Apparatus

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sensors Mode-S transponder

7C52FF

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-QOH · DE HAVILLAND DHC-8-400 Dash 8 · operated by SUNSTATE AIRLINES (QLD) PTY. LIMITED

Hex
7C52FF
Octal
37051377
Decimal
8,147,711
Country
AU
Tail
VH-QOH
Type
DH8D
No current signal · last broadcast 9h ago
Flights observed
475
Distinct callsigns
20
Country
AU
Last broadcast
9h ago

Last known position

Most recent position reported by Mode-S 7C52FF.

Country allocation

The ICAO 24-bit address 7C52FF 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
QLK77D - 9 2026-07-05
QLK35D - 9 2026-07-12
QLK79D - 8 2026-06-28
QLK78D - 8 2026-07-05
QLK76D - 8 2026-07-08
QLK551D - 8 2026-06-22
QLK575D - 7 2026-06-24
QLK401D - 7 2026-07-05
QLK38D - 7 2026-07-13
QLK589D - 6 2026-06-12
QLK582D - 6 2026-06-13
QLK580D - 6 2026-06-12
QLK576D - 6 2026-06-24
QLK561D - 6 2026-06-24
QLK560D - 6 2026-06-23
QLK455D - 6 2026-07-12
QLK402D - 6 2026-07-08
QLK58D - 5 2026-07-08
QLK586D - 5 2026-06-24
QLK585D - 5 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 QLK59D - Jul 14, 09:10 UTCJul 14, 09:50 UTC40m
2026-07-14 QLK88D - Jul 14, 07:15 UTCJul 14, 07:55 UTC40m
2026-07-14 QLK87D - Jul 14, 05:35 UTCJul 14, 06:15 UTC40m
2026-07-14 QLK469D - Jul 14, 01:50 UTCJul 14, 02:55 UTC1h 5m
2026-07-13 QLK470D - Jul 13, 23:55 UTCJul 14, 00:45 UTC50m
2026-07-13 QLK465D - Jul 13, 22:00 UTCJul 13, 23:00 UTC1h 0m
2026-07-13 QLK462D - Jul 13, 20:25 UTCJul 13, 21:10 UTC45m
2026-07-13 QLK475D - Jul 13, 08:35 UTCJul 13, 10:00 UTC1h 25m
2026-07-13 QLK451D - Jul 13, 07:15 UTCJul 13, 07:50 UTC35m
2026-07-13 QLK444D - Jul 13, 05:40 UTCJul 13, 06:10 UTC30m
2026-07-13 QLK439D - Jul 13, 04:15 UTCJul 13, 04:50 UTC35m
2026-07-13 QLK38D BNK → SYD Jul 13, 01:35 UTCJul 13, 02:55 UTC1h 20m
2026-07-12 QLK35D - Jul 12, 23:50 UTCJul 13, 00:55 UTC1h 5m
2026-07-12 QLK422D - Jul 12, 21:20 UTCJul 12, 22:00 UTC40m
2026-07-12 QLK455D - Jul 12, 07:55 UTCJul 12, 08:35 UTC40m
2026-07-11 QLK224D - Jul 11, 03:35 UTCJul 11, 04:10 UTC35m
2026-07-11 QLK223D - Jul 11, 01:50 UTCJul 11, 02:30 UTC40m
2026-07-10 QLK36D BNK → SYD Jul 10, 21:50 UTCJul 10, 23:05 UTC1h 15m
2026-07-10 QLK37D SYD → BNK Jul 10, 09:20 UTCJul 10, 10:30 UTC1h 10m
2026-07-10 QLK5D TMW → SYD Jul 10, 04:15 UTCJul 10, 05:00 UTC45m
2026-07-10 QLK4D SYD → TMW Jul 10, 02:35 UTCJul 10, 03:15 UTC40m
2026-07-10 QLK434D - Jul 10, 00:50 UTCJul 10, 01:30 UTC40m
2026-07-09 QLK431D - Jul 9, 23:25 UTCJul 9, 23:55 UTC30m
2026-07-09 QLK183D - Jul 9, 09:45 UTCJul 9, 10:40 UTC55m
2026-07-09 QLK182D - Jul 9, 07:50 UTCJul 9, 08:50 UTC1h 0m
2026-07-09 QLK122D - Jul 9, 05:25 UTCJul 9, 06:05 UTC40m
2026-07-09 QLK123D - Jul 9, 03:10 UTCJul 9, 03:50 UTC40m
2026-07-09 QLK438D - Jul 9, 01:45 UTCJul 9, 02:25 UTC40m
2026-07-09 QLK435D - Jul 9, 00:25 UTCJul 9, 00:55 UTC30m
2026-07-08 QLK402D - Jul 8, 21:55 UTCJul 8, 22:45 UTC50m
2026-07-08 QLK76D - Jul 8, 09:25 UTCJul 8, 09:55 UTC30m
2026-07-08 QLK58D - Jul 8, 07:30 UTCJul 8, 08:15 UTC45m
2026-07-08 QLK57D - Jul 8, 05:45 UTCJul 8, 06:30 UTC45m
2026-07-07 QLK467D - Jul 7, 23:10 UTCJul 8, 00:10 UTC1h 0m
2026-07-07 QLK464D - Jul 7, 21:15 UTCJul 7, 22:05 UTC50m
2026-07-07 QLK83D - Jul 7, 08:25 UTCJul 7, 08:55 UTC30m
2026-07-07 QLK82D - Jul 7, 06:15 UTCJul 7, 06:40 UTC25m
2026-07-07 QLK94D - Jul 7, 04:05 UTCJul 7, 05:00 UTC55m
2026-07-07 QLK93D - Jul 7, 02:15 UTCJul 7, 02:55 UTC40m
2026-07-06 QLK901D SWH → MEL Jul 6, 21:45 UTCJul 6, 22:45 UTC1h 0m
2026-07-05 QLK78D - Jul 5, 23:00 UTCJul 5, 23:30 UTC30m
2026-07-05 QLK77D - Jul 5, 21:15 UTCJul 5, 21:55 UTC40m
2026-07-05 QLK401D - Jul 5, 08:40 UTCJul 5, 09:15 UTC35m
2026-07-05 QLK36D BNK → SYD Jul 5, 05:55 UTCJul 5, 07:05 UTC1h 10m
2026-07-05 QLK35D SYD → BNK Jul 5, 04:05 UTCJul 5, 05:15 UTC1h 10m
2026-07-05 QLK404D - Jul 5, 02:30 UTCJul 5, 03:05 UTC35m
2026-07-04 QLK403D - Jul 4, 23:10 UTCJul 4, 23:45 UTC35m
2026-07-04 QLK38D - Jul 4, 01:45 UTCJul 4, 02:50 UTC1h 5m
2026-07-03 QLK35D SYD → BNK Jul 3, 23:55 UTCJul 4, 01:00 UTC1h 5m
2026-07-03 QLK27D - Jul 3, 20:45 UTCJul 3, 21:25 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-QOH page for operator, model, and routing details .

Mode-S 7C52FF frequently asked

What is Mode-S code 7C52FF?
7C52FF is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-QOH.
Where is Mode-S 7C52FF registered?
Mode-S code 7C52FF is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C52FF broadcasting right now?
No active broadcast right now. Last signal was 9h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C52FF, octal 37051377, decimal 8,147,711.
What flights does 7C52FF operate?
Mode-S 7C52FF has broadcast 20 distinct callsigns, including QLK77D, QLK35D, QLK79D, QLK78D, QLK76D.