Apparatus

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sensors Mode-S transponder

7C7F54

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-ZFQ · CESSNA 172 Skyhawk · operated by SUNRAYSIA INVESTMENTS PTY LTD

Hex
7C7F54
Octal
37077524
Decimal
8,159,060
Country
AU
Tail
VH-ZFQ
Type
C172
Broadcasting now · callsign ZFQ · 2,325 ft
Flights observed
208
Distinct callsigns
1
Country
AU
Last broadcast
1h ago

Current position

7C7F54 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 7C7F54 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
ZFQ - 208 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 ZFQ - Jul 18, 00:45 UTCJul 18, 01:00 UTC15m
2026-07-17 ZFQ - Jul 17, 22:55 UTCJul 17, 23:14 UTC20m
2026-07-17 ZFQ - Jul 17, 05:25 UTCJul 17, 06:15 UTC50m
2026-07-17 ZFQ - Jul 17, 03:14 UTCJul 17, 04:35 UTC1h 20m
2026-07-17 ZFQ - Jul 17, 01:25 UTCJul 17, 02:20 UTC55m
2026-07-17 ZFQ - Jul 17, 00:04 UTCJul 17, 00:40 UTC35m
2026-07-16 ZFQ - Jul 16, 03:10 UTCJul 16, 03:40 UTC30m
2026-07-16 ZFQ - Jul 16, 00:15 UTCJul 16, 00:45 UTC30m
2026-07-15 ZFQ - Jul 15, 22:50 UTCJul 15, 23:40 UTC50m
2026-07-15 ZFQ - Jul 15, 03:00 UTCJul 15, 04:10 UTC1h 10m
2026-07-15 ZFQ - Jul 15, 01:55 UTCJul 15, 02:25 UTC30m
2026-07-14 ZFQ - Jul 14, 23:40 UTCJul 15, 00:10 UTC30m
2026-07-10 ZFQ - Jul 10, 05:35 UTCJul 10, 06:15 UTC40m
2026-07-10 ZFQ - Jul 10, 03:50 UTCJul 10, 04:30 UTC40m
2026-07-10 ZFQ - Jul 10, 00:55 UTCJul 10, 01:40 UTC45m
2026-07-09 ZFQ - Jul 9, 23:15 UTCJul 10, 00:05 UTC50m
2026-07-09 ZFQ - Jul 9, 04:30 UTCJul 9, 05:25 UTC55m
2026-07-09 ZFQ - Jul 9, 01:50 UTCJul 9, 03:30 UTC1h 40m
2026-07-09 ZFQ - Jul 9, 00:20 UTCJul 9, 00:55 UTC35m
2026-07-08 ZFQ - Jul 8, 05:45 UTCJul 8, 06:25 UTC40m
2026-07-08 ZFQ - Jul 8, 04:15 UTCJul 8, 04:45 UTC30m
2026-07-08 ZFQ - Jul 8, 02:40 UTCJul 8, 03:05 UTC25m
2026-07-07 ZFQ - Jul 7, 04:50 UTCJul 7, 05:40 UTC50m
2026-07-07 ZFQ - Jul 7, 03:05 UTCJul 7, 03:50 UTC45m
2026-07-06 ZFQ - Jul 6, 05:00 UTCJul 6, 05:40 UTC40m
2026-07-06 ZFQ - Jul 6, 02:30 UTCJul 6, 03:35 UTC1h 5m
2026-07-06 ZFQ - Jul 6, 00:40 UTCJul 6, 01:05 UTC25m
2026-07-05 ZFQ - Jul 5, 23:05 UTCJul 6, 00:15 UTC1h 10m
2026-07-04 ZFQ - Jul 4, 04:30 UTCJul 4, 04:45 UTC15m
2026-07-04 ZFQ - Jul 4, 03:00 UTCJul 4, 03:45 UTC45m
2026-07-04 ZFQ - Jul 4, 00:50 UTCJul 4, 01:05 UTC15m
2026-07-03 ZFQ - Jul 3, 22:45 UTCJul 3, 23:30 UTC45m
2026-07-01 ZFQ - Jul 1, 00:55 UTCJul 1, 01:20 UTC25m
2026-06-29 ZFQ - Jun 29, 03:39 UTCJun 29, 04:39 UTC1h 0m
2026-06-29 ZFQ - Jun 29, 01:20 UTCJun 29, 01:55 UTC35m
2026-06-29 ZFQ - Jun 29, 00:00 UTCJun 29, 00:29 UTC30m
2026-06-28 ZFQ - Jun 28, 21:55 UTCJun 28, 22:45 UTC50m
2026-06-27 ZFQ - Jun 27, 05:19 UTCJun 27, 05:49 UTC30m
2026-06-27 ZFQ - Jun 27, 03:04 UTCJun 27, 03:25 UTC20m
2026-06-26 ZFQ - Jun 26, 06:09 UTCJun 26, 06:45 UTC35m
2026-06-26 ZFQ - Jun 26, 04:14 UTCJun 26, 04:39 UTC25m
2026-06-25 ZFQ - Jun 25, 04:54 UTCJun 25, 05:29 UTC35m
2026-06-25 ZFQ - Jun 25, 03:50 UTCJun 25, 04:20 UTC30m
2026-06-24 ZFQ - Jun 24, 04:50 UTCJun 24, 05:24 UTC35m
2026-06-24 ZFQ - Jun 24, 03:19 UTCJun 24, 03:44 UTC25m
2026-06-24 ZFQ - Jun 24, 00:20 UTCJun 24, 00:40 UTC20m
2026-06-23 ZFQ - Jun 23, 22:49 UTCJun 23, 23:24 UTC35m
2026-06-23 ZFQ - Jun 23, 08:04 UTCJun 23, 09:45 UTC1h 40m
2026-06-23 ZFQ - Jun 23, 05:29 UTCJun 23, 06:34 UTC1h 5m
2026-06-23 ZFQ - Jun 23, 03:15 UTCJun 23, 03:54 UTC40m

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

Mode-S 7C7F54 frequently asked

What is Mode-S code 7C7F54?
7C7F54 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-ZFQ.
Where is Mode-S 7C7F54 registered?
Mode-S code 7C7F54 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7F54 broadcasting right now?
Yes. Mode-S 7C7F54 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C7F54, octal 37077524, decimal 8,159,060.
What flights does 7C7F54 operate?
Mode-S 7C7F54 has broadcast 1 distinct callsign, including ZFQ.