Apparatus

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sensors Mode-S transponder

7C4A45

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C4A45
Octal
37045105
Decimal
8,145,477
Country
AU
Tail
VH-OYF
Type
A21N
No current signal · last broadcast 42m ago
Flights observed
253
Distinct callsigns
20
Country
AU
Last broadcast
42m ago

Last known position

Most recent position reported by Mode-S 7C4A45.

Country allocation

The ICAO 24-bit address 7C4A45 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
JST203 Jetstar Airways 11 2026-05-02
JST204 Jetstar Airways 9 2026-05-02
JST987 - 8 2026-07-13
JST039 - 8 2026-07-07
JST986 - 7 2026-07-13
JST508 - 7 2026-07-12
JST505 - 7 2026-07-12
JST108 - 7 2026-06-25
JST043 - 7 2026-06-22
JST038 Jetstar Airways 6 2026-05-20
JST031 - 6 2026-07-06
JST037 Jetstar Airways 5 2026-05-09
JST964 - 4 2026-04-14
JST514 - 4 2026-07-12
JST511 - 4 2026-07-12
JST499 - 4 2026-06-25
JST089 - 4 2026-06-23
JST088 - 4 2026-06-24
JST040 Jetstar Airways 4 2026-05-20
JST032 - 4 2026-07-05

