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sensors Mode-S transponder

7C7D18

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-YZU · PIPER PA-44 Seminole · operated by SOUTHERN AVIATION PTY LTD

Hex
7C7D18
Octal
37076430
Decimal
8,158,488
Country
AU
Tail
VH-YZU
Type
PA44
No current signal · last broadcast 3d ago
Flights observed
113
Distinct callsigns
1
Country
AU
Last broadcast
3d ago

Last known position

Most recent position reported by Mode-S 7C7D18.

Country allocation

The ICAO 24-bit address 7C7D18 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
YZU - 113 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-10 YZU BUY → BUY Jul 10, 23:45 UTCJul 11, 00:45 UTC1h 0m
2026-07-10 YZU - Jul 10, 05:55 UTCJul 10, 06:35 UTC40m
2026-07-10 YZU - Jul 10, 04:15 UTCJul 10, 04:40 UTC25m
2026-07-10 YZU - Jul 10, 01:35 UTCJul 10, 02:50 UTC1h 15m
2026-07-09 YZU - Jul 9, 06:20 UTCJul 9, 07:15 UTC55m
2026-07-09 YZU BUY → BUY Jul 9, 04:45 UTCJul 9, 05:05 UTC20m
2026-07-08 YZU BUY → BUY Jul 8, 06:50 UTCJul 8, 07:35 UTC45m
2026-07-08 YZU BUY → BUY Jul 8, 05:30 UTCJul 8, 06:10 UTC40m
2026-07-08 YZU - Jul 8, 04:10 UTCJul 8, 04:50 UTC40m
2026-07-08 YZU - Jul 8, 01:50 UTCJul 8, 02:55 UTC1h 5m
2026-07-07 YZU - Jul 7, 06:05 UTCJul 7, 06:55 UTC50m
2026-07-07 YZU - Jul 7, 04:55 UTCJul 7, 05:30 UTC35m
2026-07-07 YZU - Jul 7, 02:40 UTCJul 7, 03:30 UTC50m
2026-07-06 YZU BUY → BUY Jul 6, 22:50 UTCJul 7, 00:45 UTC1h 55m
2026-07-06 YZU - Jul 6, 02:40 UTCJul 6, 03:35 UTC55m
2026-07-03 YZU BUY → BUY Jul 3, 05:20 UTCJul 3, 05:50 UTC30m
2026-07-03 YZU BUY → BUY Jul 3, 01:10 UTCJul 3, 04:00 UTC2h 50m
2026-07-02 YZU BUY → BUY Jul 2, 23:40 UTCJul 3, 00:25 UTC45m
2026-07-02 YZU - Jul 2, 05:20 UTCJul 2, 07:05 UTC1h 45m
2026-07-02 YZU BUY → BUY Jul 2, 00:30 UTCJul 2, 04:30 UTC4h 0m
2026-07-01 YZU - Jul 1, 07:15 UTCJul 1, 07:55 UTC40m
2026-07-01 YZU - Jul 1, 05:45 UTCJul 1, 06:40 UTC55m
2026-07-01 YZU - Jul 1, 04:20 UTCJul 1, 05:00 UTC40m
2026-07-01 YZU - Jul 1, 03:00 UTCJul 1, 03:40 UTC40m
2026-07-01 YZU BUY → BUY Jul 1, 00:40 UTCJul 1, 01:25 UTC45m
2026-06-29 YZU BUY → BUY Jun 29, 04:14 UTCJun 29, 05:09 UTC55m
2026-06-25 YZU - Jun 25, 07:19 UTCJun 25, 08:50 UTC1h 30m
2026-06-25 YZU - Jun 25, 05:39 UTCJun 25, 06:00 UTC20m
2026-06-24 YZU - Jun 24, 06:25 UTCJun 24, 07:10 UTC45m
2026-06-24 YZU - Jun 24, 04:15 UTCJun 24, 04:55 UTC40m
2026-06-23 YZU - Jun 23, 04:25 UTCJun 23, 05:04 UTC40m
2026-06-22 YZU - Jun 22, 22:34 UTCJun 23, 00:04 UTC1h 30m
2026-06-22 YZU - Jun 22, 07:19 UTCJun 22, 07:54 UTC35m
2026-06-22 YZU BUY → BUY Jun 22, 03:45 UTCJun 22, 04:49 UTC1h 5m
2026-06-19 YZU - Jun 19, 03:44 UTCJun 19, 05:00 UTC1h 15m
2026-06-19 YZU - Jun 19, 01:29 UTCJun 19, 02:04 UTC35m
2026-06-18 YZU - Jun 18, 22:40 UTCJun 19, 00:29 UTC1h 49m
2026-06-18 YZU - Jun 18, 02:35 UTCJun 18, 03:15 UTC40m
2026-06-17 YZU BUY → BUY Jun 17, 23:40 UTCJun 18, 00:45 UTC1h 5m
2026-06-17 YZU - Jun 17, 04:20 UTCJun 17, 05:05 UTC45m
2026-06-16 YZU BUY → BUY Jun 16, 04:50 UTCJun 16, 05:45 UTC55m
2026-06-16 YZU - Jun 16, 01:55 UTCJun 16, 03:05 UTC1h 10m
2026-06-15 YZU - Jun 15, 04:40 UTCJun 15, 06:20 UTC1h 40m
2026-06-13 YZU - Jun 13, 05:50 UTCJun 13, 06:55 UTC1h 5m
2026-06-13 YZU BUY → BUY Jun 13, 03:35 UTCJun 13, 04:20 UTC45m
2026-06-12 YZU - Jun 12, 07:05 UTCJun 12, 07:50 UTC45m
2026-06-12 YZU - Jun 12, 05:45 UTCJun 12, 06:30 UTC45m
2026-06-12 YZU - Jun 12, 03:05 UTCJun 12, 03:55 UTC50m
2026-06-12 YZU - Jun 12, 00:30 UTCJun 12, 01:30 UTC1h 0m
2026-06-10 YZU - Jun 10, 07:25 UTCJun 10, 09:10 UTC1h 45m

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

Mode-S 7C7D18 frequently asked

What is Mode-S code 7C7D18?
7C7D18 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-YZU.
Where is Mode-S 7C7D18 registered?
Mode-S code 7C7D18 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7D18 broadcasting right now?
No active broadcast right now. Last signal was 3d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C7D18, octal 37076430, decimal 8,158,488.
What flights does 7C7D18 operate?
Mode-S 7C7D18 has broadcast 1 distinct callsign, including YZU.