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sensors Mode-S transponder

7C7AFC

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-YKU · DIAMOND DA-42 Guardian · operated by AUSTRALIAN INTERNATIONAL AVIATION COLLEGE PTY LTD

Hex
7C7AFC
Octal
37075374
Decimal
8,157,948
Country
AU
Tail
VH-YKU
Type
DA42
No current signal · last broadcast 2h ago
Flights observed
40
Distinct callsigns
1
Country
AU
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 7C7AFC.

Country allocation

The ICAO 24-bit address 7C7AFC 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 1 distinct

Callsign Airline Flights Last seen
YKU - 40 2026-07-14

Recent flights last 40

DateFlightRouteTakeoffLandingDuration
2026-07-14 YKU PQQ → PQQ Jul 14, 04:10 UTCJul 14, 05:10 UTC1h 0m
2026-07-14 YKU - Jul 14, 01:15 UTCJul 14, 01:25 UTC10m
2026-07-14 YKU PQQ → PQQ Jul 14, 00:35 UTCJul 14, 01:10 UTC35m
2026-07-12 YKU PQQ → PQQ Jul 12, 23:25 UTCJul 13, 01:05 UTC1h 40m
2026-07-11 YKU PQQ → PQQ Jul 11, 06:05 UTCJul 11, 06:45 UTC40m
2026-07-10 YKU PQQ → PQQ Jul 10, 07:50 UTCJul 10, 10:05 UTC2h 15m
2026-07-09 YKU - Jul 9, 02:10 UTCJul 9, 02:45 UTC35m
2026-07-09 YKU PQQ → PQQ Jul 9, 01:50 UTCJul 9, 02:05 UTC15m
2026-07-08 YKU - Jul 8, 05:25 UTCJul 8, 05:30 UTC5m
2026-07-08 YKU PQQ → PQQ Jul 8, 02:05 UTCJul 8, 03:45 UTC1h 40m
2026-07-07 YKU PQQ → PQQ Jul 7, 03:20 UTCJul 7, 05:55 UTC2h 35m
2026-07-02 YKU PQQ → PQQ Jul 2, 04:25 UTCJul 2, 04:40 UTC15m
2026-07-02 YKU - Jul 2, 03:35 UTCJul 2, 04:20 UTC45m
2026-07-02 YKU PQQ → PQQ Jul 2, 03:20 UTCJul 2, 03:30 UTC10m
2026-07-02 YKU - Jul 2, 01:20 UTCJul 2, 02:20 UTC1h 0m
2026-07-02 YKU PQQ → PQQ Jul 2, 01:00 UTCJul 2, 01:05 UTC5m
2026-06-26 YKU - Jun 26, 03:54 UTCJun 26, 04:55 UTC1h 0m
2026-06-26 YKU PQQ → PQQ Jun 26, 03:39 UTCJun 26, 03:50 UTC10m
2026-06-25 YKU - Jun 25, 03:20 UTCJun 25, 03:24 UTC5m
2026-06-25 YKU PQQ → PQQ Jun 25, 02:30 UTCJun 25, 03:15 UTC45m
2026-06-24 YKU - Jun 24, 06:55 UTCJun 24, 07:05 UTC10m
2026-06-24 YKU - Jun 24, 06:35 UTCJun 24, 06:50 UTC15m
2026-06-24 YKU PQQ → PQQ Jun 24, 06:15 UTCJun 24, 06:29 UTC15m
2026-06-24 YKU PQQ → PQQ Jun 24, 02:20 UTCJun 24, 03:35 UTC1h 15m
2026-06-23 YKU - Jun 23, 23:59 UTCJun 24, 00:55 UTC55m
2026-06-23 YKU PQQ → PQQ Jun 23, 22:49 UTCJun 23, 23:55 UTC1h 5m
2026-06-18 YKU PQQ → PQQ Jun 18, 23:40 UTCJun 19, 00:55 UTC1h 14m
2026-06-17 YKU PQQ → PQQ Jun 17, 22:55 UTCJun 17, 23:05 UTC10m
2026-06-17 YKU PQQ → PQQ Jun 17, 00:55 UTCJun 17, 01:50 UTC55m
2026-06-12 YKU PQQ → PQQ Jun 12, 07:20 UTCJun 12, 09:55 UTC2h 35m
2026-06-12 YKU - Jun 12, 07:05 UTCJun 12, 07:15 UTC10m
2026-06-12 YKU - Jun 12, 06:45 UTCJun 12, 07:00 UTC15m
2026-06-12 YKU PQQ → PQQ Jun 12, 00:15 UTCJun 12, 01:50 UTC1h 36m
2026-06-11 YKU PQQ → PQQ Jun 11, 01:45 UTCJun 11, 03:55 UTC2h 10m
2026-06-09 YKU - Jun 9, 23:20 UTCJun 10, 02:10 UTC2h 50m
2026-06-09 YKU PQQ → PQQ Jun 9, 01:15 UTCJun 9, 02:15 UTC1h 0m
2026-06-04 YKU - Jun 4, 09:50 UTCJun 4, 10:05 UTC15m
2026-06-04 YKU PQQ → PQQ Jun 4, 09:15 UTCJun 4, 09:40 UTC25m
2026-06-04 YKU PQQ → PQQ Jun 4, 08:30 UTCJun 4, 08:35 UTC5m
2026-05-30 YKU PQQ → PQQ May 30, 02:00 UTCMay 30, 04:40 UTC2h 40m

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-YKU page for operator, model, and routing details .

Mode-S 7C7AFC frequently asked

What is Mode-S code 7C7AFC?
7C7AFC is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-YKU.
Where is Mode-S 7C7AFC registered?
Mode-S code 7C7AFC is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7AFC 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 7C7AFC, octal 37075374, decimal 8,157,948.
What flights does 7C7AFC operate?
Mode-S 7C7AFC has broadcast 1 distinct callsign, including YKU.