Apparatus

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sensors Mode-S transponder

7C7CC3

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-YXH · AGUSTA AW-139 · operated by BABCOCK MISSION CRITICAL SERVICES AUSTRALASIA PTY LTD

Hex
7C7CC3
Octal
37076303
Decimal
8,158,403
Country
AU
Tail
VH-YXH
Type
A139
No current signal · last broadcast Jul 25, 16:40 UTC
Flights observed
261
Distinct callsigns
3
Country
AU
Last broadcast
Jul 25, 16:40 UTC

Last known position

Most recent position reported by Mode-S 7C7CC3.

Country allocation

The ICAO 24-bit address 7C7CC3 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
HM5 - 135 2026-07-21
HM4 - 116 2026-06-10
HM2 - 10 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 HM2 - Jul 25, 16:20 UTCJul 25, 16:40 UTC20m
2026-07-25 HM2 - Jul 25, 15:20 UTCJul 25, 15:45 UTC25m
2026-07-23 HM2 - Jul 23, 14:40 UTCJul 23, 15:00 UTC20m
2026-07-23 HM2 - Jul 23, 11:45 UTCJul 23, 12:10 UTC25m
2026-07-23 HM2 - Jul 23, 08:20 UTCJul 23, 08:35 UTC15m
2026-07-23 HM2 - Jul 23, 07:15 UTCJul 23, 07:40 UTC25m
2026-07-23 HM2 - Jul 23, 04:25 UTCJul 23, 04:40 UTC15m
2026-07-23 HM2 - Jul 23, 03:45 UTCJul 23, 04:20 UTC35m
2026-07-23 HM2 - Jul 23, 02:00 UTCJul 23, 02:20 UTC20m
2026-07-22 HM2 - Jul 22, 00:55 UTCJul 22, 01:15 UTC20m
2026-07-21 HM5 - Jul 21, 15:20 UTCJul 21, 15:30 UTC10m
2026-07-21 HM5 - Jul 21, 14:05 UTCJul 21, 14:30 UTC25m
2026-07-21 HM5 - Jul 21, 12:30 UTCJul 21, 12:50 UTC20m
2026-07-21 HM5 - Jul 21, 09:25 UTCJul 21, 09:35 UTC10m
2026-07-21 HM5 - Jul 21, 07:55 UTCJul 21, 08:25 UTC30m
2026-07-21 HM5 - Jul 21, 05:55 UTCJul 21, 06:30 UTC35m
2026-07-20 HM5 MEB → MEB Jul 20, 22:40 UTCJul 20, 22:50 UTC10m
2026-07-20 HM5 - Jul 20, 11:05 UTCJul 20, 11:10 UTC5m
2026-07-20 HM5 - Jul 20, 09:20 UTCJul 20, 09:35 UTC15m
2026-07-20 HM5 - Jul 20, 08:30 UTCJul 20, 08:50 UTC20m
2026-07-20 HM5 - Jul 20, 02:20 UTCJul 20, 02:35 UTC15m
2026-07-19 HM5 - Jul 19, 23:30 UTCJul 20, 00:00 UTC30m
2026-07-19 HM5 MEB → MEB Jul 19, 21:50 UTCJul 19, 22:40 UTC50m
2026-07-19 HM5 MEB → MEB Jul 19, 08:50 UTCJul 19, 08:55 UTC5m
2026-07-19 HM5 MEB → MEB Jul 19, 08:25 UTCJul 19, 08:45 UTC20m
2026-07-19 HM5 - Jul 19, 02:20 UTCJul 19, 02:30 UTC10m
2026-07-19 HM5 - Jul 19, 01:05 UTCJul 19, 01:30 UTC25m
2026-07-18 HM5 - Jul 18, 23:30 UTCJul 19, 00:05 UTC35m
2026-07-18 HM5 - Jul 18, 05:35 UTCJul 18, 06:00 UTC25m
2026-07-18 HM5 - Jul 18, 04:10 UTCJul 18, 04:40 UTC30m
2026-07-18 HM5 - Jul 18, 03:10 UTCJul 18, 03:30 UTC20m
2026-07-18 HM5 - Jul 18, 01:34 UTCJul 18, 02:19 UTC45m
2026-07-17 HM5 - Jul 17, 23:50 UTCJul 18, 00:10 UTC20m
2026-07-17 HM5 - Jul 17, 23:35 UTCJul 17, 23:45 UTC10m
2026-07-17 HM5 - Jul 17, 23:20 UTCJul 17, 23:25 UTC5m
2026-07-17 HM5 - Jul 17, 23:00 UTCJul 17, 23:10 UTC10m
2026-07-17 HM5 - Jul 17, 07:14 UTCJul 17, 07:40 UTC25m
2026-07-17 HM5 - Jul 17, 05:39 UTCJul 17, 06:05 UTC25m
2026-07-17 HM5 MEB → MEB Jul 17, 01:39 UTCJul 17, 01:55 UTC15m
2026-07-16 HM5 - Jul 16, 08:35 UTCJul 16, 08:55 UTC20m
2026-07-16 HM5 - Jul 16, 07:50 UTCJul 16, 08:10 UTC20m
2026-07-16 HM5 - Jul 16, 06:45 UTCJul 16, 07:10 UTC25m
2026-07-16 HM5 MEB → MEB Jul 16, 04:55 UTCJul 16, 05:05 UTC10m
2026-07-16 HM5 - Jul 16, 03:20 UTCJul 16, 03:35 UTC15m
2026-07-16 HM5 - Jul 16, 01:45 UTCJul 16, 02:10 UTC25m
2026-07-14 HM5 - Jul 14, 08:55 UTCJul 14, 09:00 UTC5m
2026-07-14 HM5 - Jul 14, 07:45 UTCJul 14, 08:00 UTC15m
2026-07-14 HM5 - Jul 14, 06:15 UTCJul 14, 06:30 UTC15m
2026-07-13 HM5 MEB → MEB Jul 13, 05:50 UTCJul 13, 06:35 UTC45m
2026-07-11 HM5 MEB → MEB Jul 11, 09:35 UTCJul 11, 10:05 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 VH-YXH page for operator, model, and routing details .

Mode-S 7C7CC3 frequently asked

What is Mode-S code 7C7CC3?
7C7CC3 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-YXH.
Where is Mode-S 7C7CC3 registered?
Mode-S code 7C7CC3 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7CC3 broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 16:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C7CC3, octal 37076303, decimal 8,158,403.
What flights does 7C7CC3 operate?
Mode-S 7C7CC3 has broadcast 3 distinct callsigns, including HM5, HM4, HM2.