Apparatus

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sensors Mode-S transponder

7C4A56

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C4A56
Octal
37045126
Decimal
8,145,494
Country
AU
Tail
VH-OYW
Type
A21N
No current signal · last broadcast 9h ago
Flights observed
229
Distinct callsigns
20
Country
AU
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 7C4A56.

Country allocation

The ICAO 24-bit address 7C4A56 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
JST689 - 9 2026-07-13
JST499 - 9 2026-07-13
JST498 - 9 2026-07-12
JST688 - 8 2026-07-13
JST508 - 8 2026-07-08
JST986 - 7 2026-07-08
JST505 - 7 2026-07-07
JST987 - 6 2026-07-08
JST126 Jetstar Airways 6 2026-05-26
JST110 - 6 2026-07-11
JST031 - 6 2026-07-10
JST125 - 5 2026-07-13
JST120 - 5 2026-07-04
JST858 Jetstar Airways 4 2026-06-03
JST127 - 4 2026-07-12
JST116 - 4 2026-07-11
JST038 - 4 2026-07-04
JST037 - 4 2026-07-02
JST034 Jetstar Airways 4 2026-06-12
JST857 Jetstar Airways 3 2026-06-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 JST125 - Jul 13, 21:00 UTCJul 13, 21:30 UTC30m
2026-07-13 JST689 - Jul 13, 12:05 UTCJul 13, 12:35 UTC30m
2026-07-13 JST688 - Jul 13, 04:50 UTCJul 13, 05:25 UTC35m
2026-07-13 JST499 - Jul 13, 01:30 UTCJul 13, 03:45 UTC2h 15m
2026-07-12 JST498 - Jul 12, 22:25 UTCJul 13, 00:35 UTC2h 10m
2026-07-12 JST127 ADL → ADL Jul 12, 09:35 UTCJul 12, 20:40 UTC11h 5m
2026-07-11 JST110 PER → ADL Jul 11, 22:55 UTCJul 12, 07:55 UTC9h 0m
2026-07-11 JST116 PER → PER Jul 11, 08:45 UTCJul 11, 16:55 UTC8h 10m
2026-07-10 JST031 MEL → PER Jul 10, 20:40 UTCJul 11, 07:05 UTC10h 25m
2026-07-10 JST916 MEL → MEL Jul 10, 07:30 UTCJul 10, 13:50 UTC6h 20m
2026-07-10 JST519 SYD → MEL Jul 10, 05:00 UTCJul 10, 06:05 UTC1h 5m
2026-07-10 JST512 MEL → SYD Jul 10, 02:45 UTCJul 10, 03:45 UTC1h 0m
2026-07-09 JST523 SYD → MEL Jul 9, 07:10 UTCJul 9, 08:20 UTC1h 10m
2026-07-09 JST518 MEL → SYD Jul 9, 05:00 UTCJul 9, 06:10 UTC1h 10m
2026-07-09 JST513 SYD → MEL Jul 9, 02:45 UTCJul 9, 03:50 UTC1h 5m
2026-07-09 JST815 BNE → SYD Jul 9, 00:20 UTCJul 9, 01:30 UTC1h 10m
2026-07-08 JST812 SYD → BNE Jul 8, 21:45 UTCJul 8, 22:55 UTC1h 10m
2026-07-08 JST987 PER → SYD Jul 8, 08:15 UTCJul 8, 12:00 UTC3h 45m
2026-07-08 JST986 - Jul 8, 03:45 UTCJul 8, 07:00 UTC3h 15m
2026-07-08 JST986 - Jul 8, 02:25 UTCJul 8, 03:00 UTC35m
2026-07-08 JST508 MEL → SYD Jul 8, 00:05 UTCJul 8, 01:10 UTC1h 5m