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 JST950 SYD → SYD Jul 13, 20:35 UTCJul 14, 02:55 UTC6h 20m
2026-07-13 JST987 PER → SYD Jul 13, 08:20 UTCJul 13, 12:15 UTC3h 55m
2026-07-13 JST986 SYD → PER Jul 13, 02:20 UTCJul 13, 06:50 UTC4h 30m
2026-07-12 JST508 MEL → SYD Jul 12, 23:45 UTCJul 13, 00:40 UTC55m
2026-07-12 JST505 SYD → MEL Jul 12, 21:10 UTCJul 12, 22:35 UTC1h 25m
2026-07-12 JST957 SYD → SYD Jul 12, 05:40 UTCJul 12, 11:45 UTC6h 5m
2026-07-12 JST514 MEL → SYD Jul 12, 03:10 UTCJul 12, 04:10 UTC1h 0m
2026-07-12 JST511 - Jul 12, 01:05 UTCJul 12, 02:25 UTC1h 20m
2026-07-11 JST813 BNE → SYD Jul 11, 22:45 UTCJul 12, 00:01 UTC1h 15m
2026-07-11 JST810 SYD → BNE Jul 11, 20:30 UTCJul 11, 21:40 UTC1h 10m
2026-07-11 JST987 PER → SYD Jul 11, 08:10 UTCJul 11, 12:00 UTC3h 50m
2026-07-11 JST986 SYD → PER Jul 11, 02:10 UTCJul 11, 06:45 UTC4h 35m
2026-07-10 JST405 - Jul 10, 23:20 UTCJul 11, 00:30 UTC1h 10m
2026-07-10 JST402 - Jul 10, 21:30 UTCJul 10, 22:30 UTC1h 0m
2026-07-10 JST987 PER → SYD Jul 10, 08:20 UTCJul 10, 12:15 UTC3h 55m
2026-07-10 JST986 SYD → PER Jul 10, 02:25 UTCJul 10, 06:55 UTC4h 30m
2026-07-09 JST508 MEL → SYD Jul 9, 23:45 UTCJul 10, 00:55 UTC1h 10m
2026-07-09 JST505 SYD → MEL Jul 9, 21:15 UTCJul 9, 22:30 UTC1h 15m
2026-07-09 JST987 PER → SYD Jul 9, 08:20 UTCJul 9, 12:05 UTC3h 45m
2026-07-09 JST986 SYD → PER Jul 9, 02:15 UTCJul 9, 07:00 UTC4h 45m
2026-07-08 JST508 MEL → SYD Jul 8, 23:55 UTCJul 9, 01:00 UTC1h 5m
2026-07-08 JST505 SYD → MEL Jul 8, 21:10 UTCJul 8, 22:10 UTC1h 0m
2026-07-07 JST039 SYD → SYD Jul 7, 20:30 UTCJul 8, 09:15 UTC12h 45m
2026-07-06 JST031 MEL → SYD Jul 6, 20:50 UTCJul 7, 09:45 UTC12h 55m
2026-07-05 JST032 MEL → MEL Jul 5, 20:55 UTCJul 6, 09:15 UTC12h 20m
2026-07-05 JST449 - Jul 5, 12:25 UTCJul 5, 14:15 UTC1h 50m
2026-07-05 JST446 - Jul 5, 09:45 UTCJul 5, 11:30 UTC1h 45m
2026-07-05 JST521 SYD → MEL Jul 5, 07:15 UTCJul 5, 08:30 UTC1h 15m
2026-07-05 JST516 MEL → SYD Jul 5, 05:10 UTCJul 5, 06:15 UTC1h 5m
2026-07-05 JST793 - Jul 5, 01:35 UTCJul 5, 03:40 UTC2h 5m
2026-07-04 JST792 MEL → MCY Jul 4, 22:25 UTCJul 5, 00:25 UTC2h 0m
2026-07-04 JST971 PER → MEL Jul 4, 16:15 UTCJul 4, 19:35 UTC3h 20m
2026-07-03 JST71 PER → PER Jul 3, 23:50 UTCJul 4, 13:05 UTC13h 15m
2026-07-03 JST76 - Jul 3, 16:55 UTCJul 3, 21:50 UTC4h 55m
2026-07-03 JST76 - Jul 3, 15:35 UTCJul 3, 16:00 UTC25m
2026-07-03 JST75 PER → BKK Jul 3, 07:05 UTCJul 3, 13:45 UTC6h 40m
2026-07-03 JST858 ADL → PER Jul 3, 02:10 UTCJul 3, 05:00 UTC2h 50m
2026-07-02 JST857 PER → ADL Jul 2, 22:25 UTCJul 3, 01:00 UTC2h 35m
2026-07-02 JST98 - Jul 2, 06:41 UTCJul 2, 11:35 UTC4h 54m
2026-07-02 JST97 - Jul 2, 00:05 UTCJul 2, 04:55 UTC4h 50m
2026-07-01 JST69 PER → PER Jul 1, 08:35 UTCJul 1, 21:55 UTC13h 20m
2026-06-30 JST80 MNL → PER Jun 30, 23:30 UTCJul 1, 05:50 UTC6h 20m
2026-06-30 JST81 PER → MNL Jun 30, 15:05 UTCJun 30, 21:40 UTC6h 35m
2026-06-30 JST974 MEL → PER Jun 30, 07:00 UTCJun 30, 10:50 UTC3h 50m
2026-06-30 JST975 PER → MEL Jun 30, 01:55 UTCJun 30, 05:00 UTC3h 5m
2026-06-29 JST972 MEL → PER Jun 29, 20:40 UTCJun 30, 00:30 UTC3h 50m
2026-06-29 JST971 PER → MEL Jun 29, 16:00 UTCJun 29, 19:05 UTC3h 5m
2026-06-29 JST974 MEL → PER Jun 29, 06:44 UTCJun 29, 10:55 UTC4h 10m
2026-06-29 JST975 PER → MEL Jun 29, 02:00 UTCJun 29, 05:15 UTC3h 15m
2026-06-28 JST972 MEL → PER Jun 28, 20:59 UTCJun 29, 00:44 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-OYF page for operator, model, and routing details .

Mode-S 7C4A45 frequently asked

What is Mode-S code 7C4A45?
7C4A45 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-OYF.
Where is Mode-S 7C4A45 registered?
Mode-S code 7C4A45 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C4A45 broadcasting right now?
No active broadcast right now. Last signal was 42m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C4A45, octal 37045105, decimal 8,145,477.
What flights does 7C4A45 operate?
Mode-S 7C4A45 has broadcast 20 distinct callsigns, including JST203, JST204, JST987, JST039, JST986.