Apparatus

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sensors Mode-S transponder

7C03F9

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-A2J · EMBRAER ERJ-190-100

Hex
7C03F9
Octal
37001771
Decimal
8,127,481
Country
AU
Tail
VH-A2J
Type
E190
No current signal · last broadcast 6h ago
Flights observed
180
Distinct callsigns
20
Country
AU
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 7C03F9.

Country allocation

The ICAO 24-bit address 7C03F9 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
UTY3104 - 18 2026-07-15
UTY8628 - 12 2026-07-09
UTY3136 Alliance Airlines 11 2026-07-17
UTY8620 - 8 2026-07-07
UTY3137 - 8 2026-07-15
UTY3148 - 7 2026-06-29
UTY3204 - 5 2026-07-17
UTY3150 - 5 2026-07-13
UTY3110 Alliance Airlines 5 2026-06-04
UTY3100 - 5 2026-07-12
QLK1996 - 5 2026-05-31
UTY8629 - 4 2026-07-16
UTY8623 - 4 2026-07-16
UTY3160 Alliance Airlines 4 2026-06-17
UTY3152 - 4 2026-07-15
UTY3151 Alliance Airlines 4 2026-07-14
UTY3102 Alliance Airlines 4 2026-06-15
QLK1999 - 4 2026-05-31
QLK1997 - 4 2026-05-31
UTY8624 - 3 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 UTY3204 ADL → ADL Jul 17, 21:44 UTCJul 18, 00:29 UTC2h 45m
2026-07-17 UTY3136 ADL → OLP Jul 17, 05:35 UTCJul 17, 08:30 UTC2h 55m
2026-07-16 UTY8623 ADL → ADL Jul 16, 22:45 UTCJul 17, 01:55 UTC3h 10m
2026-07-16 UTY8629 ADL → ADL Jul 16, 02:00 UTCJul 16, 05:15 UTC3h 15m
2026-07-15 UTY3104 ADL → ADL Jul 15, 21:40 UTCJul 16, 00:20 UTC2h 40m
2026-07-15 UTY3152 ADL → ADL Jul 15, 09:55 UTCJul 15, 12:25 UTC2h 30m
2026-07-15 UTY3137 ADL → ADL Jul 15, 05:35 UTCJul 15, 08:30 UTC2h 55m
2026-07-14 UTY8623 ADL → ADL Jul 14, 23:25 UTCJul 15, 02:40 UTC3h 15m
2026-07-14 UTY3151 OLP → ADL Jul 14, 09:25 UTCJul 14, 12:15 UTC2h 50m
2026-07-14 UTY3137 ADL → ADL Jul 14, 05:35 UTCJul 14, 08:20 UTC2h 45m
2026-07-14 UTY3119 ADL → ADL Jul 14, 01:20 UTCJul 14, 04:00 UTC2h 40m
2026-07-13 UTY3150 ADL → ADL Jul 13, 09:20 UTCJul 13, 12:05 UTC2h 45m
2026-07-13 UTY3137 ADL → ADL Jul 13, 05:45 UTCJul 13, 08:20 UTC2h 35m
2026-07-13 UTY8624 ADL → ADL Jul 13, 00:35 UTCJul 13, 03:50 UTC3h 15m
2026-07-12 UTY3100 ADL → ADL Jul 12, 20:45 UTCJul 12, 23:30 UTC2h 45m
2026-07-09 UTY8628 ADL → ADL Jul 9, 01:40 UTCJul 9, 04:55 UTC3h 15m
2026-07-07 UTY8620 ADL → ADL Jul 7, 23:05 UTCJul 8, 02:15 UTC3h 10m
2026-07-07 UTY8628 ADL → ADL Jul 7, 01:45 UTCJul 7, 05:00 UTC3h 15m
2026-07-06 UTY8624 ADL → ADL Jul 6, 00:45 UTCJul 6, 03:50 UTC3h 5m
2026-07-05 QLK1907 - Jul 5, 00:45 UTCJul 5, 01:15 UTC30m
2026-07-02 QLK1912 - Jul 2, 08:05 UTCJul 2, 08:40 UTC35m
