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 16d ago
Flights observed
105
Distinct callsigns
20
Country
AU
Last broadcast
16d 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
UTY4823 Alliance Airlines 10 2026-06-29
UTY4821 Alliance Airlines 9 2026-06-18
UTY4824 - 5 2026-06-30
SOL726 - 3 2026-06-19
SOL700 - 3 2026-07-03
QLK1990 - 3 2026-06-18
QLK1846 - 3 2026-06-04
QLK1827 - 3 2026-06-17
QLK1826 - 3 2026-06-17
UTY7240 Alliance Airlines 2 2026-06-21
UTY713 Alliance Airlines 2 2026-05-20
UTY712 Alliance Airlines 2 2026-06-30
SOL701 Solomon Airlines 2 2026-06-07
QLK1988 - 2 2026-06-23
QLK1987 - 2 2026-06-23
QLK1981 - 2 2026-05-24
QLK1882 - 2 2026-06-06
QLK1874 - 2 2026-06-10
QLK1823 - 2 2026-06-24
QLK1822 - 2 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 QLK1944 - Jul 10, 08:40 UTCJul 10, 10:40 UTC2h 0m
2026-07-10 QLK1943 - Jul 10, 05:20 UTCJul 10, 07:20 UTC2h 0m
2026-07-06 UTY9820 - Jul 6, 04:05 UTCJul 6, 05:40 UTC1h 35m
2026-07-03 SOL700 BNE → BNE Jul 3, 00:15 UTCJul 3, 10:10 UTC9h 55m
2026-07-02 UTY9825 - Jul 2, 11:15 UTCJul 2, 12:35 UTC1h 20m
2026-06-30 UTY712 BNE → CNJ Jun 30, 22:15 UTCJun 30, 22:50 UTC35m
2026-06-30 UTY4824 BNE → BNE Jun 30, 10:15 UTCJun 30, 10:25 UTC10m
2026-06-30 UTY4824 BNE → BNE Jun 30, 09:50 UTCJun 30, 10:10 UTC20m
2026-06-30 UTY4824 BNE → BNE Jun 30, 09:25 UTCJun 30, 09:40 UTC15m
2026-06-29 UTY4823 BNE → AYQ Jun 29, 20:30 UTCJun 30, 04:20 UTC7h 51m
2026-06-28 QLK1918 BNE → BNE Jun 28, 00:00 UTCJun 28, 02:34 UTC2h 35m
2026-06-25 UTY4823 BNE → AYQ Jun 25, 20:14 UTCJun 26, 03:54 UTC7h 40m
2026-06-24 UTY4823 BNE → AYQ Jun 24, 20:05 UTCJun 25, 04:04 UTC8h 0m
2026-06-24 QLK1956 - Jun 24, 09:09 UTCJun 24, 10:35 UTC1h 25m
2026-06-24 QLK1955 - Jun 24, 06:50 UTCJun 24, 08:20 UTC1h 30m
2026-06-24 QLK1823 - Jun 24, 00:34 UTCJun 24, 01:44 UTC1h 10m
2026-06-23 QLK1822 - Jun 23, 22:25 UTCJun 23, 23:50 UTC1h 25m
2026-06-23 QLK1988 - Jun 23, 20:10 UTCJun 23, 21:05 UTC55m
2026-06-23 QLK1987 - Jun 23, 09:34 UTCJun 23, 10:35 UTC1h 0m
2026-06-22 UTY4823 BNE → AYQ Jun 22, 20:00 UTCJun 23, 03:39 UTC7h 40m
2026-06-21 UTY7240 TSV → WEI Jun 21, 22:40 UTCJun 22, 04:54 UTC6h 15m
2026-06-21 QLK1847 BNE → BNE Jun 21, 06:50 UTCJun 21, 10:04 UTC3h 15m
2026-06-21 QLK1984 - Jun 21, 04:30 UTCJun 21, 05:40 UTC1h 10m
2026-06-21 QLK1983 - Jun 21, 02:35 UTCJun 21, 03:25 UTC50m
2026-06-19 SOL726 - Jun 19, 23:44 UTCJun 20, 00:14 UTC30m
2026-06-18 UTY4821 BNE → ASP Jun 18, 19:50 UTCJun 19, 03:49 UTC7h 59m
2026-06-18 QLK1990 BNE → BNE Jun 18, 04:55 UTCJun 18, 10:05 UTC5h 10m
2026-06-17 UTY4821 BNE → ASP Jun 17, 19:50 UTCJun 18, 03:10 UTC7h 20m
2026-06-17 QLK1827 - Jun 17, 05:15 UTCJun 17, 06:25 UTC1h 10m
2026-06-17 QLK1826 BNE → MKY Jun 17, 03:00 UTCJun 17, 04:21 UTC1h 20m
2026-06-17 QLK1823 - Jun 17, 00:40 UTCJun 17, 01:50 UTC1h 10m
2026-06-16 QLK1822 - Jun 16, 22:30 UTCJun 16, 23:50 UTC1h 20m
2026-06-16 QLK1950 - Jun 16, 06:40 UTCJun 16, 08:00 UTC1h 20m
2026-06-16 QLK1949 - Jun 16, 04:20 UTCJun 16, 05:45 UTC1h 25m
2026-06-14 UTY7240 TSV → WEI Jun 14, 23:05 UTCJun 15, 05:35 UTC6h 29m
2026-06-14 QLK7880 BNE → BNE Jun 14, 05:45 UTCJun 14, 09:55 UTC4h 10m
2026-06-12 SOL726 SON → VLI Jun 12, 23:15 UTCJun 13, 06:05 UTC6h 49m
2026-06-11 UTY4821 BNE → ASP Jun 11, 20:10 UTCJun 12, 03:40 UTC7h 30m
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

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 16d 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 UTY4823, UTY4821, UTY4824, SOL726, SOL700.