Apparatus

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sensors Mode-S transponder

7C4A4A

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-OYK · AIRBUS A-321neo · operated by JETSTAR AIRWAYS PTY LIMITED

Hex
7C4A4A
Octal
37045112
Decimal
8,145,482
Country
AU
Tail
VH-OYK
Type
A21N
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
272
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S 7C4A4A.

Country allocation

The ICAO 24-bit address 7C4A4A 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
JST499 - 12 2026-06-24
JST498 - 12 2026-06-23
JST044 Jetstar Airways 10 2026-07-18
JST688 - 8 2026-06-24
JST089 Jetstar Airways 8 2026-05-14
JST108 - 7 2026-06-20
JST031 Jetstar Airways 7 2026-07-19
JST125 - 6 2026-06-25
JST801 Jetstar Airways 5 2026-07-26
JST800 Jetstar Airways 5 2026-07-25
JST689 - 5 2026-06-24
JST657 Jetstar Airways 5 2026-07-26
JST656 Jetstar Airways 5 2026-07-26
JST128 - 5 2026-06-21
JST126 - 5 2026-06-24
JST974 - 4 2026-06-19
JST973 - 4 2026-06-28
JST111 Jetstar Airways 4 2026-05-28
JST106 Jetstar Airways 4 2026-05-27
JST057 Jetstar Airways 4 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JST928 BNE → CNS Jul 26, 20:30 UTCJul 26, 22:00 UTC1h 30m
2026-07-26 JST906 BNE → TSV Jul 26, 09:35 UTCJul 26, 13:40 UTC4h 5m
2026-07-26 JST657 CBR → BNE Jul 26, 06:25 UTCJul 26, 07:45 UTC1h 21m
2026-07-26 JST656 BNE → CBR Jul 26, 03:55 UTCJul 26, 05:20 UTC1h 25m
2026-07-26 JST801 ADL → BNE Jul 26, 00:40 UTCJul 26, 02:45 UTC2h 5m
2026-07-25 JST800 BNE → ADL Jul 25, 21:25 UTCJul 25, 23:45 UTC2h 20m
2026-07-25 JST965 PER → BNE Jul 25, 15:30 UTCJul 25, 19:30 UTC4h 0m
2026-07-25 JST964 BNE → PER Jul 25, 09:10 UTCJul 25, 14:25 UTC5h 15m
2026-07-25 JST837 BNE → SYD Jul 25, 05:35 UTCJul 25, 06:55 UTC1h 20m
2026-07-25 JST836 BNE → PPP Jul 25, 02:55 UTCJul 25, 04:10 UTC1h 15m
2026-07-24 JST928 BNE → CNS Jul 24, 20:20 UTCJul 25, 01:30 UTC5h 10m
2026-07-23 JST057 BNE → DPS Jul 23, 21:50 UTCJul 24, 10:45 UTC12h 55m
2026-07-23 JST574 MEL → BNE Jul 23, 12:10 UTCJul 23, 13:50 UTC1h 40m
2026-07-22 JST122 NAN → MEL Jul 22, 22:00 UTCJul 23, 09:50 UTC11h 50m
2026-07-21 JST057 BNE → DPS Jul 21, 22:10 UTCJul 22, 01:45 UTC3h 35m
2026-07-21 JST060 SYD → BNE Jul 21, 06:40 UTCJul 21, 19:45 UTC13h 5m
2026-07-20 JST951 CNS → MEL Jul 20, 20:20 UTCJul 21, 02:55 UTC6h 35m
2026-07-19 JST031 MEL → DPS Jul 19, 20:40 UTCJul 20, 09:35 UTC12h 55m
2026-07-18 JST044 DPS → MEL Jul 18, 23:30 UTCJul 19, 12:20 UTC12h 50m
2026-07-18 JST036 MEL → MEL Jul 18, 08:35 UTCJul 18, 20:45 UTC12h 10m