2026-07-07 JST505 SYD → MEL Jul 7, 21:10 UTCJul 7, 22:35 UTC1h 25m
2026-07-07 JST825 BNE → SYD Jul 7, 11:05 UTCJul 7, 12:15 UTC1h 10m
2026-07-07 JST822 SYD → BNE Jul 7, 08:40 UTCJul 7, 09:50 UTC1h 10m
2026-07-07 JST417 - Jul 7, 06:25 UTCJul 7, 07:30 UTC1h 5m
2026-07-07 JST412 - Jul 7, 04:30 UTCJul 7, 05:30 UTC1h 0m
2026-07-06 JST951 SYD → SYD Jul 6, 20:30 UTCJul 7, 03:05 UTC6h 35m
2026-07-05 JST040 SYD → SYD Jul 5, 20:55 UTCJul 6, 10:10 UTC13h 15m
2026-07-04 JST120 SYD → SYD Jul 4, 23:35 UTCJul 5, 09:15 UTC9h 40m
2026-07-04 JST038 SYD → SYD Jul 4, 06:35 UTCJul 4, 20:10 UTC13h 35m
2026-07-03 JST112 SYD → SYD Jul 3, 11:40 UTCJul 4, 02:00 UTC14h 20m
2026-07-02 JST120 SYD → SYD Jul 2, 23:30 UTCJul 3, 09:15 UTC9h 45m
2026-07-02 JST038 - Jul 2, 19:15 UTCJul 2, 20:10 UTC55m
2026-07-02 JST037 - Jul 2, 06:41 UTCJul 2, 07:35 UTC54m
2026-07-01 JST112 - Jul 1, 12:15 UTCJul 2, 01:50 UTC13h 35m
2026-06-30 JST039 SYD → SYD Jun 30, 21:00 UTCJul 1, 10:20 UTC13h 20m
2026-06-30 JST120 SYD → SYD Jun 30, 00:00 UTCJun 30, 10:00 UTC10h 1m
2026-06-29 JST037 SYD → SYD Jun 29, 07:05 UTCJun 29, 20:30 UTC13h 25m
2026-06-28 JST112 SYD → SYD Jun 28, 11:55 UTCJun 29, 02:09 UTC14h 15m
2026-06-27 JST039 SYD → SYD Jun 27, 20:55 UTCJun 28, 10:04 UTC13h 10m
2026-06-27 JST206 - Jun 27, 06:35 UTCJun 27, 09:24 UTC2h 50m
2026-06-27 JST205 SYD → AKL Jun 27, 02:09 UTCJun 27, 04:54 UTC2h 45m
2026-06-26 JST038 SYD → SYD Jun 26, 06:39 UTCJun 26, 20:24 UTC13h 45m
2026-06-26 JST204 - Jun 26, 01:10 UTCJun 26, 04:04 UTC2h 55m
2026-06-25 JST203 SYD → AKL Jun 25, 20:54 UTCJun 25, 23:44 UTC2h 50m
2026-06-24 JST039 SYD → SYD Jun 24, 20:35 UTCJun 25, 10:04 UTC13h 30m
2026-06-24 JST821 BNE → SYD Jun 24, 09:59 UTCJun 24, 11:14 UTC1h 15m
2026-06-24 JST820 SYD → BNE Jun 24, 07:30 UTCJun 24, 08:45 UTC1h 15m
2026-06-23 JST912 SYD → SYD Jun 23, 22:10 UTCJun 24, 03:40 UTC5h 30m
2026-06-23 JST987 PER → SYD Jun 23, 08:20 UTCJun 23, 12:05 UTC3h 45m

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

Mode-S 7C4A56 frequently asked

What is Mode-S code 7C4A56?
7C4A56 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-OYW.
Where is Mode-S 7C4A56 registered?
Mode-S code 7C4A56 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4A56 broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4A56, octal 37045126, decimal 8,145,494.
What flights does 7C4A56 operate?
Mode-S 7C4A56 has broadcast 20 distinct callsigns, including JST689, JST499, JST498, JST688, JST508.