Apparatus

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sensors Mode-S transponder

7C4A54

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C4A54
Octal
37045124
Decimal
8,145,492
Country
AU
Tail
VH-OYU
Type
A21N
No current signal · last broadcast 27m ago
Flights observed
275
Distinct callsigns
20
Country
AU
Last broadcast
27m ago

Last known position

Most recent position reported by Mode-S 7C4A54.

Country allocation

The ICAO 24-bit address 7C4A54 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 13 2026-06-01
JST987 Jetstar Airways 12 2026-06-01
JST508 Jetstar Airways 11 2026-05-31
JST505 Jetstar Airways 11 2026-05-31
JST964 - 8 2026-07-13
JST565 - 8 2026-07-12
JST564 - 8 2026-07-13
JST965 - 7 2026-07-13
JST829 - 6 2026-07-13
JST828 - 6 2026-07-13
JST800 - 6 2026-07-13
JST057 - 6 2026-07-07
JST801 - 5 2026-07-14
JST499 Jetstar Airways 5 2026-06-08
JST498 Jetstar Airways 5 2026-06-07
JST154 - 5 2026-07-06
JST153 - 5 2026-07-06
JST151 - 5 2026-07-05
JST150 - 5 2026-07-05
JST059 - 5 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 JST811 BNE → SYD Jul 14, 21:10 UTCJul 14, 22:35 UTC1h 25m
2026-07-14 JST657 - Jul 14, 13:30 UTCJul 14, 14:50 UTC1h 20m
2026-07-14 JST656 - Jul 14, 05:00 UTCJul 14, 06:25 UTC1h 25m
2026-07-14 JST801 ADL → BNE Jul 14, 00:55 UTCJul 14, 03:00 UTC2h 5m
2026-07-13 JST800 BNE → ADL Jul 13, 21:30 UTCJul 13, 23:50 UTC2h 20m
2026-07-13 JST965 PER → BNE Jul 13, 16:05 UTCJul 13, 20:05 UTC4h 0m
2026-07-13 JST964 BNE → PER Jul 13, 09:50 UTCJul 13, 14:50 UTC5h 0m
2026-07-13 JST828 SYD → BNE Jul 13, 07:05 UTCJul 13, 08:15 UTC1h 10m
2026-07-13 JST829 BNE → SYD Jul 13, 04:45 UTCJul 13, 05:55 UTC1h 10m
2026-07-13 JST564 MEL → BNE Jul 13, 01:50 UTCJul 13, 03:40 UTC1h 50m
2026-07-12 JST565 BNE → MEL Jul 12, 22:25 UTCJul 13, 00:40 UTC2h 15m
2026-07-12 JST965 PER → BNE Jul 12, 16:30 UTCJul 12, 20:35 UTC4h 5m
2026-07-12 JST964 BNE → PER Jul 12, 10:10 UTCJul 12, 14:55 UTC4h 45m
2026-07-12 JST828 SYD → BNE Jul 12, 06:20 UTCJul 12, 07:25 UTC1h 5m
2026-07-12 JST829 BNE → SYD Jul 12, 03:50 UTCJul 12, 05:05 UTC1h 15m
2026-07-12 JST564 MEL → BNE Jul 12, 00:50 UTCJul 12, 02:35 UTC1h 45m
2026-07-11 JST565 BNE → MEL Jul 11, 21:30 UTCJul 11, 23:45 UTC2h 15m
2026-07-11 JST965 PER → BNE Jul 11, 15:30 UTCJul 11, 19:25 UTC3h 55m
2026-07-11 JST964 BNE → PER Jul 11, 09:20 UTCJul 11, 14:25 UTC5h 5m
2026-07-11 JST828 - Jul 11, 06:05 UTCJul 11, 07:10 UTC1h 5m
2026-07-11 JST829 BNE → SYD Jul 11, 03:30 UTCJul 11, 04:50 UTC1h 20m
