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sensors Mode-S transponder

7C3515

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-KRR · CESSNA 172 Skyhawk · operated by OXFORD AVIATION ACADEMY (AUSTRALIA) PTY LTD

Hex
7C3515
Octal
37032425
Decimal
8,140,053
Country
AU
Tail
VH-KRR
Type
C172
No current signal · last broadcast Jul 26, 05:40 UTC
Flights observed
226
Distinct callsigns
1
Country
AU
Last broadcast
Jul 26, 05:40 UTC

Last known position

Most recent position reported by Mode-S 7C3515.

Country allocation

The ICAO 24-bit address 7C3515 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
KRR - 226 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KRR - Jul 26, 05:05 UTCJul 26, 05:40 UTC35m
2026-07-26 KRR - Jul 26, 04:05 UTCJul 26, 04:30 UTC25m
2026-07-26 KRR MBW → MBW Jul 26, 01:10 UTCJul 26, 01:50 UTC40m
2026-07-25 KRR MBW → MBW Jul 25, 23:10 UTCJul 25, 23:55 UTC45m
2026-07-24 KRR MBW → MBW Jul 24, 23:10 UTCJul 24, 23:45 UTC35m
2026-07-24 KRR - Jul 24, 05:30 UTCJul 24, 06:25 UTC55m
2026-07-24 KRR - Jul 24, 04:10 UTCJul 24, 04:55 UTC45m
2026-07-24 KRR MBW → MBW Jul 24, 01:35 UTCJul 24, 03:10 UTC1h 35m
2026-07-23 KRR MBW → MBW Jul 23, 23:00 UTCJul 24, 00:00 UTC1h 0m
2026-07-23 KRR MBW → MBW Jul 23, 02:40 UTCJul 23, 04:20 UTC1h 40m
2026-07-23 KRR - Jul 23, 01:00 UTCJul 23, 01:40 UTC40m
2026-07-22 KRR - Jul 22, 23:25 UTCJul 23, 00:30 UTC1h 5m
2026-07-22 KRR MBW → MBW Jul 22, 04:45 UTCJul 22, 05:25 UTC40m
2026-07-22 KRR MBW → MBW Jul 22, 00:00 UTCJul 22, 00:40 UTC40m
2026-07-21 KRR MBW → MBW Jul 21, 08:05 UTCJul 21, 10:55 UTC2h 50m
2026-07-21 KRR MBW → MBW Jul 21, 02:05 UTCJul 21, 05:35 UTC3h 30m
2026-07-20 KRR MBW → MBW Jul 20, 22:15 UTCJul 21, 00:50 UTC2h 34m
2026-07-20 KRR MBW → MBW Jul 20, 08:50 UTCJul 20, 09:35 UTC45m
2026-07-20 KRR MBW → MBW Jul 20, 07:50 UTCJul 20, 08:35 UTC45m
2026-07-20 KRR - Jul 20, 05:45 UTCJul 20, 06:20 UTC35m
2026-07-20 KRR - Jul 20, 03:00 UTCJul 20, 03:40 UTC40m
2026-07-19 KRR - Jul 19, 05:35 UTCJul 19, 06:15 UTC40m
2026-07-19 KRR - Jul 19, 04:25 UTCJul 19, 05:05 UTC40m
2026-07-19 KRR MBW → MEB Jul 19, 04:00 UTCJul 19, 04:15 UTC15m
2026-07-19 KRR - Jul 19, 02:25 UTCJul 19, 02:55 UTC30m
2026-07-19 KRR - Jul 19, 01:25 UTCJul 19, 02:05 UTC40m
2026-07-19 KRR MBW → MBW Jul 19, 00:40 UTCJul 19, 01:10 UTC30m
2026-07-18 KRR MBW → MBW Jul 18, 02:29 UTCJul 18, 05:50 UTC3h 21m
2026-07-18 KRR MBW → MBW Jul 18, 00:45 UTCJul 18, 01:30 UTC45m
2026-07-17 KRR MBW → MBW Jul 17, 23:05 UTCJul 17, 23:50 UTC45m
2026-07-17 KRR MBW → MBW Jul 17, 02:39 UTCJul 17, 05:55 UTC3h 15m
2026-07-17 KRR - Jul 17, 00:14 UTCJul 17, 01:00 UTC45m
2026-07-16 KRR - Jul 16, 22:49 UTCJul 16, 23:35 UTC45m
2026-07-16 KRR MBW → MBW Jul 16, 09:30 UTCJul 16, 10:25 UTC55m
2026-07-16 KRR MBW → MBW Jul 16, 02:50 UTCJul 16, 03:25 UTC35m
2026-07-16 KRR MBW → MBW Jul 16, 01:15 UTCJul 16, 01:45 UTC30m
2026-07-15 KRR MBW → MBW Jul 15, 08:10 UTCJul 15, 08:15 UTC5m
2026-07-15 KRR MBW → MBW Jul 15, 04:45 UTCJul 15, 05:30 UTC45m
2026-07-15 KRR - Jul 15, 03:10 UTCJul 15, 03:35 UTC25m
2026-07-15 KRR - Jul 15, 01:30 UTCJul 15, 02:00 UTC30m
2026-07-14 KRR MBW → MBW Jul 14, 22:15 UTCJul 14, 23:00 UTC44m
2026-07-14 KRR MBW → MBW Jul 14, 08:20 UTCJul 14, 10:10 UTC1h 50m
2026-07-14 KRR MBW → MBW Jul 14, 04:40 UTCJul 14, 05:35 UTC55m
2026-07-14 KRR MBW → MBW Jul 14, 01:55 UTCJul 14, 02:25 UTC30m
2026-07-14 KRR - Jul 14, 01:05 UTCJul 14, 01:40 UTC35m
2026-07-14 KRR MBW → MBW Jul 14, 00:15 UTCJul 14, 00:35 UTC20m
2026-07-13 KRR MBW → MBW Jul 13, 03:50 UTCJul 13, 05:15 UTC1h 25m
2026-07-13 KRR MBW → MBW Jul 13, 01:05 UTCJul 13, 01:45 UTC40m
2026-07-12 KRR MBW → MBW Jul 12, 22:55 UTCJul 12, 23:30 UTC35m
2026-07-12 KRR MBW → MBW Jul 12, 00:45 UTCJul 12, 05:01 UTC4h 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 VH-KRR page for operator, model, and routing details .

Mode-S 7C3515 frequently asked

What is Mode-S code 7C3515?
7C3515 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-KRR.
Where is Mode-S 7C3515 registered?
Mode-S code 7C3515 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C3515 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 05:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C3515, octal 37032425, decimal 8,140,053.
What flights does 7C3515 operate?
Mode-S 7C3515 has broadcast 1 distinct callsign, including KRR.