Apparatus

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sensors Mode-S transponder

7C4A57

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C4A57
Octal
37045127
Decimal
8,145,495
Country
AU
Tail
VH-OYX
Type
A21N
No current signal · last broadcast Jul 26, 11:15 UTC
Flights observed
301
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 11:15 UTC

Last known position

Most recent position reported by Mode-S 7C4A57.

Country allocation

The ICAO 24-bit address 7C4A57 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
JST986 Jetstar Airways 15 2026-07-25
JST987 Jetstar Airways 11 2026-07-25
JST505 Jetstar Airways 11 2026-07-24
JST499 - 11 2026-07-11
JST508 Jetstar Airways 10 2026-07-24
JST037 Jetstar Airways 10 2026-07-23
JST498 - 9 2026-07-10
JST689 - 7 2026-07-11
JST688 - 7 2026-07-11
JST089 Jetstar Airways 7 2026-05-21
JST088 Jetstar Airways 7 2026-05-19
JST087 Jetstar Airways 6 2026-05-20
JST204 - 5 2026-07-07
JST203 - 5 2026-07-06
JST111 Jetstar Airways 5 2026-05-16
JST043 Jetstar Airways 5 2026-05-18
JST039 Jetstar Airways 5 2026-07-21
JST813 - 4 2026-07-17
JST810 - 4 2026-07-17
JST633 Jetstar Airways 4 2026-05-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JST531 SYD → MEL Jul 26, 10:55 UTCJul 26, 11:10 UTC15m
2026-07-26 JST531 SYD → MEL Jul 26, 08:45 UTCJul 26, 10:05 UTC1h 20m
2026-07-26 JST787 MCY → SYD Jul 26, 06:10 UTCJul 26, 07:35 UTC1h 26m
2026-07-26 JST786 SYD → MCY Jul 26, 03:55 UTCJul 26, 05:10 UTC1h 15m
2026-07-25 JST912 SYD → TSV Jul 25, 21:00 UTCJul 26, 02:35 UTC5h 35m
2026-07-25 JST987 PER → SYD Jul 25, 08:15 UTCJul 25, 12:15 UTC4h 0m
2026-07-25 JST986 SYD → PER Jul 25, 02:30 UTCJul 25, 06:50 UTC4h 20m
2026-07-24 JST508 MEL → SYD Jul 24, 23:30 UTCJul 25, 00:55 UTC1h 25m
2026-07-24 JST505 SYD → MEL Jul 24, 21:15 UTCJul 24, 22:35 UTC1h 20m
2026-07-23 JST120 NAN → SYD Jul 23, 23:15 UTCJul 24, 09:05 UTC9h 50m
2026-07-23 JST037 SYD → DPS Jul 23, 06:35 UTCJul 23, 20:10 UTC13h 35m
2026-07-22 JST112 PER → DPS Jul 22, 11:45 UTCJul 23, 02:25 UTC14h 40m
2026-07-21 JST039 SYD → DPS Jul 21, 20:40 UTCJul 21, 21:35 UTC55m
2026-07-21 JST119 SYD → NAN Jul 21, 00:45 UTCJul 21, 10:00 UTC9h 15m
2026-07-20 JST037 SYD → SYD Jul 20, 06:35 UTCJul 20, 20:15 UTC13h 40m
2026-07-19 JST951 SYD → SYD Jul 19, 20:35 UTCJul 20, 02:55 UTC6h 20m
2026-07-19 JST987 PER → SYD Jul 19, 08:15 UTCJul 19, 12:05 UTC3h 50m
2026-07-19 JST986 - Jul 19, 06:25 UTCJul 19, 06:55 UTC30m
2026-07-19 JST986 - Jul 19, 02:20 UTCJul 19, 04:20 UTC2h 0m
2026-07-18 JST508 MEL → SYD Jul 18, 23:35 UTCJul 19, 00:40 UTC1h 5m