2026-07-11 JST564 MEL → BNE Jul 11, 00:20 UTCJul 11, 02:05 UTC1h 45m
2026-07-10 JST565 BNE → MEL Jul 10, 21:15 UTCJul 10, 23:20 UTC2h 5m
2026-07-10 JST824 SYD → BNE Jul 10, 11:45 UTCJul 10, 13:00 UTC1h 15m
2026-07-10 JST823 BNE → SYD Jul 10, 09:15 UTCJul 10, 10:35 UTC1h 20m
2026-07-10 JST566 MEL → BNE Jul 10, 05:50 UTCJul 10, 07:50 UTC2h 0m
2026-07-10 JST567 BNE → MEL Jul 10, 02:35 UTCJul 10, 04:35 UTC2h 0m
2026-07-10 JST814 SYD → BNE Jul 10, 00:05 UTCJul 10, 01:20 UTC1h 15m
2026-07-09 JST811 BNE → SYD Jul 9, 21:20 UTCJul 9, 22:55 UTC1h 35m
2026-07-09 JST965 PER → BNE Jul 9, 15:45 UTCJul 9, 19:35 UTC3h 50m
2026-07-09 JST964 BNE → PER Jul 9, 09:20 UTCJul 9, 14:30 UTC5h 10m
2026-07-09 JST828 SYD → BNE Jul 9, 06:20 UTCJul 9, 07:35 UTC1h 15m
2026-07-09 JST829 BNE → SYD Jul 9, 04:00 UTCJul 9, 05:05 UTC1h 5m
2026-07-09 JST564 MEL → BNE Jul 9, 00:50 UTCJul 9, 02:40 UTC1h 50m
2026-07-08 JST565 BNE → MEL Jul 8, 21:35 UTCJul 8, 23:35 UTC2h 0m
2026-07-07 JST057 BNE → BNE Jul 7, 21:50 UTCJul 8, 10:35 UTC12h 45m
2026-07-07 JST059 BNE → BNE Jul 7, 06:50 UTCJul 7, 19:10 UTC12h 20m
2026-07-06 JST104 BNE → BNE Jul 6, 12:40 UTCJul 7, 02:15 UTC13h 35m
2026-07-06 JST154 - Jul 6, 05:40 UTCJul 6, 08:50 UTC3h 10m
2026-07-06 JST153 BNE → AKL Jul 6, 01:15 UTCJul 6, 03:55 UTC2h 40m
2026-07-05 JST150 - Jul 5, 18:45 UTCJul 5, 22:10 UTC3h 25m
2026-07-05 JST151 BNE → AKL Jul 5, 14:05 UTCJul 5, 16:40 UTC2h 35m
2026-07-05 JST154 - Jul 5, 05:40 UTCJul 5, 09:10 UTC3h 30m
2026-07-05 JST153 BNE → AKL Jul 5, 01:35 UTCJul 5, 04:10 UTC2h 35m
2026-07-04 JST150 - Jul 4, 20:25 UTCJul 4, 23:50 UTC3h 25m
2026-07-04 JST151 BNE → AKL Jul 4, 15:35 UTCJul 4, 18:10 UTC2h 35m
2026-07-04 JST570 MEL → BNE Jul 4, 09:40 UTCJul 4, 11:30 UTC1h 50m
2026-07-04 JST569 BNE → MEL Jul 4, 06:40 UTCJul 4, 08:40 UTC2h 0m
2026-07-04 JST818 SYD → BNE Jul 4, 04:40 UTCJul 4, 05:45 UTC1h 5m
2026-07-04 JST817 BNE → SYD Jul 4, 02:20 UTCJul 4, 03:30 UTC1h 10m

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

Mode-S 7C4A54 frequently asked

What is Mode-S code 7C4A54?
7C4A54 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-OYU.
Where is Mode-S 7C4A54 registered?
Mode-S code 7C4A54 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4A54 broadcasting right now?
No active broadcast right now. Last signal was 27m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4A54, octal 37045124, decimal 8,145,492.
What flights does 7C4A54 operate?
Mode-S 7C4A54 has broadcast 20 distinct callsigns, including JST986, JST987, JST508, JST505, JST964.