Apparatus

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sensors Mode-S transponder

7C7F25

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C7F25
Octal
37077445
Decimal
8,159,013
Country
AU
Tail
VH-ZEF
Type
C172
No current signal · last broadcast 42m ago
Flights observed
67
Distinct callsigns
1
Country
AU
Last broadcast
42m ago

Last known position

Most recent position reported by Mode-S 7C7F25.

Country allocation

The ICAO 24-bit address 7C7F25 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
ZEF - 67 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-03 ZEF JAD → JAD Jun 3, 01:10 UTCJun 3, 03:15 UTC2h 5m
2026-06-02 ZEF JAD → JAD Jun 2, 03:10 UTCJun 2, 03:55 UTC45m
2026-06-02 ZEF JAD → JAD Jun 2, 01:00 UTCJun 2, 01:40 UTC40m
2026-05-27 ZEF - May 27, 06:55 UTCMay 27, 07:55 UTC1h 0m
2026-05-27 ZEF - May 27, 05:29 UTCMay 27, 05:45 UTC15m
2026-05-27 ZEF JAD → JAD May 27, 02:39 UTCMay 27, 03:24 UTC45m
2026-05-27 ZEF - May 27, 00:49 UTCMay 27, 01:34 UTC45m
2026-05-26 ZEF - May 26, 02:15 UTCMay 26, 03:30 UTC1h 15m
2026-05-26 ZEF JAD → JAD May 26, 00:04 UTCMay 26, 00:54 UTC50m
2026-05-25 ZEF JAD → JAD May 25, 07:55 UTCMay 25, 09:10 UTC1h 15m
2026-05-25 ZEF JAD → JAD May 25, 06:05 UTCMay 25, 06:55 UTC50m
2026-05-25 ZEF JAD → JAD May 25, 03:05 UTCMay 25, 04:15 UTC1h 10m
2026-05-24 ZEF - May 24, 06:15 UTCMay 24, 06:35 UTC20m
2026-05-24 ZEF - May 24, 01:35 UTCMay 24, 02:10 UTC35m
2026-05-23 ZEF - May 23, 07:00 UTCMay 23, 07:15 UTC15m
2026-05-23 ZEF JAD → RTS May 23, 02:30 UTCMay 23, 03:00 UTC30m
2026-05-22 ZEF - May 22, 07:25 UTCMay 22, 08:15 UTC50m
2026-05-22 ZEF JAD → JAD May 22, 06:25 UTCMay 22, 07:20 UTC55m
2026-05-22 ZEF - May 22, 05:00 UTCMay 22, 06:15 UTC1h 15m
2026-05-22 ZEF - May 22, 03:45 UTCMay 22, 04:50 UTC1h 5m
2026-05-22 ZEF JAD → JAD May 22, 01:40 UTCMay 22, 02:30 UTC50m
2026-05-22 ZEF JAD → JAD May 22, 00:35 UTCMay 22, 01:35 UTC1h 0m
2026-05-20 ZEF - May 20, 06:05 UTCMay 20, 06:45 UTC40m
2026-05-20 ZEF JAD → JAD May 20, 04:35 UTCMay 20, 05:15 UTC41m
2026-05-19 ZEF - May 19, 07:20 UTCMay 19, 08:00 UTC40m
2026-05-19 ZEF - May 19, 05:25 UTCMay 19, 05:45 UTC20m
2026-05-19 ZEF - May 19, 03:10 UTCMay 19, 03:50 UTC40m
2026-05-19 ZEF - May 19, 01:05 UTCMay 19, 01:45 UTC40m
2026-05-12 ZEF - May 12, 11:15 UTCMay 12, 12:10 UTC55m
2026-05-12 ZEF JAD → JAD May 12, 10:50 UTCMay 12, 11:10 UTC20m
2026-05-12 ZEF JAD → JAD May 12, 07:50 UTCMay 12, 08:50 UTC1h 0m
2026-05-11 ZEF JAD → JAD May 11, 10:20 UTCMay 11, 12:40 UTC2h 20m
2026-05-08 ZEF JAD → JAD May 8, 04:14 UTCMay 8, 05:14 UTC1h 0m
2026-05-08 ZEF JAD → JAD May 8, 00:40 UTCMay 8, 02:59 UTC2h 20m
2026-05-07 ZEF JAD → JAD May 7, 07:30 UTCMay 7, 08:00 UTC30m
2026-05-07 ZEF JAD → JAD May 7, 05:20 UTCMay 7, 06:45 UTC1h 25m
2026-05-07 ZEF - May 7, 03:10 UTCMay 7, 03:35 UTC25m
2026-05-07 ZEF - May 7, 00:35 UTCMay 7, 01:30 UTC55m
2026-05-06 ZEF JAD → JAD May 6, 03:30 UTCMay 6, 04:55 UTC1h 25m
2026-05-06 ZEF JAD → JAD May 6, 00:50 UTCMay 6, 02:05 UTC1h 15m
2026-05-05 ZEF JAD → JAD May 5, 07:10 UTCMay 5, 08:30 UTC1h 20m
2026-05-05 ZEF JAD → JAD May 5, 05:20 UTCMay 5, 06:20 UTC1h 0m
2026-05-04 ZEF - May 4, 09:00 UTCMay 4, 09:45 UTC45m
2026-05-04 ZEF JAD → JAD May 4, 07:30 UTCMay 4, 08:10 UTC40m
2026-05-04 ZEF JAD → JAD May 4, 03:35 UTCMay 4, 04:50 UTC1h 15m
2026-05-04 ZEF JAD → JAD May 4, 01:20 UTCMay 4, 02:15 UTC55m
2026-05-02 ZEF JAD → JAD May 2, 07:00 UTCMay 2, 07:35 UTC35m
2026-05-02 ZEF - May 2, 06:10 UTCMay 2, 06:55 UTC45m
2026-05-02 ZEF JAD → JAD May 2, 05:05 UTCMay 2, 06:05 UTC1h 0m
2026-05-02 ZEF - May 2, 03:00 UTCMay 2, 03:35 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-ZEF page for operator, model, and routing details .

Mode-S 7C7F25 frequently asked

What is Mode-S code 7C7F25?
7C7F25 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-ZEF.
Where is Mode-S 7C7F25 registered?
Mode-S code 7C7F25 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7F25 broadcasting right now?
No active broadcast right now. Last signal was 42m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C7F25, octal 37077445, decimal 8,159,013.
What flights does 7C7F25 operate?
Mode-S 7C7F25 has broadcast 1 distinct callsign, including ZEF.