2026-07-18 JST505 SYD → MEL Jul 18, 21:05 UTCJul 18, 22:10 UTC1h 5m
2026-07-18 JST957 SYD → SYD Jul 18, 06:15 UTCJul 18, 12:20 UTC6h 5m
2026-07-18 JST514 MEL → SYD Jul 18, 03:50 UTCJul 18, 05:00 UTC1h 10m
2026-07-18 JST511 SYD → MEL Jul 18, 01:00 UTCJul 18, 02:09 UTC1h 10m
2026-07-17 JST813 BNE → SYD Jul 17, 22:25 UTCJul 17, 23:35 UTC1h 10m
2026-07-17 JST810 - Jul 17, 20:15 UTCJul 17, 21:25 UTC1h 10m
2026-07-17 JST769 ADL → SYD Jul 17, 10:20 UTCJul 17, 12:00 UTC1h 40m
2026-07-17 JST766 SYD → ADL Jul 17, 07:35 UTCJul 17, 09:15 UTC1h 40m
2026-07-17 JST520 MEL → SYD Jul 17, 05:15 UTCJul 17, 06:29 UTC1h 15m
2026-07-17 JST517 SYD → MEL Jul 17, 02:45 UTCJul 17, 03:45 UTC1h 0m
2026-07-16 JST763 ADL → SYD Jul 16, 23:49 UTCJul 17, 01:29 UTC1h 40m
2026-07-16 JST776 MEL → ADL Jul 16, 21:35 UTCJul 16, 22:35 UTC1h 0m
2026-07-16 JST033 MEL → MEL Jul 16, 06:35 UTCJul 16, 19:10 UTC12h 35m
2026-07-15 JST33 MEL → MEL Jul 15, 21:10 UTCJul 16, 04:25 UTC7h 15m
2026-07-15 JST033 MEL → MEL Jul 15, 06:30 UTCJul 15, 19:25 UTC12h 55m
2026-07-14 JST33 MEL → MEL Jul 14, 20:45 UTCJul 15, 04:15 UTC7h 29m
2026-07-14 JST948 MEL → MEL Jul 14, 08:05 UTCJul 14, 15:05 UTC7h 0m
2026-07-14 JST451 - Jul 14, 04:40 UTCJul 14, 06:50 UTC2h 10m
2026-07-14 JST448 - Jul 14, 02:00 UTCJul 14, 03:40 UTC1h 40m
2026-07-13 JST777 ADL → MEL Jul 13, 23:40 UTCJul 14, 00:40 UTC1h 0m
2026-07-13 JST776 MEL → ADL Jul 13, 21:40 UTCJul 13, 22:45 UTC1h 5m
2026-07-13 JST449 - Jul 13, 11:20 UTCJul 13, 13:10 UTC1h 50m
2026-07-13 JST446 - Jul 13, 08:40 UTCJul 13, 10:20 UTC1h 40m
2026-07-13 JST521 - Jul 13, 06:25 UTCJul 13, 07:40 UTC1h 15m
2026-07-13 JST516 MEL → SYD Jul 13, 04:10 UTCJul 13, 05:10 UTC1h 0m
2026-07-13 JST793 MCY → MEL Jul 13, 00:25 UTCJul 13, 02:40 UTC2h 15m
2026-07-12 JST792 MEL → MCY Jul 12, 21:15 UTCJul 12, 23:10 UTC1h 55m
2026-07-11 JST032 ADL → MEL Jul 11, 21:35 UTCJul 12, 09:20 UTC11h 45m
2026-07-11 JST689 - Jul 11, 12:10 UTCJul 11, 12:45 UTC35m
2026-07-11 JST688 - Jul 11, 04:55 UTCJul 11, 05:25 UTC30m

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

Mode-S 7C4A57 frequently asked

What is Mode-S code 7C4A57?
7C4A57 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-OYX.
Where is Mode-S 7C4A57 registered?
Mode-S code 7C4A57 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4A57 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4A57, octal 37045127, decimal 8,145,495.
What flights does 7C4A57 operate?
Mode-S 7C4A57 has broadcast 20 distinct callsigns, including JST986, JST987, JST505, JST499, JST508.