2026-07-02 UTY8628 ADL → ADL Jul 2, 01:50 UTCJul 2, 05:30 UTC3h 40m
2026-07-01 UTY3104 ADL → ADL Jul 1, 21:45 UTCJul 2, 00:30 UTC2h 45m
2026-07-01 UTY3152 ADL → ADL Jul 1, 09:35 UTCJul 1, 12:20 UTC2h 45m
2026-07-01 UTY3136 ADL → ADL Jul 1, 05:40 UTCJul 1, 08:15 UTC2h 35m
2026-07-01 UTY8620 ADL → ADL Jul 1, 00:10 UTCJul 1, 03:45 UTC3h 35m
2026-06-30 UTY3120 ADL → ADL Jun 30, 02:55 UTCJun 30, 09:00 UTC6h 5m
2026-06-29 UTY3104 ADL → ADL Jun 29, 23:14 UTCJun 30, 01:55 UTC2h 41m
2026-06-29 UTY3148 ADL → ADL Jun 29, 08:39 UTCJun 29, 11:14 UTC2h 35m
2026-06-28 UTY3104 ADL → ADL Jun 28, 22:29 UTCJun 29, 01:25 UTC2h 55m
2026-06-25 UTY8620 ADL → ADL Jun 25, 22:39 UTCJun 26, 01:50 UTC3h 10m
2026-06-25 UTY3138 ADL → ADL Jun 25, 06:05 UTCJun 25, 09:20 UTC3h 15m
2026-06-25 UTY8628 ADL → ADL Jun 25, 01:44 UTCJun 25, 04:45 UTC3h 0m
2026-06-24 UTY3105 OLP → ADL Jun 24, 21:44 UTCJun 25, 00:19 UTC2h 35m
2026-06-23 UTY8620 ADL → ADL Jun 23, 23:14 UTCJun 24, 02:24 UTC3h 10m
2026-06-23 UTY8628 ADL → ADL Jun 23, 01:59 UTCJun 23, 06:39 UTC4h 40m
2026-06-22 QLK1801 BNE → ADL Jun 22, 20:34 UTCJun 22, 23:10 UTC2h 35m
2026-06-22 QLK1810 ADL → BNE Jun 22, 10:49 UTCJun 22, 12:44 UTC1h 55m
2026-06-22 QLK1905 - Jun 22, 09:19 UTCJun 22, 09:54 UTC35m
2026-06-22 QLK1905 - Jun 22, 06:35 UTCJun 22, 06:45 UTC10m
2026-06-22 QLK1906 - Jun 22, 01:35 UTCJun 22, 02:10 UTC35m
2026-06-19 QLK1907 - Jun 19, 23:54 UTCJun 20, 00:24 UTC30m
2026-06-18 QLK1904 - Jun 18, 22:40 UTCJun 18, 23:10 UTC30m
2026-06-18 QLK1799 - Jun 18, 09:30 UTCJun 18, 11:10 UTC1h 40m
2026-06-18 QLK1798 - Jun 18, 07:10 UTCJun 18, 08:20 UTC1h 10m
2026-06-18 UTY8628 ADL → ADL Jun 18, 01:45 UTCJun 18, 05:05 UTC3h 20m
2026-06-17 UTY3148 ADL → OLP Jun 17, 08:45 UTCJun 17, 11:35 UTC2h 50m
2026-06-17 UTY3160 ADL → OLP Jun 17, 05:00 UTCJun 17, 07:55 UTC2h 55m
2026-06-16 UTY3100 ADL → OLP Jun 16, 20:45 UTCJun 17, 00:10 UTC3h 25m
2026-06-16 UTY3151 OLP → ADL Jun 16, 11:40 UTCJun 16, 12:05 UTC25m

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-A2J page for operator, model, and routing details .

Mode-S 7C03F9 frequently asked

What is Mode-S code 7C03F9?
7C03F9 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-A2J.
Where is Mode-S 7C03F9 registered?
Mode-S code 7C03F9 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C03F9 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C03F9, octal 37001771, decimal 8,127,481.
What flights does 7C03F9 operate?
Mode-S 7C03F9 has broadcast 20 distinct callsigns, including UTY3104, UTY8628, UTY3136, UTY8620, UTY3137.