Apparatus

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sensors Mode-S transponder

7C7CC6

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C7CC6
Octal
37076306
Decimal
8,158,406
Country
AU
Tail
VH-YXK
Type
A139
No current signal · last broadcast Jul 26, 06:15 UTC
Flights observed
190
Distinct callsigns
2
Country
AU
Last broadcast
Jul 26, 06:15 UTC

Last known position

Most recent position reported by Mode-S 7C7CC6.

Country allocation

The ICAO 24-bit address 7C7CC6 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 2 distinct

Callsign Airline Flights Last seen
HM2 - 173 2026-07-21
HM5 - 17 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 HM5 - Jul 26, 05:55 UTCJul 26, 06:15 UTC20m
2026-07-26 HM5 - Jul 26, 04:40 UTCJul 26, 04:55 UTC15m
2026-07-25 HM5 - Jul 25, 11:30 UTCJul 25, 11:45 UTC15m
2026-07-25 HM5 - Jul 25, 10:30 UTCJul 25, 11:00 UTC30m
2026-07-25 HM5 - Jul 25, 09:05 UTCJul 25, 09:35 UTC30m
2026-07-24 HM5 - Jul 24, 09:15 UTCJul 24, 09:35 UTC20m
2026-07-24 HM5 - Jul 24, 07:10 UTCJul 24, 07:30 UTC20m
2026-07-24 HM5 MEB → MEB Jul 24, 01:35 UTCJul 24, 03:00 UTC1h 25m
2026-07-23 HM5 - Jul 23, 10:55 UTCJul 23, 11:05 UTC10m
2026-07-23 HM5 - Jul 23, 09:10 UTCJul 23, 09:25 UTC15m
2026-07-23 HM5 - Jul 23, 08:10 UTCJul 23, 08:20 UTC10m
2026-07-23 HM5 - Jul 23, 07:35 UTCJul 23, 07:40 UTC5m
2026-07-23 HM5 - Jul 23, 06:10 UTCJul 23, 06:35 UTC25m
2026-07-23 HM5 - Jul 23, 04:55 UTCJul 23, 05:25 UTC30m
2026-07-23 HM5 - Jul 23, 00:55 UTCJul 23, 01:00 UTC5m
2026-07-22 HM5 - Jul 22, 23:25 UTCJul 22, 23:40 UTC15m
2026-07-22 HM5 - Jul 22, 22:05 UTCJul 22, 22:15 UTC10m
2026-07-21 HM2 - Jul 21, 22:45 UTCJul 21, 23:10 UTC25m
2026-07-20 HM2 - Jul 20, 12:40 UTCJul 20, 13:05 UTC25m
2026-07-20 HM2 - Jul 20, 11:20 UTCJul 20, 11:55 UTC35m
2026-07-19 HM2 - Jul 19, 05:35 UTCJul 19, 05:50 UTC15m
2026-07-19 HM2 - Jul 19, 02:10 UTCJul 19, 02:20 UTC10m
2026-07-19 HM2 - Jul 19, 00:05 UTCJul 19, 01:10 UTC1h 5m
2026-07-18 HM2 - Jul 18, 04:55 UTCJul 18, 05:10 UTC15m
2026-07-18 HM2 - Jul 18, 03:35 UTCJul 18, 03:55 UTC20m
2026-07-17 HM2 - Jul 17, 10:50 UTCJul 17, 11:15 UTC25m
2026-07-17 HM2 - Jul 17, 09:50 UTCJul 17, 10:20 UTC30m
2026-07-16 HM2 - Jul 16, 08:05 UTCJul 16, 08:30 UTC25m
2026-07-16 HM2 - Jul 16, 06:15 UTCJul 16, 06:40 UTC25m
2026-07-15 HM2 - Jul 15, 11:45 UTCJul 15, 12:10 UTC25m
2026-07-15 HM2 - Jul 15, 10:35 UTCJul 15, 11:05 UTC30m
2026-07-13 HM2 - Jul 13, 06:50 UTCJul 13, 07:15 UTC25m
2026-07-13 HM2 - Jul 13, 05:55 UTCJul 13, 06:10 UTC15m
2026-07-13 HM2 - Jul 13, 04:50 UTCJul 13, 05:10 UTC20m
2026-07-11 HM2 - Jul 11, 16:50 UTCJul 11, 17:05 UTC15m
2026-07-11 HM2 - Jul 11, 15:30 UTCJul 11, 15:50 UTC20m
2026-07-10 HM2 - Jul 10, 07:10 UTCJul 10, 07:25 UTC15m
2026-07-10 HM2 - Jul 10, 05:30 UTCJul 10, 05:50 UTC20m
2026-07-08 HM2 - Jul 8, 05:30 UTCJul 8, 06:05 UTC35m
2026-07-08 HM2 - Jul 8, 01:45 UTCJul 8, 02:20 UTC35m
2026-07-07 HM2 - Jul 7, 06:15 UTCJul 7, 06:35 UTC20m
2026-07-07 HM2 - Jul 7, 04:55 UTCJul 7, 05:20 UTC25m
2026-07-05 HM2 - Jul 5, 06:15 UTCJul 5, 06:40 UTC25m
2026-07-05 HM2 - Jul 5, 05:00 UTCJul 5, 05:25 UTC25m
2026-07-01 HM2 - Jul 1, 13:50 UTCJul 1, 14:10 UTC20m
2026-07-01 HM2 - Jul 1, 12:35 UTCJul 1, 13:05 UTC30m
2026-06-30 HM2 - Jun 30, 15:00 UTCJun 30, 15:20 UTC20m
2026-06-30 HM2 - Jun 30, 13:25 UTCJun 30, 13:55 UTC30m
2026-06-28 HM2 - Jun 28, 09:10 UTCJun 28, 09:39 UTC30m
2026-06-28 HM2 - Jun 28, 08:09 UTCJun 28, 08:39 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-YXK page for operator, model, and routing details .

Mode-S 7C7CC6 frequently asked

What is Mode-S code 7C7CC6?
7C7CC6 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-YXK.
Where is Mode-S 7C7CC6 registered?
Mode-S code 7C7CC6 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7CC6 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 06:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C7CC6, octal 37076306, decimal 8,158,406.
What flights does 7C7CC6 operate?
Mode-S 7C7CC6 has broadcast 2 distinct callsigns, including HM2, HM5.