Apparatus

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sensors Mode-S transponder

7C39F1

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C39F1
Octal
37034761
Decimal
8,141,297
Country
AU
Tail
VH-LQB
Type
DH8D
No current signal · last broadcast 17h ago
Flights observed
352
Distinct callsigns
20
Country
AU
Last broadcast
17h ago

Last known position

Most recent position reported by Mode-S 7C39F1.

Country allocation

The ICAO 24-bit address 7C39F1 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
QLK381D - 7 2026-06-26
QLK459D - 6 2026-06-24
QLK454D - 6 2026-06-26
QLK450D - 6 2026-07-07
QLK380D - 6 2026-06-26
QLK357D - 6 2026-07-02
QLK354D - 6 2026-06-27
QLK458D - 5 2026-06-24
QLK455D - 5 2026-06-26
QLK452D - 5 2026-06-03
QLK402D - 5 2026-07-10
QLK367D - 5 2026-07-02
QLK362D - 5 2026-06-26
QLK326D - 5 2026-06-01
QLK319D - 5 2026-06-01
QLK317D - 5 2026-05-27
QLK551D - 4 2026-05-17
QLK547D - 4 2026-07-04
QLK453D - 4 2026-06-03
QLK451D - 4 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 QLK639D - Jul 13, 07:55 UTCJul 13, 08:35 UTC40m
2026-07-13 QLK638D - Jul 13, 06:25 UTCJul 13, 07:01 UTC35m
2026-07-13 QLK110D - Jul 13, 04:00 UTCJul 13, 04:45 UTC45m
2026-07-13 QLK109D - Jul 13, 02:35 UTCJul 13, 03:05 UTC30m
2026-07-13 QLK3D - Jul 13, 00:01 UTCJul 13, 00:40 UTC40m
2026-07-12 QLK2D SYD → TMW Jul 12, 22:35 UTCJul 12, 23:20 UTC45m
2026-07-12 QLK19D - Jul 12, 20:40 UTCJul 12, 21:30 UTC50m
2026-07-12 QLK26D - Jul 12, 09:25 UTCJul 12, 10:05 UTC40m
2026-07-12 QLK110D - Jul 12, 04:05 UTCJul 12, 04:40 UTC35m
2026-07-12 QLK109D - Jul 12, 02:25 UTCJul 12, 03:01 UTC35m
2026-07-12 QLK163D PQQ → SYD Jul 12, 00:15 UTCJul 12, 01:05 UTC50m
2026-07-11 QLK164D - Jul 11, 05:45 UTCJul 11, 06:20 UTC35m
2026-07-11 QLK103D - Jul 11, 00:55 UTCJul 11, 01:55 UTC1h 0m
2026-07-10 QLK102D - Jul 10, 23:30 UTCJul 11, 00:10 UTC40m
2026-07-10 QLK402D - Jul 10, 21:55 UTCJul 10, 22:25 UTC30m
2026-07-10 QLK401D - Jul 10, 09:05 UTCJul 10, 09:40 UTC35m
2026-07-10 QLK226D - Jul 10, 06:55 UTCJul 10, 08:05 UTC1h 10m
2026-07-10 QLK225D - Jul 10, 05:20 UTCJul 10, 05:55 UTC35m
2026-07-10 QLK23D - Jul 10, 03:45 UTCJul 10, 04:25 UTC40m
2026-07-10 QLK22D - Jul 10, 02:15 UTCJul 10, 02:55 UTC40m
2026-07-10 QLK39D - Jul 10, 00:30 UTCJul 10, 01:10 UTC40m
2026-07-09 QLK28D - Jul 9, 23:10 UTCJul 9, 23:40 UTC30m
2026-07-09 QLK27D - Jul 9, 20:50 UTCJul 9, 21:30 UTC40m
2026-07-09 QLK44D - Jul 9, 09:20 UTCJul 9, 09:45 UTC25m
2026-07-09 QLK208D - Jul 9, 07:05 UTCJul 9, 08:00 UTC55m
2026-07-09 QLK207D - Jul 9, 05:15 UTCJul 9, 05:55 UTC40m
2026-07-09 QLK206D - Jul 9, 03:25 UTCJul 9, 04:20 UTC55m
2026-07-09 QLK205D SYD → ABX Jul 9, 01:45 UTCJul 9, 02:35 UTC50m
2026-07-07 QLK202D - Jul 7, 23:30 UTCJul 8, 00:25 UTC55m
2026-07-07 QLK209D SYD → ABX Jul 7, 09:00 UTCJul 7, 09:55 UTC55m
2026-07-07 QLK450D - Jul 7, 07:15 UTCJul 7, 08:00 UTC45m
2026-07-07 QLK441D - Jul 7, 05:50 UTCJul 7, 06:20 UTC30m
2026-07-07 QLK204D ABX → SYD Jul 7, 00:35 UTCJul 7, 01:35 UTC1h 0m
2026-07-06 QLK203D SYD → ABX Jul 6, 22:55 UTCJul 6, 23:50 UTC55m
2026-07-06 QLK101D - Jul 6, 20:40 UTCJul 6, 21:45 UTC1h 5m
2026-07-06 QLK108D - Jul 6, 09:30 UTCJul 6, 10:20 UTC50m
2026-07-06 QLK25D - Jul 6, 07:20 UTCJul 6, 08:30 UTC1h 10m
2026-07-06 QLK24D - Jul 6, 05:50 UTCJul 6, 06:25 UTC35m
2026-07-06 QLK181D - Jul 6, 00:55 UTCJul 6, 01:55 UTC1h 0m
2026-07-05 QLK180D - Jul 5, 23:10 UTCJul 6, 00:10 UTC1h 0m
2026-07-05 QLK220D - Jul 5, 20:50 UTCJul 5, 21:40 UTC50m
2026-07-05 QLK227D - Jul 5, 09:35 UTCJul 5, 10:05 UTC30m
2026-07-05 QLK208D - Jul 5, 07:05 UTCJul 5, 08:10 UTC1h 5m
2026-07-05 QLK207D - Jul 5, 05:35 UTCJul 5, 06:30 UTC55m
2026-07-05 QLK440D - Jul 5, 03:50 UTCJul 5, 04:35 UTC45m
2026-07-05 QLK437D - Jul 5, 02:25 UTCJul 5, 03:00 UTC35m
2026-07-04 QLK432D - Jul 4, 23:45 UTCJul 5, 00:20 UTC35m
2026-07-04 QLK429D - Jul 4, 22:15 UTCJul 4, 22:45 UTC30m
2026-07-04 QLK420D - Jul 4, 20:35 UTCJul 4, 21:10 UTC35m
2026-07-04 QLK315D - Jul 4, 06:30 UTCJul 4, 08:20 UTC1h 50m

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

Mode-S 7C39F1 frequently asked

What is Mode-S code 7C39F1?
7C39F1 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-LQB.
Where is Mode-S 7C39F1 registered?
Mode-S code 7C39F1 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C39F1 broadcasting right now?
No active broadcast right now. Last signal was 17h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C39F1, octal 37034761, decimal 8,141,297.
What flights does 7C39F1 operate?
Mode-S 7C39F1 has broadcast 20 distinct callsigns, including QLK381D, QLK459D, QLK454D, QLK450D, QLK380D.