2026-07-18 JST559 BNE → MEL Jul 18, 02:40 UTCJul 18, 04:45 UTC2h 6m
2026-07-17 JST632 AVV → BNE Jul 17, 23:20 UTCJul 18, 01:15 UTC1h 55m
2026-07-17 JST050 AVV → AVV Jul 17, 07:44 UTCJul 17, 21:00 UTC13h 15m
2026-07-17 JST633 BNE → AVV Jul 17, 02:39 UTCJul 17, 04:35 UTC1h 55m
2026-07-17 JST814 SYD → BNE Jul 17, 00:04 UTCJul 17, 01:20 UTC1h 15m
2026-07-16 JST811 BNE → SYD Jul 16, 21:25 UTCJul 16, 22:45 UTC1h 20m
2026-07-16 JST965 PER → BNE Jul 16, 15:30 UTCJul 16, 19:40 UTC4h 10m
2026-07-16 JST964 BNE → PER Jul 16, 09:10 UTCJul 16, 14:05 UTC4h 55m
2026-07-16 JST818 SYD → BNE Jul 16, 06:00 UTCJul 16, 07:15 UTC1h 15m
2026-07-16 JST817 BNE → SYD Jul 16, 03:45 UTCJul 16, 04:55 UTC1h 10m
2026-07-16 JST564 MEL → BNE Jul 16, 00:40 UTCJul 16, 02:30 UTC1h 50m
2026-07-15 JST565 BNE → MEL Jul 15, 21:30 UTCJul 15, 23:25 UTC1h 55m
2026-07-15 JST154 - Jul 15, 05:50 UTCJul 15, 09:10 UTC3h 20m
2026-07-15 JST153 BNE → AKL Jul 15, 01:25 UTCJul 15, 04:15 UTC2h 50m
2026-07-14 JST150 - Jul 14, 19:15 UTCJul 14, 22:35 UTC3h 20m
2026-07-14 JST151 BNE → AKL Jul 14, 14:05 UTCJul 14, 16:55 UTC2h 50m
2026-07-13 JST057 BNE → BNE Jul 13, 21:40 UTCJul 14, 10:35 UTC12h 55m
2026-07-13 JST824 SYD → BNE Jul 13, 11:50 UTCJul 13, 13:05 UTC1h 15m
2026-07-13 JST823 BNE → SYD Jul 13, 09:40 UTCJul 13, 10:55 UTC1h 15m
2026-07-13 JST657 - Jul 13, 07:01 UTCJul 13, 08:25 UTC1h 25m
2026-07-13 JST656 - Jul 13, 04:00 UTCJul 13, 05:25 UTC1h 25m
2026-07-13 JST801 ADL → BNE Jul 13, 00:35 UTCJul 13, 02:45 UTC2h 10m
2026-07-12 JST800 BNE → ADL Jul 12, 21:20 UTCJul 12, 23:40 UTC2h 20m
2026-07-12 JST906 BNE → BNE Jul 12, 09:35 UTCJul 12, 13:50 UTC4h 15m
2026-07-12 JST657 - Jul 12, 06:55 UTCJul 12, 08:15 UTC1h 20m
2026-07-12 JST656 - Jul 12, 04:30 UTCJul 12, 05:55 UTC1h 25m
2026-07-12 JST801 ADL → BNE Jul 12, 00:40 UTCJul 12, 02:40 UTC2h 0m
2026-07-11 JST800 BNE → ADL Jul 11, 21:05 UTCJul 11, 23:40 UTC2h 35m
2026-07-11 JST906 BNE → BNE Jul 11, 09:20 UTCJul 11, 13:45 UTC4h 25m
2026-07-11 JST657 - Jul 11, 06:35 UTCJul 11, 07:55 UTC1h 20m

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

Mode-S 7C4A4A frequently asked

What is Mode-S code 7C4A4A?
7C4A4A is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-OYK.
Where is Mode-S 7C4A4A registered?
Mode-S code 7C4A4A is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4A4A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4A4A, octal 37045112, decimal 8,145,482.
What flights does 7C4A4A operate?
Mode-S 7C4A4A has broadcast 20 distinct callsigns, including JST499, JST498, JST044, JST688, JST089.