Apparatus

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sensors Mode-S transponder

7CAC31

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-8AR · AGUSTA AW-139

Hex
7CAC31
Octal
37126061
Decimal
8,170,545
Country
AU
Tail
VH-8AR
Type
A139
No current signal · last broadcast 16d ago
Flights observed
204
Distinct callsigns
3
Country
AU
Last broadcast
16d ago

Last known position

Most recent position reported by Mode-S 7CAC31.

Country allocation

The ICAO 24-bit address 7CAC31 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 3 distinct

Callsign Airline Flights Last seen
RSCU651 - 197 2026-06-27
RSCU652 - 5 2026-06-28
8AR - 2 2026-06-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-28 RSCU652 - Jun 28, 11:25 UTCJun 28, 11:39 UTC15m
2026-06-28 RSCU652 - Jun 28, 07:20 UTCJun 28, 08:09 UTC50m
2026-06-28 RSCU652 - Jun 28, 06:10 UTCJun 28, 06:34 UTC25m
2026-06-28 RSCU652 - Jun 28, 04:29 UTCJun 28, 04:40 UTC10m
2026-06-28 RSCU652 BUY → BUY Jun 28, 02:39 UTCJun 28, 02:54 UTC15m
2026-06-27 8AR JAD → BUY Jun 27, 07:04 UTCJun 27, 07:49 UTC45m
2026-06-27 RSCU651 - Jun 27, 01:15 UTCJun 27, 02:35 UTC1h 20m
2026-06-25 RSCU651 JAD → JAD Jun 25, 08:34 UTCJun 25, 08:55 UTC20m
2026-06-23 RSCU651 - Jun 23, 16:50 UTCJun 23, 16:59 UTC10m
2026-06-23 RSCU651 - Jun 23, 15:24 UTCJun 23, 15:55 UTC30m
2026-06-23 RSCU651 - Jun 23, 09:59 UTCJun 23, 10:29 UTC30m
2026-06-21 RSCU651 - Jun 21, 22:29 UTCJun 21, 22:34 UTC5m
2026-06-21 RSCU651 - Jun 21, 21:14 UTCJun 21, 21:49 UTC35m
2026-06-21 RSCU651 - Jun 21, 19:39 UTCJun 21, 20:05 UTC25m
2026-06-21 RSCU651 - Jun 21, 10:25 UTCJun 21, 10:34 UTC10m
2026-06-21 RSCU651 - Jun 21, 09:10 UTCJun 21, 09:24 UTC15m
2026-06-21 RSCU651 - Jun 21, 07:29 UTCJun 21, 07:45 UTC15m
2026-06-21 RSCU651 - Jun 21, 04:49 UTCJun 21, 05:00 UTC10m
2026-06-21 RSCU651 - Jun 21, 03:34 UTCJun 21, 03:49 UTC15m
2026-06-21 RSCU651 - Jun 21, 02:35 UTCJun 21, 02:50 UTC15m
2026-06-20 RSCU651 - Jun 20, 16:49 UTCJun 20, 17:49 UTC1h 0m
2026-06-20 RSCU651 JAD → MQZ Jun 20, 14:59 UTCJun 20, 16:00 UTC1h 0m
2026-06-20 RSCU651 - Jun 20, 08:55 UTCJun 20, 09:05 UTC10m
2026-06-20 RSCU651 - Jun 20, 07:34 UTCJun 20, 08:09 UTC35m
2026-06-20 RSCU651 - Jun 20, 05:29 UTCJun 20, 06:24 UTC55m
2026-06-20 RSCU651 - Jun 20, 03:19 UTCJun 20, 03:29 UTC10m
2026-06-20 RSCU651 - Jun 20, 01:55 UTCJun 20, 02:35 UTC40m
2026-06-20 RSCU651 - Jun 20, 00:19 UTCJun 20, 00:44 UTC25m
2026-06-19 RSCU651 - Jun 19, 07:45 UTCJun 19, 07:54 UTC10m
2026-06-19 RSCU651 - Jun 19, 05:59 UTCJun 19, 06:35 UTC35m
2026-06-19 RSCU651 - Jun 19, 03:55 UTCJun 19, 04:25 UTC30m
2026-06-18 RSCU651 - Jun 18, 12:00 UTCJun 18, 12:10 UTC10m
2026-06-18 RSCU651 - Jun 18, 10:15 UTCJun 18, 11:10 UTC55m
2026-06-18 RSCU651 - Jun 18, 06:40 UTCJun 18, 07:55 UTC1h 15m
2026-06-18 RSCU651 - Jun 18, 03:55 UTCJun 18, 04:35 UTC40m
2026-06-18 RSCU651 JAD → JAD Jun 18, 01:20 UTCJun 18, 02:25 UTC1h 5m
2026-06-17 RSCU651 - Jun 17, 14:50 UTCJun 17, 15:25 UTC35m
2026-06-17 RSCU651 - Jun 17, 12:35 UTCJun 17, 13:15 UTC40m
2026-06-17 RSCU651 JAD → JAD Jun 17, 02:45 UTCJun 17, 03:25 UTC40m
2026-06-16 RSCU651 - Jun 16, 12:55 UTCJun 16, 14:05 UTC1h 10m
2026-06-16 RSCU651 - Jun 16, 09:50 UTCJun 16, 10:00 UTC10m
2026-06-16 RSCU651 - Jun 16, 08:10 UTCJun 16, 09:00 UTC50m
2026-06-16 RSCU651 - Jun 16, 05:40 UTCJun 16, 06:25 UTC45m
2026-06-16 RSCU651 JAD → BUY Jun 16, 03:39 UTCJun 16, 04:30 UTC50m
2026-06-15 RSCU651 - Jun 15, 09:35 UTCJun 15, 09:45 UTC10m
2026-06-15 RSCU651 - Jun 15, 08:25 UTCJun 15, 08:40 UTC15m
2026-06-15 RSCU651 - Jun 15, 06:55 UTCJun 15, 07:15 UTC20m
2026-06-15 RSCU651 - Jun 15, 06:10 UTCJun 15, 06:20 UTC10m
2026-06-15 RSCU651 - Jun 15, 05:04 UTCJun 15, 05:20 UTC15m
2026-06-15 RSCU651 - Jun 15, 03:45 UTCJun 15, 04:10 UTC25m

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-8AR page for operator, model, and routing details .

Mode-S 7CAC31 frequently asked

What is Mode-S code 7CAC31?
7CAC31 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-8AR.
Where is Mode-S 7CAC31 registered?
Mode-S code 7CAC31 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7CAC31 broadcasting right now?
No active broadcast right now. Last signal was 16d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7CAC31, octal 37126061, decimal 8,170,545.
What flights does 7CAC31 operate?
Mode-S 7CAC31 has broadcast 3 distinct callsigns, including RSCU651, RSCU652, 8AR.