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 Jul 26, 22:35 UTC
Flights observed
491
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 22:35 UTC

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
QLK354D - 10 2026-07-23
QLK453D - 9 2026-07-20
QLK452D - 9 2026-07-20
QLK355D - 8 2026-07-24
QLK459D - 7 2026-07-15
QLK458D - 7 2026-07-15
QLK324D - 7 2026-07-19
QLK321D - 7 2026-07-13
QLK455D - 6 2026-07-07
QLK405D - 6 2026-07-18
QLK362D - 6 2026-07-22
QLK337D - 6 2026-07-25
QLK336D - 6 2026-07-25
QLK323D - 6 2026-07-13
QLK322D - 6 2026-07-13
QLK539D - 5 2026-06-17
QLK538D - 5 2026-06-17
QLK450D - 5 2026-05-31
QLK404D - 5 2026-07-18
QLK367D - 5 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QLK376D - Jul 26, 22:10 UTCJul 26, 22:35 UTC25m
2026-07-26 QLK319D - Jul 26, 20:45 UTCJul 26, 21:10 UTC25m
2026-07-26 QLK326D - Jul 26, 09:40 UTCJul 26, 10:05 UTC25m
2026-07-26 QLK543D - Jul 26, 07:25 UTCJul 26, 08:05 UTC40m
2026-07-26 QLK542D - Jul 26, 03:55 UTCJul 26, 04:15 UTC20m
2026-07-25 QLK337D - Jul 25, 07:10 UTCJul 25, 07:50 UTC40m
2026-07-25 QLK336D - Jul 25, 05:30 UTCJul 25, 06:00 UTC30m
2026-07-25 QLK379D - Jul 25, 03:55 UTCJul 25, 04:30 UTC35m
2026-07-25 QLK378D - Jul 25, 02:40 UTCJul 25, 03:10 UTC30m
2026-07-25 QLK365D - Jul 25, 01:10 UTCJul 25, 01:45 UTC35m
2026-07-24 QLK355D - Jul 24, 23:30 UTCJul 24, 23:40 UTC10m
2026-07-24 QLK355D - Jul 24, 22:40 UTCJul 24, 22:50 UTC10m
2026-07-23 QLK240D - Jul 23, 20:55 UTCJul 23, 21:25 UTC30m
2026-07-23 QLK240D - Jul 23, 19:40 UTCJul 23, 20:20 UTC40m
2026-07-23 QLK367D - Jul 23, 09:25 UTCJul 23, 10:05 UTC40m
2026-07-23 QLK357D - Jul 23, 07:05 UTCJul 23, 07:55 UTC50m
2026-07-23 QLK354D - Jul 23, 02:25 UTCJul 23, 02:40 UTC15m
2026-07-23 QLK354D - Jul 23, 01:35 UTCJul 23, 01:50 UTC15m
2026-07-22 QLK362D - Jul 22, 23:20 UTCJul 23, 00:00 UTC40m
2026-07-22 QLK835D - Jul 22, 02:55 UTCJul 22, 03:35 UTC40m
2026-07-21 QLK806D - Jul 21, 23:55 UTCJul 22, 00:35 UTC40m
2026-07-21 QLK319D - Jul 21, 20:50 UTCJul 21, 21:25 UTC35m
2026-07-21 QLK326D - Jul 21, 09:35 UTCJul 21, 10:00 UTC25m
2026-07-21 QLK337D - Jul 21, 07:30 UTCJul 21, 08:05 UTC35m
2026-07-21 QLK336D - Jul 21, 05:35 UTCJul 21, 06:10 UTC35m
2026-07-21 QLK303D - Jul 21, 04:35 UTCJul 21, 04:55 UTC20m
2026-07-21 QLK303D - Jul 21, 03:55 UTCJul 21, 04:30 UTC35m
2026-07-21 QLK302D - Jul 21, 02:30 UTCJul 21, 02:55 UTC25m
2026-07-20 QLK453D - Jul 20, 23:55 UTCJul 21, 00:25 UTC30m
2026-07-20 QLK452D - Jul 20, 20:55 UTCJul 20, 21:30 UTC35m
2026-07-20 QLK547D - Jul 20, 06:00 UTCJul 20, 06:35 UTC35m
2026-07-20 QLK544D - Jul 20, 01:25 UTCJul 20, 01:55 UTC30m
2026-07-19 QLK453D - Jul 19, 23:35 UTCJul 20, 00:10 UTC35m
2026-07-19 QLK452D - Jul 19, 20:40 UTCJul 19, 21:15 UTC35m
2026-07-19 QLK409D - Jul 19, 10:15 UTCJul 19, 10:55 UTC40m
2026-07-19 QLK412D - Jul 19, 07:40 UTCJul 19, 08:15 UTC35m
2026-07-19 QLK325D - Jul 19, 06:10 UTCJul 19, 06:40 UTC30m
2026-07-19 QLK324D - Jul 19, 04:45 UTCJul 19, 05:15 UTC30m
2026-07-18 QLK369D - Jul 18, 07:30 UTCJul 18, 08:10 UTC40m
2026-07-18 QLK368D - Jul 18, 05:10 UTCJul 18, 05:50 UTC40m
2026-07-18 QLK405D - Jul 18, 03:00 UTCJul 18, 03:35 UTC35m
2026-07-18 QLK404D - Jul 18, 00:10 UTCJul 18, 00:45 UTC35m
2026-07-17 QLK329D - Jul 17, 21:50 UTCJul 17, 22:29 UTC40m
2026-07-17 QLK340D - Jul 17, 10:40 UTCJul 17, 11:15 UTC35m
2026-07-17 QLK457D - Jul 17, 07:50 UTCJul 17, 08:30 UTC40m
2026-07-17 QLK456D - Jul 17, 04:49 UTCJul 17, 05:20 UTC30m
2026-07-17 QLK864D - Jul 17, 01:25 UTCJul 17, 03:25 UTC2h 0m
2026-07-16 QLK863D - Jul 16, 22:40 UTCJul 17, 00:35 UTC1h 55m
2026-07-16 QLK367D - Jul 16, 09:50 UTCJul 16, 10:29 UTC40m
2026-07-16 QLK357D - Jul 16, 08:00 UTCJul 16, 08:15 UTC15m

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 Jul 26, 22:35 UTC.
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 QLK354D, QLK453D, QLK452D, QLK355D, QLK459D.