Apparatus

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sensors Mode-S transponder

7C7A90

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-YHU · CESSNA 172 Skyhawk · operated by AIRFLITE PTY LTD

Hex
7C7A90
Octal
37075220
Decimal
8,157,840
Country
AU
Tail
VH-YHU
Type
C172
No current signal · last broadcast 43m ago
Flights observed
191
Distinct callsigns
1
Country
AU
Last broadcast
43m ago

Last known position

Most recent position reported by Mode-S 7C7A90.

Country allocation

The ICAO 24-bit address 7C7A90 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
YHU - 191 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 YHU JAD → JAD Jul 14, 01:40 UTCJul 14, 01:55 UTC15m
2026-07-14 YHU JAD → JAD Jul 14, 01:00 UTCJul 14, 01:25 UTC25m
2026-07-13 YHU - Jul 13, 12:10 UTCJul 13, 12:50 UTC40m
2026-07-13 YHU JAD → JAD Jul 13, 10:55 UTCJul 13, 11:40 UTC45m
2026-07-13 YHU JAD → JAD Jul 13, 05:31 UTCJul 13, 06:55 UTC1h 25m
2026-07-13 YHU - Jul 13, 04:05 UTCJul 13, 05:15 UTC1h 10m
2026-07-13 YHU - Jul 13, 02:01 UTCJul 13, 03:25 UTC1h 25m
2026-07-13 YHU JAD → JAD Jul 13, 00:15 UTCJul 13, 01:25 UTC1h 10m
2026-07-12 YHU JAD → JAD Jul 12, 02:25 UTCJul 12, 02:50 UTC25m
2026-07-09 YHU JAD → JAD Jul 9, 11:25 UTCJul 9, 12:05 UTC40m
2026-07-09 YHU JAD → JAD Jul 9, 09:55 UTCJul 9, 10:45 UTC50m
2026-07-09 YHU - Jul 9, 07:05 UTCJul 9, 08:15 UTC1h 10m
2026-07-09 YHU - Jul 9, 05:40 UTCJul 9, 06:00 UTC20m
2026-07-09 YHU JAD → JAD Jul 9, 03:10 UTCJul 9, 04:25 UTC1h 15m
2026-07-08 YHU JAD → JAD Jul 8, 08:20 UTCJul 8, 09:00 UTC40m
2026-07-08 YHU JAD → JAD Jul 8, 07:40 UTCJul 8, 08:05 UTC25m
2026-07-08 YHU JAD → JAD Jul 8, 03:35 UTCJul 8, 06:25 UTC2h 50m
2026-07-07 YHU JAD → JAD Jul 7, 06:00 UTCJul 7, 08:10 UTC2h 10m
2026-07-07 YHU JAD → JAD Jul 7, 01:30 UTCJul 7, 01:55 UTC25m
2026-07-07 YHU JAD → JAD Jul 7, 00:45 UTCJul 7, 01:15 UTC30m
2026-07-06 YHU JAD → JAD Jul 6, 11:15 UTCJul 6, 11:55 UTC40m
2026-07-06 YHU JAD → JAD Jul 6, 10:05 UTCJul 6, 10:45 UTC40m
2026-07-06 YHU - Jul 6, 07:20 UTCJul 6, 07:35 UTC15m
2026-07-06 YHU - Jul 6, 05:40 UTCJul 6, 06:05 UTC25m
2026-07-06 YHU JAD → JAD Jul 6, 04:25 UTCJul 6, 04:45 UTC20m
2026-07-06 YHU JAD → JAD Jul 6, 03:30 UTCJul 6, 04:10 UTC40m
2026-07-06 YHU JAD → JAD Jul 6, 01:05 UTCJul 6, 02:10 UTC1h 5m
2026-07-03 YHU JAD → JAD Jul 3, 10:20 UTCJul 3, 10:50 UTC30m
2026-07-03 YHU JAD → JAD Jul 3, 06:40 UTCJul 3, 07:20 UTC40m
2026-07-02 YHU - Jul 2, 07:25 UTCJul 2, 07:50 UTC25m
2026-07-02 YHU - Jul 2, 05:40 UTCJul 2, 06:00 UTC20m
2026-07-02 YHU JAD → JAD Jul 2, 04:00 UTCJul 2, 04:45 UTC45m
2026-07-02 YHU JAD → JAD Jul 2, 01:15 UTCJul 2, 02:00 UTC45m
2026-07-02 YHU JAD → JAD Jul 2, 00:45 UTCJul 2, 01:05 UTC20m
2026-07-01 YHU JAD → JAD Jul 1, 04:45 UTCJul 1, 05:30 UTC45m
2026-06-26 YHU JAD → JAD Jun 26, 07:30 UTCJun 26, 08:45 UTC1h 15m
2026-06-24 YHU - Jun 24, 08:14 UTCJun 24, 09:09 UTC55m
2026-06-24 YHU - Jun 24, 07:05 UTCJun 24, 07:40 UTC35m
2026-06-24 YHU - Jun 24, 03:55 UTCJun 24, 04:34 UTC40m
2026-06-24 YHU - Jun 24, 01:49 UTCJun 24, 02:09 UTC20m
2026-06-23 YHU JAD → JAD Jun 23, 05:39 UTCJun 23, 06:19 UTC40m
2026-06-23 YHU JAD → JAD Jun 23, 01:50 UTCJun 23, 02:34 UTC45m
2026-06-23 YHU JAD → JAD Jun 23, 01:10 UTCJun 23, 01:30 UTC20m
2026-06-22 YHU - Jun 22, 08:35 UTCJun 22, 09:04 UTC30m
2026-06-22 YHU - Jun 22, 06:35 UTCJun 22, 07:30 UTC55m
2026-06-20 YHU - Jun 20, 06:29 UTCJun 20, 06:39 UTC10m
2026-06-20 YHU JAD → RTS Jun 20, 00:49 UTCJun 20, 01:14 UTC25m
2026-06-19 YHU JAD → JAD Jun 19, 05:40 UTCJun 19, 06:14 UTC35m
2026-06-19 YHU JAD → JAD Jun 19, 02:54 UTCJun 19, 03:39 UTC45m
2026-06-19 YHU JAD → JAD Jun 19, 00:55 UTCJun 19, 01:29 UTC35m

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

Mode-S 7C7A90 frequently asked

What is Mode-S code 7C7A90?
7C7A90 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-YHU.
Where is Mode-S 7C7A90 registered?
Mode-S code 7C7A90 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7A90 broadcasting right now?
No active broadcast right now. Last signal was 43m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C7A90, octal 37075220, decimal 8,157,840.
What flights does 7C7A90 operate?
Mode-S 7C7A90 has broadcast 1 distinct callsign, including YHU.