Apparatus

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sensors Mode-S transponder

7CF839

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to A97-466 · LOCKHEED C-130 Hercules

Hex
7CF839
Octal
37174071
Decimal
8,190,009
Country
AU
Tail
A97-466
Type
C130
No current signal · last broadcast 15d ago
Flights observed
80
Distinct callsigns
20
Country
AU
Last broadcast
15d ago

Last known position

Most recent position reported by Mode-S 7CF839.

Country allocation

The ICAO 24-bit address 7CF839 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 20 distinct

Callsign Airline Flights Last seen
ASY576 - 7 2026-05-12
TROJ63 - 6 2026-06-16
TROJ10 - 6 2026-06-13
TROJ02 - 6 2026-06-29
TROJ64 - 4 2026-06-17
TROJ47 - 4 2026-06-11
TROJ46 - 4 2026-06-10
ASY572 - 4 2026-05-26
ASY569 - 4 2026-05-07
ASY584 - 3 2026-05-20
TROJ76 - 2 2026-04-28
TROJ65 - 2 2026-06-18
TROJ62 - 2 2026-06-15
TROJ60 - 2 2026-06-23
TROJ51 - 2 2026-06-12
TROJ50 - 2 2026-06-23
TROJ35 - 2 2026-07-01
TROJ33 - 2 2026-05-05
TROJ32 - 2 2026-05-05
TROJ31 - 2 2026-04-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-02 TROJ36 - Jul 2, 22:55 UTCJul 3, 01:35 UTC2h 40m
2026-07-01 TROJ35 - Jul 1, 09:00 UTCJul 1, 09:55 UTC55m
2026-07-01 TROJ35 - Jul 1, 05:35 UTCJul 1, 05:50 UTC15m
2026-06-30 TROJ14 - Jun 30, 10:10 UTCJun 30, 10:40 UTC30m
2026-06-30 TROJ14 - Jun 30, 05:15 UTCJun 30, 06:25 UTC1h 10m
2026-06-29 TROJ02 - Jun 29, 07:30 UTCJun 29, 09:54 UTC2h 25m
2026-06-29 TROJ02 - Jun 29, 05:59 UTCJun 29, 06:14 UTC15m
2026-06-26 TROJ22 - Jun 26, 00:59 UTCJun 26, 01:29 UTC30m
2026-06-25 TROJ06 - Jun 25, 01:44 UTCJun 25, 01:59 UTC15m
2026-06-24 TROJ06 - Jun 24, 22:39 UTCJun 25, 00:24 UTC1h 45m
2026-06-23 TROJ50 - Jun 23, 10:04 UTCJun 23, 10:35 UTC30m
2026-06-23 TROJ50 - Jun 23, 06:15 UTCJun 23, 06:44 UTC30m
2026-06-23 TROJ60 - Jun 23, 00:19 UTCJun 23, 01:50 UTC1h 30m
2026-06-22 TROJ60 - Jun 22, 23:20 UTCJun 22, 23:45 UTC25m
2026-06-22 TROJ70 XRH → XRH Jun 22, 03:05 UTCJun 22, 03:54 UTC50m
2026-06-18 TROJ65 - Jun 18, 09:45 UTCJun 18, 11:20 UTC1h 35m
2026-06-18 TROJ65 - Jun 18, 04:55 UTCJun 18, 05:35 UTC40m
2026-06-17 TROJ64 - Jun 17, 09:10 UTCJun 17, 09:40 UTC30m
2026-06-17 TROJ64 - Jun 17, 05:35 UTCJun 17, 06:10 UTC35m
2026-06-16 TROJ63 XRH → XRH Jun 16, 05:15 UTCJun 16, 06:04 UTC50m
2026-06-15 TROJ62 - Jun 15, 09:30 UTCJun 15, 10:05 UTC35m
2026-06-15 TROJ62 - Jun 15, 05:45 UTCJun 15, 06:15 UTC30m
2026-06-13 TROJ10 - Jun 13, 12:50 UTCJun 13, 13:20 UTC30m
2026-06-13 TROJ10 - Jun 13, 10:55 UTCJun 13, 11:35 UTC40m
2026-06-13 TROJ10 - Jun 13, 09:25 UTCJun 13, 09:50 UTC25m
2026-06-13 TROJ10 - Jun 13, 07:00 UTCJun 13, 08:30 UTC1h 30m
2026-06-12 TROJ10 - Jun 12, 09:40 UTCJun 12, 10:10 UTC30m
2026-06-12 TROJ10 - Jun 12, 05:15 UTCJun 12, 05:50 UTC35m
2026-06-12 TROJ51 - Jun 12, 02:00 UTCJun 12, 03:20 UTC1h 20m
2026-06-12 TROJ51 - Jun 12, 00:10 UTCJun 12, 00:50 UTC41m
2026-06-11 TROJ47 - Jun 11, 02:55 UTCJun 11, 03:40 UTC45m
2026-06-10 TROJ47 - Jun 10, 23:20 UTCJun 10, 23:50 UTC30m
2026-06-10 TROJ46 - Jun 10, 11:15 UTCJun 10, 11:55 UTC40m
2026-06-10 TROJ46 - Jun 10, 08:55 UTCJun 10, 09:25 UTC30m
2026-06-10 TROJ46 - Jun 10, 07:20 UTCJun 10, 08:00 UTC40m
2026-06-10 TROJ46 XRH → XRH Jun 10, 05:05 UTCJun 10, 06:15 UTC1h 10m
2026-06-10 TROJ43 - Jun 10, 00:05 UTCJun 10, 02:00 UTC1h 55m
2026-05-30 ASY590 - May 30, 01:20 UTCMay 30, 03:10 UTC1h 50m
2026-05-29 ASY590 - May 29, 23:20 UTCMay 30, 00:40 UTC1h 20m
2026-05-28 TROJ02 NAA → XRH May 28, 02:00 UTCMay 28, 03:35 UTC1h 35m
2026-05-28 TROJ02 - May 28, 00:40 UTCMay 28, 01:10 UTC30m
2026-05-27 TROJ64 - May 27, 08:55 UTCMay 27, 09:25 UTC30m
2026-05-27 TROJ64 - May 27, 05:55 UTCMay 27, 06:29 UTC35m
2026-05-27 TROJ02 - May 27, 02:29 UTCMay 27, 03:54 UTC1h 25m
2026-05-27 TROJ02 - May 27, 00:59 UTCMay 27, 01:29 UTC30m
2026-05-26 ASY572 - May 26, 06:29 UTCMay 26, 07:40 UTC1h 10m
2026-05-26 ASY572 - May 26, 04:00 UTCMay 26, 04:50 UTC50m
2026-05-23 ASY572 - May 23, 03:45 UTCMay 23, 04:35 UTC50m
2026-05-21 ASY572 - May 21, 22:25 UTCMay 21, 23:20 UTC55m
2026-05-20 ASY584 - May 20, 09:10 UTCMay 20, 10:25 UTC1h 15m

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 A97-466 page for operator, model, and routing details .

Mode-S 7CF839 frequently asked

What is Mode-S code 7CF839?
7CF839 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to A97-466.
Where is Mode-S 7CF839 registered?
Mode-S code 7CF839 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7CF839 broadcasting right now?
No active broadcast right now. Last signal was 15d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7CF839, octal 37174071, decimal 8,190,009.
What flights does 7CF839 operate?
Mode-S 7CF839 has broadcast 20 distinct callsigns, including ASY576, TROJ63, TROJ10, TROJ02, TROJ64.