24, 21:15 UTC1h 10m
2026-05-24 QLK1830 - May 24, 09:20 UTCMay 24, 10:45 UTC1h 25m
2026-05-24 QLK1875 BNE → BNE May 24, 01:30 UTCMay 24, 07:50 UTC6h 20m
2026-05-21 UTY4822 ASP → BNE May 21, 19:45 UTCMay 22, 03:20 UTC7h 35m
2026-05-21 QLK1930 BNE → BNE May 21, 05:10 UTCMay 21, 08:10 UTC3h 0m
2026-05-20 UTY4823 BNE → AYQ May 20, 20:10 UTCMay 21, 03:45 UTC7h 35m
2026-05-20 QLK1995 - May 20, 09:15 UTCMay 20, 09:50 UTC35m
2026-05-20 QLK1894 - May 20, 07:30 UTCMay 20, 08:00 UTC30m
2026-05-20 UTY713 CNJ → BNE May 20, 05:50 UTCMay 20, 06:15 UTC25m
2026-05-08 QLK6296 - May 8, 07:29 UTCMay 8, 08:05 UTC35m

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-A2T page for operator, model, and routing details .

Mode-S 7C0403 frequently asked

What is Mode-S code 7C0403?
7C0403 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-A2T.
Where is Mode-S 7C0403 registered?
Mode-S code 7C0403 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C0403 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C0403, octal 37002003, decimal 8,127,491.
What flights does 7C0403 operate?
Mode-S 7C0403 has broadcast 20 distinct callsigns, including UTY4821, UTY4823, QLK1846, UTY713, UTY4824.