Apparatus

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sensors Mode-S transponder

7C530B

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C530B
Octal
37051413
Decimal
8,147,723
Country
AU
Tail
VH-QOT
Type
DH8D
No current signal · last broadcast 8m ago
Flights observed
247
Distinct callsigns
20
Country
AU
Last broadcast
8m ago

Last known position

Most recent position reported by Mode-S 7C530B.

Country allocation

The ICAO 24-bit address 7C530B 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
QLK455D - 4 2026-05-28
QLK453D - 4 2026-05-28
QLK452D - 4 2026-05-27
QLK450D - 4 2026-05-25
QLK96D - 3 2026-05-15
QLK95D - 3 2026-05-15
QLK92D - 3 2026-05-17
QLK91D - 3 2026-05-16
QLK7D - 3 2026-05-20
QLK77D - 3 2026-05-22
QLK6D - 3 2026-05-20
QLK5D - 3 2026-05-21
QLK59D - 3 2026-05-16
QLK539D - 3 2026-05-26
QLK538D - 3 2026-05-26
QLK50D - 3 2026-05-16
QLK4D - 3 2026-05-21
QLK459D - 3 2026-05-27
QLK458D - 3 2026-05-27
QLK451D - 3 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 QLK404D - May 30, 00:05 UTCMay 30, 00:45 UTC40m
2026-05-29 QLK367D - May 29, 10:10 UTCMay 29, 10:45 UTC35m
2026-05-29 QLK357D - May 29, 08:35 UTCMay 29, 08:50 UTC15m
2026-05-29 QLK357D - May 29, 07:25 UTCMay 29, 07:45 UTC20m
2026-05-29 QLK354D - May 29, 02:40 UTCMay 29, 02:55 UTC15m
2026-05-29 QLK354D - May 29, 01:30 UTCMay 29, 01:55 UTC25m
2026-05-28 QLK362D - May 28, 23:40 UTCMay 29, 00:15 UTC35m
2026-05-28 QLK310D - May 28, 20:30 UTCMay 28, 22:15 UTC1h 45m
2026-05-28 QLK317D - May 28, 11:35 UTCMay 28, 13:25 UTC1h 50m
2026-05-28 QLK337D - May 28, 10:00 UTCMay 28, 10:40 UTC40m
2026-05-28 QLK336D - May 28, 07:25 UTCMay 28, 08:15 UTC50m
2026-05-28 QLK455D - May 28, 05:25 UTCMay 28, 06:05 UTC40m
2026-05-28 QLK454D - May 28, 02:05 UTCMay 28, 02:50 UTC45m
2026-05-28 QLK453D - May 28, 00:10 UTCMay 28, 00:50 UTC40m
2026-05-27 QLK452D - May 27, 20:55 UTCMay 27, 21:40 UTC45m
2026-05-27 QLK459D - May 27, 10:40 UTCMay 27, 11:10 UTC30m
2026-05-27 QLK458D - May 27, 07:30 UTCMay 27, 08:05 UTC35m
2026-05-27 QLK323D - May 27, 05:09 UTCMay 27, 05:45 UTC35m
2026-05-27 QLK322D - May 27, 03:34 UTCMay 27, 04:14 UTC40m
2026-05-26 QLK826D - May 26, 21:40 UTCMay 26, 23:29 UTC1h 50m
2026-05-26 QLK826D - May 26, 19:55 UTCMay 26, 20:45 UTC50m
2026-05-26 QLK459D - May 26, 08:30 UTCMay 26, 09:09 UTC40m
2026-05-26 QLK458D - May 26, 05:30 UTCMay 26, 06:14 UTC45m
2026-05-26 QLK539D - May 26, 03:45 UTCMay 26, 04:24 UTC40m
2026-05-26 QLK538D - May 26, 02:24 UTCMay 26, 02:55 UTC30m
2026-05-25 QLK451D - May 25, 22:44 UTCMay 25, 23:19 UTC35m
2026-05-25 QLK450D - May 25, 19:44 UTCMay 25, 20:30 UTC45m
2026-05-25 QLK459D - May 25, 08:35 UTCMay 25, 09:15 UTC40m
2026-05-25 QLK458D - May 25, 05:40 UTCMay 25, 06:15 UTC35m
2026-05-25 QLK455D - May 25, 03:55 UTCMay 25, 04:35 UTC40m
2026-05-24 QLK451D - May 24, 23:00 UTCMay 24, 23:10 UTC10m
2026-05-24 QLK450D - May 24, 19:50 UTCMay 24, 20:25 UTC35m
2026-05-23 QLK312D - May 23, 23:20 UTCMay 24, 01:05 UTC1h 45m
2026-05-23 QLK472D - May 23, 08:40 UTCMay 23, 09:40 UTC1h 0m
2026-05-23 QLK475D - May 23, 06:40 UTCMay 23, 07:40 UTC1h 0m
2026-05-23 QLK470D - May 23, 04:55 UTCMay 23, 05:50 UTC55m
2026-05-23 QLK471D - May 23, 02:50 UTCMay 23, 03:40 UTC50m
2026-05-23 QLK466D - May 23, 01:00 UTCMay 23, 02:00 UTC1h 0m
2026-05-22 QLK77D - May 22, 21:15 UTCMay 22, 21:50 UTC35m
2026-05-22 QLK76D - May 22, 09:00 UTCMay 22, 09:35 UTC35m
2026-05-22 QLK475D - May 22, 07:00 UTCMay 22, 08:00 UTC1h 0m
2026-05-22 QLK443D - May 22, 05:40 UTCMay 22, 06:10 UTC30m
2026-05-22 QLK38D - May 22, 01:40 UTCMay 22, 02:50 UTC1h 10m
2026-05-21 QLK35D SYD → BNK May 21, 23:50 UTCMay 22, 00:55 UTC1h 5m
2026-05-21 QLK25D - May 21, 07:15 UTCMay 21, 08:10 UTC55m
2026-05-21 QLK24D - May 21, 05:50 UTCMay 21, 06:25 UTC35m
2026-05-21 QLK5D TMW → SYD May 21, 03:50 UTCMay 21, 04:30 UTC40m
2026-05-21 QLK4D SYD → TMW May 21, 02:15 UTCMay 21, 02:55 UTC40m
2026-05-21 QLK3D - May 21, 00:00 UTCMay 21, 00:45 UTC45m
2026-05-20 QLK2D SYD → TMW May 20, 22:30 UTCMay 20, 23:15 UTC45m

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-QOT page for operator, model, and routing details .

Mode-S 7C530B frequently asked

What is Mode-S code 7C530B?
7C530B is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-QOT.
Where is Mode-S 7C530B registered?
Mode-S code 7C530B is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C530B broadcasting right now?
No active broadcast right now. Last signal was 8m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C530B, octal 37051413, decimal 8,147,723.
What flights does 7C530B operate?
Mode-S 7C530B has broadcast 20 distinct callsigns, including QLK455D, QLK453D, QLK452D, QLK450D, QLK96D.