Apparatus

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sensors Mode-S transponder

7C7539

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-XFV · DE HAVILLAND DHC-8-300 Dash 8 · operated by SKIPPERS AVIATION PTY LTD

Hex
7C7539
Octal
37072471
Decimal
8,156,473
Country
AU
Tail
VH-XFV
Type
DH8C
No current signal · last broadcast 1d ago
Flights observed
140
Distinct callsigns
18
Country
AU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 7C7539.

Country allocation

The ICAO 24-bit address 7C7539 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 18 distinct

Callsign Airline Flights Last seen
PY4322 - 20 2026-07-16
PY4321 - 18 2026-07-15
PY4324 - 12 2026-07-07
PY4323 - 11 2026-07-07
PY4001 - 11 2026-07-14
PY4003 - 10 2026-07-15
PY4002 - 10 2026-07-15
PY4004 - 9 2026-07-15
PY3032 - 8 2026-07-03
PY3031 - 8 2026-07-02
PY5511 - 5 2026-04-15
PY6004 - 3 2026-07-02
PY5509 - 3 2026-04-22
PY3034 - 3 2026-06-26
PY3033 - 3 2026-06-26
PY1069 - 3 2026-05-14
PY6003 - 2 2026-07-02
PY5512 - 1 2026-04-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-16 PY4322 - Jul 16, 04:20 UTCJul 16, 05:20 UTC1h 0m
2026-07-15 PY4321 - Jul 15, 23:45 UTCJul 16, 00:15 UTC30m
2026-07-15 PY4004 - Jul 15, 07:50 UTCJul 15, 08:30 UTC40m
2026-07-15 PY4003 - Jul 15, 05:10 UTCJul 15, 05:45 UTC35m
2026-07-15 PY4002 - Jul 15, 02:05 UTCJul 15, 02:45 UTC40m
2026-07-14 PY4001 - Jul 14, 23:05 UTCJul 14, 23:45 UTC40m
2026-07-09 PY4322 - Jul 9, 02:30 UTCJul 9, 03:15 UTC45m
2026-07-09 PY4321 - Jul 9, 00:00 UTCJul 9, 00:30 UTC30m
2026-07-08 PY4004 - Jul 8, 07:45 UTCJul 8, 08:20 UTC35m
2026-07-08 PY4003 - Jul 8, 05:10 UTCJul 8, 05:40 UTC30m
2026-07-08 PY4002 - Jul 8, 01:45 UTCJul 8, 02:15 UTC30m
2026-07-07 PY4001 - Jul 7, 23:00 UTCJul 7, 23:30 UTC30m
2026-07-07 PY4324 - Jul 7, 08:50 UTCJul 7, 09:25 UTC35m
2026-07-07 PY4323 - Jul 7, 06:15 UTCJul 7, 06:50 UTC35m
2026-07-07 PY4322 - Jul 7, 02:20 UTCJul 7, 03:00 UTC40m
2026-07-06 PY4321 - Jul 6, 23:45 UTCJul 7, 00:20 UTC35m
2026-07-03 PY3032 - Jul 3, 01:15 UTCJul 3, 01:55 UTC40m
2026-07-02 PY3031 - Jul 2, 22:55 UTCJul 2, 23:30 UTC35m
2026-07-02 PY6004 - Jul 2, 07:40 UTCJul 2, 08:55 UTC1h 15m
2026-07-02 PY6003 - Jul 2, 05:50 UTCJul 2, 07:00 UTC1h 10m
2026-07-02 PY4322 - Jul 2, 03:35 UTCJul 2, 04:15 UTC40m
2026-07-01 PY4321 - Jul 1, 23:50 UTCJul 2, 00:25 UTC35m
2026-07-01 PY4004 KGI → PER Jul 1, 07:20 UTCJul 1, 08:45 UTC1h 25m
2026-07-01 PY4003 PER → KGI Jul 1, 05:30 UTCJul 1, 07:10 UTC1h 40m
2026-07-01 PY4002 KGI → PER Jul 1, 02:55 UTCJul 1, 04:35 UTC1h 40m
2026-07-01 PY4002 - Jul 1, 01:50 UTCJul 1, 02:00 UTC10m
2026-06-30 PY4001 - Jun 30, 23:20 UTCJun 30, 23:45 UTC25m
2026-06-30 PY4324 - Jun 30, 09:10 UTCJun 30, 09:45 UTC35m
2026-06-30 PY4323 - Jun 30, 06:20 UTCJun 30, 06:55 UTC35m
2026-06-30 PY4322 - Jun 30, 02:30 UTCJun 30, 03:25 UTC55m
2026-06-29 PY4321 - Jun 29, 23:44 UTCJun 30, 00:20 UTC35m
2026-06-26 PY3034 - Jun 26, 08:40 UTCJun 26, 09:30 UTC50m
2026-06-26 PY3033 - Jun 26, 06:25 UTCJun 26, 07:05 UTC40m
2026-06-26 PY3032 - Jun 26, 01:10 UTCJun 26, 02:00 UTC50m
2026-06-25 PY3031 - Jun 25, 22:59 UTCJun 25, 23:44 UTC45m
2026-06-25 PY4322 - Jun 25, 03:44 UTCJun 25, 04:35 UTC50m
2026-06-24 PY4321 - Jun 24, 23:59 UTCJun 25, 00:35 UTC35m
2026-06-24 PY4004 - Jun 24, 07:59 UTCJun 24, 08:30 UTC30m
2026-06-24 PY4003 - Jun 24, 05:09 UTCJun 24, 05:44 UTC35m
2026-06-24 PY4001 - Jun 24, 02:54 UTCJun 24, 03:29 UTC35m
2026-06-24 PY4001 - Jun 24, 00:44 UTCJun 24, 01:24 UTC40m
2026-06-23 PY4324 - Jun 23, 09:05 UTCJun 23, 09:34 UTC30m
2026-06-23 PY4323 - Jun 23, 06:04 UTCJun 23, 06:39 UTC35m
2026-06-23 PY4322 - Jun 23, 02:40 UTCJun 23, 03:45 UTC1h 5m
2026-06-23 PY4321 - Jun 23, 00:19 UTCJun 23, 00:54 UTC35m
2026-06-19 PY3034 - Jun 19, 10:14 UTCJun 19, 10:54 UTC40m
2026-06-19 PY3033 - Jun 19, 08:24 UTCJun 19, 08:59 UTC35m
2026-06-18 PY4322 - Jun 18, 03:00 UTCJun 18, 03:40 UTC40m
2026-06-18 PY4321 - Jun 18, 00:00 UTCJun 18, 00:40 UTC40m
2026-06-17 PY4004 - Jun 17, 08:25 UTCJun 17, 09:00 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-XFV page for operator, model, and routing details .

Mode-S 7C7539 frequently asked

What is Mode-S code 7C7539?
7C7539 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-XFV.
Where is Mode-S 7C7539 registered?
Mode-S code 7C7539 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C7539 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C7539, octal 37072471, decimal 8,156,473.
What flights does 7C7539 operate?
Mode-S 7C7539 has broadcast 18 distinct callsigns, including PY4322, PY4321, PY4324, PY4323, PY4001.