Apparatus

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sensors Mode-S transponder

7CF831

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to A97-441 · Lockheed Martin C-130J-30 Hercules

Hex
7CF831
Octal
37174061
Decimal
8,190,001
Country
AU
Tail
A97-441
Type
C30J
No current signal · last broadcast 2h ago
Flights observed
94
Distinct callsigns
16
Country
AU
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7CF831.

Country allocation

The ICAO 24-bit address 7CF831 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 16 distinct

Callsign Airline Flights Last seen
ASY586 - 20 2026-06-15
TROJ11 - 13 2026-07-06
TROJ37 - 11 2026-06-26
ASY630 - 7 2026-06-24
ASY557 - 6 2026-05-13
TROJ77 - 5 2026-04-17
TROJ72 - 5 2026-04-16
TROJ66 - 5 2026-04-26
TROJ54 - 5 2026-05-19
TROJ34 - 5 2026-06-30
ASY491 - 4 2026-04-20
ASY587 - 3 2026-05-29
TROJ55 - 2 2026-05-15
TROJ53 - 1 2026-06-05
TROJ35 - 1 2026-06-03
TROJ16 - 1 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 TROJ16 - Jul 17, 23:50 UTCJul 18, 00:50 UTC1h 0m
2026-07-06 TROJ11 - Jul 6, 07:10 UTCJul 6, 08:20 UTC1h 10m
2026-07-05 TROJ11 - Jul 5, 23:35 UTCJul 6, 00:05 UTC30m
2026-07-05 TROJ11 - Jul 5, 05:45 UTCJul 5, 06:45 UTC1h 0m
2026-07-05 TROJ11 - Jul 5, 00:55 UTCJul 5, 01:55 UTC1h 0m
2026-07-04 TROJ11 - Jul 4, 06:15 UTCJul 4, 06:50 UTC35m
2026-07-04 TROJ11 - Jul 4, 02:10 UTCJul 4, 03:45 UTC1h 35m
2026-07-03 TROJ11 XRH → MEL Jul 3, 22:00 UTCJul 3, 23:40 UTC1h 40m
2026-07-03 TROJ11 - Jul 3, 03:20 UTCJul 3, 05:35 UTC2h 15m
2026-07-02 TROJ11 MEL → XRH Jul 2, 07:15 UTCJul 3, 05:35 UTC22h 20m
2026-07-02 TROJ11 - Jul 2, 01:10 UTCJul 2, 05:30 UTC4h 20m
2026-07-01 TROJ11 - Jul 1, 04:45 UTCJul 1, 05:30 UTC45m
2026-07-01 TROJ11 - Jul 1, 01:10 UTCJul 1, 02:05 UTC55m
2026-06-30 TROJ11 - Jun 30, 23:00 UTCJun 30, 23:50 UTC50m
2026-06-30 TROJ34 - Jun 30, 01:55 UTCJun 30, 02:20 UTC25m
2026-06-29 TROJ34 - Jun 29, 23:44 UTCJun 30, 01:00 UTC1h 15m
2026-06-29 TROJ34 - Jun 29, 05:59 UTCJun 29, 07:30 UTC1h 30m
2026-06-29 TROJ34 - Jun 29, 01:25 UTCJun 29, 01:34 UTC10m
2026-06-28 TROJ34 - Jun 28, 02:25 UTCJun 28, 02:54 UTC30m
2026-06-26 TROJ37 - Jun 26, 06:15 UTCJun 26, 08:24 UTC2h 10m
2026-06-26 TROJ37 - Jun 26, 05:24 UTCJun 26, 05:44 UTC20m
2026-06-26 TROJ37 - Jun 26, 01:15 UTCJun 26, 01:39 UTC25m
2026-06-25 TROJ37 - Jun 25, 22:04 UTCJun 25, 23:24 UTC1h 20m
2026-06-25 TROJ37 - Jun 25, 04:10 UTCJun 25, 05:39 UTC1h 30m
2026-06-25 TROJ37 - Jun 25, 02:35 UTCJun 25, 03:04 UTC30m
2026-06-25 TROJ37 - Jun 25, 01:35 UTCJun 25, 02:05 UTC30m
2026-06-24 TROJ37 - Jun 24, 23:54 UTCJun 25, 01:09 UTC1h 15m
2026-06-24 ASY630 - Jun 24, 04:15 UTCJun 24, 04:44 UTC30m
2026-06-23 ASY630 - Jun 23, 01:50 UTCJun 23, 02:40 UTC50m
2026-06-21 ASY630 - Jun 21, 04:44 UTCJun 21, 05:35 UTC50m
2026-06-20 ASY630 - Jun 20, 23:34 UTCJun 20, 23:50 UTC15m
2026-06-20 ASY630 - Jun 20, 02:14 UTCJun 20, 02:49 UTC35m
2026-06-19 ASY630 - Jun 19, 01:54 UTCJun 19, 06:04 UTC4h 10m
2026-06-18 ASY630 - Jun 18, 23:55 UTCJun 19, 00:40 UTC44m
2026-06-15 ASY586 - Jun 15, 05:45 UTCJun 15, 06:20 UTC35m
2026-06-15 ASY586 - Jun 15, 04:40 UTCJun 15, 05:10 UTC30m
2026-06-14 ASY586 - Jun 14, 23:50 UTCJun 14, 23:59 UTC10m
2026-06-14 ASY586 - Jun 14, 05:00 UTCJun 14, 05:30 UTC30m
2026-06-14 ASY586 - Jun 14, 03:15 UTCJun 14, 03:55 UTC40m
2026-06-14 ASY586 - Jun 14, 00:45 UTCJun 14, 01:25 UTC40m
2026-06-13 ASY586 - Jun 13, 09:00 UTCJun 13, 09:40 UTC40m
2026-06-13 ASY586 - Jun 13, 03:50 UTCJun 13, 04:40 UTC50m
2026-06-12 ASY586 ICN → HND Jun 12, 23:55 UTCJun 13, 02:15 UTC2h 20m
2026-06-11 ASY586 - Jun 11, 05:15 UTCJun 11, 05:50 UTC35m
2026-06-11 ASY586 - Jun 11, 01:00 UTCJun 11, 03:25 UTC2h 25m
2026-06-10 ASY586 - Jun 10, 09:15 UTCJun 10, 10:10 UTC55m
2026-06-10 ASY586 - Jun 10, 06:00 UTCJun 10, 06:25 UTC25m
2026-06-10 ASY586 - Jun 10, 03:50 UTCJun 10, 04:00 UTC10m
2026-06-10 ASY586 - Jun 10, 01:55 UTCJun 10, 02:35 UTC40m
2026-06-09 ASY586 - Jun 9, 08:10 UTCJun 9, 08:40 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 A97-441 page for operator, model, and routing details .

Mode-S 7CF831 frequently asked

What is Mode-S code 7CF831?
7CF831 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to A97-441.
Where is Mode-S 7CF831 registered?
Mode-S code 7CF831 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7CF831 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7CF831, octal 37174061, decimal 8,190,001.
What flights does 7CF831 operate?
Mode-S 7CF831 has broadcast 16 distinct callsigns, including ASY586, TROJ11, TROJ37, ASY630, ASY557.