Apparatus

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sensors Mode-S transponder

7C7B80

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C7B80
Octal
37075600
Decimal
8,158,080
Country
AU
Tail
VH-YOI
Type
C172
No current signal · last broadcast 8h ago
Flights observed
205
Distinct callsigns
2
Country
AU
Last broadcast
8h ago

Last known position

Most recent position reported by Mode-S 7C7B80.

Country allocation

The ICAO 24-bit address 7C7B80 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
YOI - 204 2026-07-14
YNM - 1 2026-04-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 YOI JAD → JAD Jul 14, 09:05 UTCJul 14, 09:35 UTC30m
2026-07-14 YOI JAD → JAD Jul 14, 06:20 UTCJul 14, 07:05 UTC45m
2026-07-14 YOI JAD → JAD Jul 14, 04:40 UTCJul 14, 05:15 UTC35m
2026-07-14 YOI - Jul 14, 02:15 UTCJul 14, 03:35 UTC1h 20m
2026-07-14 YOI - Jul 14, 00:45 UTCJul 14, 01:20 UTC35m
2026-07-13 YOI JAD → JAD Jul 13, 08:35 UTCJul 13, 09:25 UTC50m
2026-07-13 YOI - Jul 13, 06:01 UTCJul 13, 06:55 UTC55m
2026-07-13 YOI - Jul 13, 04:50 UTCJul 13, 05:25 UTC35m
2026-07-13 YOI JAD → JAD Jul 13, 02:50 UTCJul 13, 03:25 UTC35m
2026-07-12 YOI JAD → JAD Jul 12, 07:40 UTCJul 12, 08:55 UTC1h 15m
2026-07-12 YOI JAD → JAD Jul 12, 05:55 UTCJul 12, 06:45 UTC50m
2026-07-12 YOI JAD → JAD Jul 12, 03:25 UTCJul 12, 04:01 UTC35m
2026-07-12 YOI JAD → JAD Jul 12, 00:55 UTCJul 12, 02:01 UTC1h 5m
2026-07-11 YOI JAD → JAD Jul 11, 11:45 UTCJul 11, 12:30 UTC45m
2026-07-11 YOI JAD → JAD Jul 11, 07:20 UTCJul 11, 09:25 UTC2h 5m
2026-07-11 YOI JAD → JAD Jul 11, 05:25 UTCJul 11, 06:01 UTC35m
2026-07-11 YOI JAD → JAD Jul 11, 03:25 UTCJul 11, 04:05 UTC40m
2026-07-11 YOI JAD → JAD Jul 11, 01:05 UTCJul 11, 02:05 UTC1h 0m
2026-07-10 YOI JAD → JAD Jul 10, 09:50 UTCJul 10, 12:05 UTC2h 15m
2026-07-10 YOI JAD → JAD Jul 10, 06:25 UTCJul 10, 08:05 UTC1h 40m
2026-07-08 YOI JAD → JAD Jul 8, 13:05 UTCJul 8, 13:50 UTC45m
2026-07-08 YOI JAD → JAD Jul 8, 12:15 UTCJul 8, 12:35 UTC20m
2026-07-08 YOI JAD → JAD Jul 8, 11:15 UTCJul 8, 11:55 UTC40m
2026-07-03 YOI JAD → JAD Jul 3, 07:55 UTCJul 3, 09:05 UTC1h 10m
2026-07-03 YOI JAD → JAD Jul 3, 05:55 UTCJul 3, 06:30 UTC35m
2026-07-03 YOI JAD → JAD Jul 3, 03:50 UTCJul 3, 04:30 UTC40m
2026-07-03 YOI - Jul 3, 02:05 UTCJul 3, 02:30 UTC25m
2026-07-02 YOI - Jul 2, 23:50 UTCJul 3, 01:35 UTC1h 45m
2026-07-02 YOI JAD → JAD Jul 2, 07:55 UTCJul 2, 09:00 UTC1h 5m
2026-07-02 YOI JAD → JAD Jul 2, 04:20 UTCJul 2, 06:35 UTC2h 15m
2026-07-02 YOI JAD → JAD Jul 2, 00:05 UTCJul 2, 02:25 UTC2h 20m
2026-07-01 YOI JAD → JAD Jul 1, 03:55 UTCJul 1, 06:15 UTC2h 20m
2026-07-01 YOI - Jul 1, 01:35 UTCJul 1, 02:25 UTC50m
2026-07-01 YOI - Jul 1, 00:05 UTCJul 1, 00:45 UTC40m
2026-06-30 YOI JAD → JAD Jun 30, 06:30 UTCJun 30, 08:00 UTC1h 30m
2026-06-30 YOI JAD → JAD Jun 30, 04:30 UTCJun 30, 04:55 UTC25m
2026-06-28 YOI JAD → JAD Jun 28, 06:05 UTCJun 28, 06:34 UTC30m
2026-06-27 YOI JAD → JAD Jun 27, 08:05 UTCJun 27, 08:44 UTC40m
2026-06-27 YOI JAD → JAD Jun 27, 02:25 UTCJun 27, 02:59 UTC35m
2026-06-26 YOI JAD → JAD Jun 26, 04:10 UTCJun 26, 04:34 UTC25m
2026-06-25 YOI JAD → JAD Jun 25, 09:50 UTCJun 25, 12:30 UTC2h 40m
2026-06-25 YOI JAD → JAD Jun 25, 06:50 UTCJun 25, 08:40 UTC1h 50m
2026-06-25 YOI JAD → JAD Jun 25, 02:39 UTCJun 25, 03:15 UTC35m
2026-06-25 YOI JAD → JAD Jun 25, 00:14 UTCJun 25, 00:59 UTC45m
2026-06-24 YOI JAD → JAD Jun 24, 11:24 UTCJun 24, 13:24 UTC2h 0m
2026-06-24 YOI JAD → JAD Jun 24, 07:44 UTCJun 24, 08:49 UTC1h 5m
2026-06-24 YOI JAD → JAD Jun 24, 02:00 UTCJun 24, 02:40 UTC40m
2026-06-23 YOI JAD → JAD Jun 23, 23:55 UTCJun 24, 00:30 UTC35m
2026-06-23 YOI JAD → JAD Jun 23, 11:04 UTCJun 23, 11:54 UTC50m
2026-06-23 YOI JAD → JAD Jun 23, 08:59 UTCJun 23, 09:20 UTC20m

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

Mode-S 7C7B80 frequently asked

What is Mode-S code 7C7B80?
7C7B80 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-YOI.
Where is Mode-S 7C7B80 registered?
Mode-S code 7C7B80 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7B80 broadcasting right now?
No active broadcast right now. Last signal was 8h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C7B80, octal 37075600, decimal 8,158,080.
What flights does 7C7B80 operate?
Mode-S 7C7B80 has broadcast 2 distinct callsigns, including YOI, YNM.