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sensors Mode-S transponder

7C7A71

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-YGZ · CESSNA 172 Skyhawk · operated by SINGAPORE FLYING COLLEGE PTE LTD

Hex
7C7A71
Octal
37075161
Decimal
8,157,809
Country
AU
Tail
VH-YGZ
Type
C172
Broadcasting now · callsign YGZ · 3,100 ft
Flights observed
191
Distinct callsigns
1
Country
AU
Last broadcast
2h ago

Current position

7C7A71 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 7C7A71 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
YGZ - 191 2026-07-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 YGZ - Jul 14, 00:20 UTCJul 14, 00:35 UTC15m
2026-07-13 YGZ JAD → JAD Jul 13, 23:40 UTCJul 14, 00:10 UTC30m
2026-07-13 YGZ JAD → JAD Jul 13, 11:25 UTCJul 13, 12:15 UTC50m
2026-07-13 YGZ JAD → JAD Jul 13, 07:05 UTCJul 13, 08:35 UTC1h 30m
2026-07-13 YGZ JAD → JAD Jul 13, 02:40 UTCJul 13, 04:55 UTC2h 15m
2026-07-12 YGZ JAD → JAD Jul 12, 06:45 UTCJul 12, 09:05 UTC2h 20m
2026-07-12 YGZ JAD → JAD Jul 12, 03:20 UTCJul 12, 05:01 UTC1h 40m
2026-07-12 YGZ JAD → JAD Jul 12, 00:55 UTCJul 12, 01:30 UTC35m
2026-07-11 YGZ JAD → JAD Jul 11, 08:10 UTCJul 11, 08:45 UTC35m
2026-07-11 YGZ JAD → JAD Jul 11, 04:50 UTCJul 11, 05:25 UTC35m
2026-07-11 YGZ JAD → JAD Jul 11, 00:35 UTCJul 11, 03:15 UTC2h 40m
2026-07-10 YGZ JAD → JAD Jul 10, 10:35 UTCJul 10, 11:20 UTC45m
2026-07-10 YGZ JAD → JAD Jul 10, 08:20 UTCJul 10, 09:35 UTC1h 15m
2026-07-10 YGZ JAD → JAD Jul 10, 05:50 UTCJul 10, 06:55 UTC1h 5m
2026-07-09 YGZ - Jul 9, 11:50 UTCJul 9, 12:10 UTC20m
2026-07-09 YGZ JAD → JAD Jul 9, 10:40 UTCJul 9, 11:30 UTC50m
2026-07-09 YGZ JAD → JAD Jul 9, 08:25 UTCJul 9, 09:30 UTC1h 5m
2026-07-09 YGZ JAD → JAD Jul 9, 05:40 UTCJul 9, 07:00 UTC1h 20m
2026-07-09 YGZ JAD → JAD Jul 9, 02:30 UTCJul 9, 04:10 UTC1h 40m
2026-07-08 YGZ JAD → JAD Jul 8, 23:50 UTCJul 9, 00:55 UTC1h 5m
2026-07-08 YGZ JAD → JAD Jul 8, 08:25 UTCJul 8, 09:20 UTC55m
2026-07-08 YGZ JAD → JAD Jul 8, 05:10 UTCJul 8, 06:00 UTC50m
2026-07-08 YGZ JAD → JAD Jul 8, 02:15 UTCJul 8, 02:50 UTC35m
2026-07-08 YGZ JAD → JAD Jul 8, 00:20 UTCJul 8, 01:00 UTC40m
2026-07-07 YGZ JAD → JAD Jul 7, 10:40 UTCJul 7, 12:45 UTC2h 5m
2026-07-07 YGZ - Jul 7, 08:15 UTCJul 7, 08:50 UTC35m
2026-07-07 YGZ - Jul 7, 06:25 UTCJul 7, 07:15 UTC50m
2026-07-07 YGZ JAD → JAD Jul 7, 03:50 UTCJul 7, 04:20 UTC30m
2026-07-07 YGZ JAD → JAD Jul 7, 01:20 UTCJul 7, 02:05 UTC45m
2026-07-06 YGZ JAD → JAD Jul 6, 08:40 UTCJul 6, 09:20 UTC40m
2026-07-06 YGZ JAD → JAD Jul 6, 06:00 UTCJul 6, 06:40 UTC40m
2026-07-06 YGZ JAD → JAD Jul 6, 04:00 UTCJul 6, 04:35 UTC35m
2026-07-06 YGZ JAD → JAD Jul 6, 01:20 UTCJul 6, 02:10 UTC50m
2026-07-03 YGZ JAD → JAD Jul 3, 04:15 UTCJul 3, 06:50 UTC2h 35m
2026-07-02 YGZ JAD → JAD Jul 2, 10:35 UTCJul 2, 12:40 UTC2h 5m
2026-07-02 YGZ JAD → JAD Jul 2, 07:55 UTCJul 2, 08:55 UTC1h 0m
2026-07-02 YGZ JAD → JAD Jul 2, 04:40 UTCJul 2, 05:40 UTC1h 0m
2026-07-02 YGZ JAD → JAD Jul 2, 02:05 UTCJul 2, 03:05 UTC1h 0m
2026-07-02 YGZ JAD → JAD Jul 2, 00:05 UTCJul 2, 00:40 UTC35m
2026-07-01 YGZ JAD → JAD Jul 1, 06:50 UTCJul 1, 08:15 UTC1h 25m
2026-07-01 YGZ JAD → JAD Jul 1, 05:20 UTCJul 1, 06:00 UTC40m
2026-07-01 YGZ JAD → JAD Jul 1, 01:55 UTCJul 1, 02:30 UTC35m
2026-06-30 YGZ - Jun 30, 08:55 UTCJun 30, 09:40 UTC45m
2026-06-30 YGZ - Jun 30, 07:15 UTCJun 30, 07:55 UTC40m
2026-06-29 YGZ JAD → JAD Jun 29, 02:45 UTCJun 29, 05:09 UTC2h 25m
2026-06-27 YGZ JAD → JAD Jun 27, 06:59 UTCJun 27, 07:15 UTC15m
2026-06-27 YGZ JAD → JAD Jun 27, 03:20 UTCJun 27, 03:30 UTC10m
2026-06-26 YGZ JAD → JAD Jun 26, 04:10 UTCJun 26, 04:45 UTC35m
2026-06-25 YGZ JAD → JAD Jun 25, 10:59 UTCJun 25, 11:44 UTC45m
2026-06-25 YGZ JAD → JAD Jun 25, 08:04 UTCJun 25, 09:50 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-YGZ page for operator, model, and routing details .

Mode-S 7C7A71 frequently asked

What is Mode-S code 7C7A71?
7C7A71 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-YGZ.
Where is Mode-S 7C7A71 registered?
Mode-S code 7C7A71 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7A71 broadcasting right now?
Yes. Mode-S 7C7A71 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C7A71, octal 37075161, decimal 8,157,809.
What flights does 7C7A71 operate?
Mode-S 7C7A71 has broadcast 1 distinct callsign, including YGZ.