Apparatus

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sensors Mode-S transponder

7C4A43

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C4A43
Octal
37045103
Decimal
8,145,475
Country
AU
Tail
VH-OYD
Type
A21N
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
265
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S 7C4A43.

Country allocation

The ICAO 24-bit address 7C4A43 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
JST633 - 9 2026-07-03
JST987 Jetstar Airways 8 2026-05-26
JST986 Jetstar Airways 8 2026-05-26
JST049 - 8 2026-07-03
JST689 - 7 2026-07-20
JST632 - 7 2026-07-03
JST499 - 6 2026-06-27
JST498 - 6 2026-06-26
JST125 - 6 2026-06-27
JST089 - 6 2026-07-09
JST800 Jetstar Airways 5 2026-07-24
JST688 - 5 2026-07-20
JST086 - 5 2026-07-08
JST906 Jetstar Airways 4 2026-07-24
JST8972 Jetstar Airways 4 2026-05-29
JST814 - 4 2026-07-06
JST811 - 4 2026-07-06
JST801 Jetstar Airways 4 2026-07-25
JST657 Jetstar Airways 4 2026-07-25
JST656 Jetstar Airways 4 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 JST057 BNE → DPS Jul 26, 22:10 UTCJul 26, 22:45 UTC35m
2026-07-26 JST059 BNE → DPS Jul 26, 07:05 UTCJul 26, 19:35 UTC12h 30m
2026-07-25 JST104 RAR → BNE Jul 25, 12:30 UTCJul 26, 01:50 UTC13h 20m
2026-07-25 JST657 CBR → BNE Jul 25, 06:35 UTCJul 25, 07:50 UTC1h 15m
2026-07-25 JST656 BNE → CBR Jul 25, 04:00 UTCJul 25, 05:30 UTC1h 30m
2026-07-25 JST801 ADL → BNE Jul 25, 00:35 UTCJul 25, 02:35 UTC2h 0m
2026-07-24 JST800 BNE → ADL Jul 24, 23:15 UTCJul 24, 23:35 UTC20m
2026-07-24 JST800 BNE → ADL Jul 24, 21:25 UTCJul 24, 22:20 UTC55m
2026-07-24 JST906 BNE → TSV Jul 24, 09:15 UTCJul 24, 13:20 UTC4h 5m
2026-07-24 JST657 CBR → BNE Jul 24, 06:50 UTCJul 24, 08:10 UTC1h 20m
2026-07-24 JST656 BNE → CBR Jul 24, 04:20 UTCJul 24, 05:55 UTC1h 35m
2026-07-24 JST801 ADL → BNE Jul 24, 01:10 UTCJul 24, 03:10 UTC2h 0m
2026-07-23 JST800 BNE → ADL Jul 23, 21:30 UTCJul 24, 00:05 UTC2h 35m
2026-07-23 JST965 PER → BNE Jul 23, 15:20 UTCJul 23, 19:25 UTC4h 5m
2026-07-23 JST964 BNE → PER Jul 23, 09:15 UTCJul 23, 14:20 UTC5h 5m
2026-07-23 JST828 SYD → BNE Jul 23, 05:50 UTCJul 23, 07:00 UTC1h 10m
2026-07-23 JST829 BNE → SYD Jul 23, 03:35 UTCJul 23, 04:45 UTC1h 10m
2026-07-22 JST928 BNE → CNS Jul 22, 20:40 UTCJul 23, 02:00 UTC5h 20m
2026-07-21 JST031 MEL → DPS Jul 21, 20:50 UTCJul 22, 10:25 UTC13h 35m
2026-07-21 JST916 MEL → TSV Jul 21, 07:00 UTCJul 21, 13:15 UTC6h 15m
2026-07-20 JST771 ADL → MEL Jul 20, 21:55 UTCJul 20, 22:50 UTC55m
2026-07-20 JST689 - Jul 20, 11:00 UTCJul 20, 11:30 UTC30m
2026-07-20 JST689 - Jul 20, 08:20 UTCJul 20, 08:30 UTC10m
2026-07-20 JST688 - Jul 20, 03:35 UTCJul 20, 04:05 UTC30m
2026-07-20 JST772 MEL → ADL Jul 20, 00:55 UTCJul 20, 02:00 UTC1h 5m
2026-07-19 JST507 SYD → MEL Jul 19, 22:25 UTCJul 19, 23:40 UTC1h 15m
2026-07-19 JST500 MEL → SYD Jul 19, 20:15 UTCJul 19, 21:15 UTC1h 0m
2026-07-19 JST775 ADL → MEL Jul 19, 09:15 UTCJul 19, 10:25 UTC1h 10m
2026-07-19 JST778 MEL → ADL Jul 19, 07:20 UTCJul 19, 08:20 UTC1h 0m
2026-07-17 JST121 MEL → SYD Jul 17, 22:10 UTCJul 18, 09:10 UTC11h 1m
2026-07-17 JST973 - Jul 17, 08:04 UTCJul 17, 11:04 UTC3h 0m
2026-07-17 JST970 MEL → PER Jul 17, 02:59 UTCJul 17, 06:45 UTC3h 45m
2026-07-16 JST437 OOL → MEL Jul 16, 23:40 UTCJul 17, 01:29 UTC1h 50m
2026-07-16 JST432 - Jul 16, 20:45 UTCJul 16, 22:35 UTC1h 50m
2026-07-14 JST032 PER → MEL Jul 14, 23:15 UTCJul 15, 09:45 UTC10h 30m
2026-07-13 JST71 PER → PER Jul 13, 23:50 UTCJul 14, 13:35 UTC13h 45m
2026-07-13 JST76 - Jul 13, 17:20 UTCJul 13, 22:10 UTC4h 50m
2026-07-13 JST76 - Jul 13, 15:55 UTCJul 13, 16:10 UTC15m
2026-07-13 JST75 - Jul 13, 14:00 UTCJul 13, 14:20 UTC20m
2026-07-13 JST75 - Jul 13, 07:30 UTCJul 13, 12:50 UTC5h 20m
2026-07-12 JST80 - Jul 12, 23:50 UTCJul 13, 06:01 UTC6h 10m
2026-07-12 JST81 - Jul 12, 15:01 UTCJul 12, 21:45 UTC6h 45m
2026-07-12 JST107 - Jul 12, 09:45 UTCJul 12, 10:15 UTC30m
2026-07-12 JST083 - Jul 12, 03:10 UTCJul 12, 03:20 UTC10m
2026-07-11 JST108 - Jul 11, 13:20 UTCJul 11, 13:55 UTC35m
2026-07-11 JST108 ADL → PER Jul 11, 08:25 UTCJul 11, 11:25 UTC3h 0m
2026-07-11 JST111 PER → ADL Jul 11, 04:20 UTCJul 11, 06:50 UTC2h 30m
2026-07-10 JST106 PER → DPS Jul 10, 12:55 UTCJul 11, 02:45 UTC13h 50m
2026-07-09 JST088 - Jul 9, 23:55 UTCJul 10, 11:15 UTC11h 20m
2026-07-09 JST089 - Jul 9, 21:15 UTCJul 9, 22:10 UTC55m

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

Mode-S 7C4A43 frequently asked

What is Mode-S code 7C4A43?
7C4A43 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-OYD.
Where is Mode-S 7C4A43 registered?
Mode-S code 7C4A43 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4A43 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4A43, octal 37045103, decimal 8,145,475.
What flights does 7C4A43 operate?
Mode-S 7C4A43 has broadcast 20 distinct callsigns, including JST633, JST987, JST986, JST049, JST689.