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
Broadcasting now · callsign JST150 · 34,025 ft
Flights observed
238
Distinct callsigns
20
Country
AU
Last broadcast
2h ago

Current position

7C4A4A is currently broadcasting. Map zoomed to live position.

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 - 9 2026-06-27
JST688 - 8 2026-06-24
JST089 Jetstar Airways 8 2026-05-14
JST108 - 7 2026-06-20
JST125 - 6 2026-06-25
JST031 - 6 2026-07-01
JST689 - 5 2026-06-24
JST128 - 5 2026-06-21
JST126 - 5 2026-06-24
JST974 - 4 2026-06-19
JST973 - 4 2026-06-28
JST801 - 4 2026-07-13
JST800 - 4 2026-07-12
JST657 - 4 2026-07-13
JST656 - 4 2026-07-13
JST111 Jetstar Airways 4 2026-05-28
JST106 Jetstar Airways 4 2026-05-27
JST038 Jetstar Airways 4 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 JST150 - Jul 14, 19:15 UTCJul 14, 19:40 UTC25m
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
2026-07-11 JST656 - Jul 11, 03:55 UTCJul 11, 05:25 UTC1h 30m
2026-07-11 JST801 ADL → BNE Jul 11, 00:45 UTCJul 11, 02:45 UTC2h 0m
2026-07-10 JST800 BNE → ADL Jul 10, 21:00 UTCJul 10, 23:25 UTC2h 25m
2026-07-10 JST154 - Jul 10, 05:50 UTCJul 10, 09:05 UTC3h 15m
2026-07-10 JST153 BNE → AKL Jul 10, 01:25 UTCJul 10, 03:55 UTC2h 30m
2026-07-09 JST150 - Jul 9, 21:00 UTCJul 9, 21:55 UTC55m
2026-07-09 JST150 - Jul 9, 18:35 UTCJul 9, 19:05 UTC30m
2026-07-09 JST151 BNE → AKL Jul 9, 14:25 UTCJul 9, 16:50 UTC2h 25m
2026-07-08 JST057 - Jul 8, 22:05 UTCJul 9, 10:50 UTC12h 45m
2026-07-08 JST037 SYD → BNE Jul 8, 06:35 UTCJul 8, 19:10 UTC12h 35m
2026-07-08 JST951 - Jul 8, 00:55 UTCJul 8, 02:40 UTC1h 45m
2026-07-07 JST950 - Jul 7, 20:35 UTCJul 7, 21:30 UTC55m
2026-07-06 JST825 BNE → SYD Jul 6, 11:00 UTCJul 6, 12:10 UTC1h 10m
2026-07-06 JST657 - Jul 6, 06:20 UTCJul 6, 07:50 UTC1h 30m
2026-07-06 JST656 - Jul 6, 04:00 UTCJul 6, 05:20 UTC1h 20m
2026-07-06 JST801 ADL → BNE Jul 6, 00:35 UTCJul 6, 02:40 UTC2h 5m
2026-07-05 JST800 BNE → ADL Jul 5, 21:10 UTCJul 5, 23:20 UTC2h 10m
2026-07-05 JST824 - Jul 5, 13:05 UTCJul 5, 14:15 UTC1h 10m
2026-07-05 JST823 BNE → SYD Jul 5, 11:00 UTCJul 5, 12:15 UTC1h 15m
2026-07-05 JST828 SYD → BNE Jul 5, 08:15 UTCJul 5, 09:30 UTC1h 15m
2026-07-05 JST536 MEL → SYD Jul 5, 05:00 UTCJul 5, 06:05 UTC1h 5m
2026-07-05 JST537 SYD → MEL Jul 5, 02:55 UTCJul 5, 04:10 UTC1h 15m
2026-07-05 JST508 MEL → SYD Jul 5, 00:35 UTCJul 5, 01:45 UTC1h 10m
2026-07-04 JST505 SYD → MEL Jul 4, 22:30 UTCJul 4, 23:35 UTC1h 5m
2026-07-04 JST206 - Jul 4, 06:20 UTCJul 4, 09:40 UTC3h 20m
2026-07-04 JST205 SYD → AKL Jul 4, 01:45 UTCJul 4, 04:15 UTC2h 30m
2026-07-03 JST037 SYD → SYD Jul 3, 06:35 UTCJul 3, 20:10 UTC13h 35m
2026-07-03 JST204 - Jul 3, 01:05 UTCJul 3, 04:15 UTC3h 10m
2026-07-02 JST203 SYD → AKL Jul 2, 20:55 UTCJul 2, 23:30 UTC2h 35m
2026-07-01 JST031 MEL → SYD Jul 1, 20:50 UTCJul 2, 09:45 UTC12h 55m
2026-07-01 JST916 MEL → MEL Jul 1, 07:10 UTCJul 1, 13:45 UTC6h 35m
2026-07-01 JST975 PER → MEL Jul 1, 01:50 UTCJul 1, 05:05 UTC3h 15m
2026-06-30 JST972 MEL → PER Jun 30, 20:40 UTCJul 1, 00:20 UTC3h 40m
2026-06-30 JST949 CNS → MEL Jun 30, 14:20 UTCJun 30, 15:00 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-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?
Yes. Mode-S 7C4A4A is currently airborne.
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.