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
Broadcasting now · callsign JST71 · 34,000 ft
Flights observed
140
Distinct callsigns
20
Country
AU
Last broadcast
3h ago

Current position

7C4A57 is currently broadcasting. Map zoomed to live position.

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
JST499 Jetstar Airways 7 2026-05-07
JST089 Jetstar Airways 7 2026-05-21
JST088 Jetstar Airways 7 2026-05-19
JST498 Jetstar Airways 6 2026-05-06
JST087 Jetstar Airways 6 2026-05-20
JST111 Jetstar Airways 5 2026-05-16
JST043 Jetstar Airways 5 2026-05-18
JST689 Jetstar Airways 4 2026-05-04
JST633 Jetstar Airways 4 2026-05-22
JST632 Jetstar Airways 4 2026-05-22
JST106 Jetstar Airways 4 2026-05-17
JST974 Jetstar Airways 3 2026-05-23
JST965 - 3 2026-04-13
JST81 Jetstar Airways 3 2026-05-28
JST80 Jetstar Airways 3 2026-05-28
JST71 Jetstar Airways 3 2026-05-30
JST688 Jetstar Airways 3 2026-05-04
JST128 Jetstar Airways 3 2026-05-03
JST126 Jetstar Airways 3 2026-05-07
JST125 Jetstar Airways 3 2026-05-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 JST71 PER → HKT May 30, 00:25 UTCMay 30, 00:55 UTC30m
2026-05-29 JST76 BKK → PER May 29, 16:20 UTCMay 29, 22:40 UTC6h 20m
2026-05-29 JST75 PER → BKK May 29, 07:20 UTCMay 29, 14:15 UTC6h 55m
2026-05-28 JST80 MNL → PER May 28, 23:20 UTCMay 29, 05:45 UTC6h 25m
2026-05-28 JST81 PER → MNL May 28, 15:05 UTCMay 28, 21:25 UTC6h 20m
2026-05-27 JST71 PER → HKT May 27, 23:45 UTCMay 28, 13:20 UTC13h 35m
2026-05-26 JST80 MNL → PER May 26, 23:35 UTCMay 27, 05:59 UTC6h 25m
2026-05-26 JST81 PER → MNL May 26, 15:05 UTCMay 26, 21:49 UTC6h 45m
2026-05-26 JST98 SIN → PER May 26, 06:49 UTCMay 26, 12:00 UTC5h 10m
2026-05-25 JST97 PER → SIN May 25, 23:54 UTCMay 26, 04:45 UTC4h 50m
2026-05-25 JST80 MNL → PER May 25, 05:55 UTCMay 25, 06:30 UTC35m
2026-05-24 JST81 PER → MNL May 24, 15:10 UTCMay 24, 21:40 UTC6h 30m
2026-05-23 JST71 PER → HKT May 23, 23:45 UTCMay 24, 13:35 UTC13h 50m
2026-05-23 JST974 ADL → PER May 23, 07:10 UTCMay 23, 10:45 UTC3h 35m
2026-05-23 JST559 BNE → MEL May 23, 02:25 UTCMay 23, 04:20 UTC1h 54m
2026-05-22 JST632 AVV → BNE May 22, 23:05 UTCMay 23, 00:55 UTC1h 50m
2026-05-22 JST049 AVV → DPS May 22, 07:45 UTCMay 22, 20:25 UTC12h 40m
2026-05-22 JST633 BNE → AVV May 22, 02:15 UTCMay 22, 04:20 UTC2h 5m
2026-05-21 JST632 AVV → BNE May 21, 23:15 UTCMay 22, 01:15 UTC2h 0m
2026-05-21 JST050 DPS → AVV May 21, 19:15 UTCMay 21, 20:30 UTC1h 15m
2026-05-21 JST089 DPS → NTL May 21, 11:45 UTCMay 21, 11:55 UTC10m
2026-05-20 JST086 DPS → SIN May 20, 23:40 UTCMay 21, 00:10 UTC30m
2026-05-20 JST087 SIN → DPS May 20, 20:35 UTCMay 20, 21:05 UTC30m
2026-05-19 JST088 NTL → DPS May 19, 23:25 UTCMay 20, 00:10 UTC45m
2026-05-19 JST089 DPS → NTL May 19, 20:30 UTCMay 19, 21:10 UTC40m
2026-05-19 JST088 NTL → DPS May 19, 09:35 UTCMay 19, 09:45 UTC10m
2026-05-18 JST043 MEL → DPS May 18, 23:50 UTCMay 19, 01:05 UTC1h 15m
2026-05-18 JST044 DPS → MEL May 18, 11:40 UTCMay 18, 12:15 UTC35m
2026-05-18 JST083 DRW → DPS May 18, 03:01 UTCMay 18, 03:10 UTC10m
2026-05-17 JST106 PER → DPS May 17, 12:45 UTCMay 17, 13:15 UTC30m
2026-05-17 JST974 ADL → PER May 17, 06:40 UTCMay 17, 10:10 UTC3h 30m
2026-05-17 JST975 PER → ADL May 17, 01:45 UTCMay 17, 05:15 UTC3h 30m
2026-05-16 JST972 MEL → PER May 16, 20:35 UTCMay 17, 00:05 UTC3h 30m
2026-05-16 JST971 PER → MEL May 16, 16:00 UTCMay 16, 19:25 UTC3h 25m
2026-05-16 JST108 ADL → PER May 16, 08:36 UTCMay 16, 11:21 UTC2h 45m
2026-05-16 JST111 DPS → PER May 16, 04:15 UTCMay 16, 07:01 UTC2h 46m
2026-05-15 JST106 PER → DPS May 15, 12:45 UTCMay 16, 02:35 UTC13h 49m
2026-05-15 JST974 ADL → PER May 15, 06:35 UTCMay 15, 10:25 UTC3h 50m
2026-05-15 JST975 PER → ADL May 15, 01:45 UTCMay 15, 05:00 UTC3h 15m
2026-05-14 JST972 MEL → PER May 14, 20:30 UTCMay 15, 00:20 UTC3h 50m
2026-05-13 JST044 DPS → MEL May 13, 23:30 UTCMay 14, 12:35 UTC13h 5m
2026-05-13 JST087 SIN → DPS May 13, 20:30 UTCMay 13, 20:55 UTC25m
2026-05-12 JST043 MEL → DPS May 12, 23:50 UTCMay 13, 20:55 UTC21h 5m
2026-05-12 JST043 MEL → DPS May 12, 23:40 UTCMay 13, 20:55 UTC21h 15m
2026-05-12 JST035 MEL → DPS May 12, 08:00 UTCMay 12, 20:50 UTC12h 50m
2026-05-11 JST049 AVV → DPS May 11, 08:00 UTCMay 11, 21:00 UTC13h 0m
2026-05-11 JST633 BNE → AVV May 11, 03:35 UTCMay 11, 04:15 UTC40m
2026-05-11 JST633 BNE → AVV May 11, 02:15 UTCMay 11, 03:30 UTC1h 15m
2026-05-10 JST632 AVV → BNE May 10, 23:15 UTCMay 11, 01:10 UTC1h 55m
2026-05-10 JST049 AVV → DPS May 10, 08:00 UTCMay 10, 20:50 UTC12h 50m

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?
Yes. Mode-S 7C4A57 is currently airborne.
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 JST499, JST089, JST088, JST498, JST087.