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sensors Mode-S transponder

7C68B4

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-UYU · EMBRAER ERJ-190-100 · operated by ALLIANCE AIRLINES PTY LIMITED

Hex
7C68B4
Octal
37064264
Decimal
8,153,268
Country
AU
Tail
VH-UYU
Type
E190
No current signal · last broadcast Jul 26, 23:00 UTC
Flights observed
326
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 23:00 UTC

Last known position

Most recent position reported by Mode-S 7C68B4.

Country allocation

The ICAO 24-bit address 7C68B4 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
QLK1984 - 12 2026-07-17
QLK1983 - 12 2026-07-17
QLK1943 - 11 2026-07-14
QLK1944 - 10 2026-07-14
QLK1918 - 8 2026-07-23
QLK1803 - 8 2026-07-05
QLK1955 - 7 2026-06-26
QLK1917 - 7 2026-07-17
QLK1956 - 6 2026-06-26
QLK1885 - 6 2026-07-23
QLK1848 - 6 2026-07-23
QLK1846 - 6 2026-07-25
QLK1804 - 6 2026-07-10
QLK1988 - 5 2026-07-02
QLK1987 - 5 2026-07-07
QLK1950 - 5 2026-07-21
QLK1949 - 5 2026-07-21
QLK1946 - 5 2026-07-20
QLK1945 - 5 2026-07-20
QLK1888 - 5 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QLK2680 - Jul 26, 22:40 UTCJul 26, 23:00 UTC20m
2026-07-26 QLK1923 - Jul 26, 07:40 UTCJul 26, 08:20 UTC40m
2026-07-26 QLK1922 - Jul 26, 05:50 UTCJul 26, 06:25 UTC35m
2026-07-25 QLK1896 BNE → BNE Jul 25, 23:25 UTCJul 26, 04:40 UTC5h 15m
2026-07-25 QLK1846 BNE → BNE Jul 25, 05:10 UTCJul 25, 07:55 UTC2h 45m
2026-07-25 QLK1844 BNE → BNE Jul 25, 00:45 UTCJul 25, 03:35 UTC2h 50m
2026-07-24 QLK1800 ADL → BNE Jul 24, 21:15 UTCJul 24, 23:15 UTC2h 0m
2026-07-24 QLK1809 BNE → ADL Jul 24, 07:40 UTCJul 24, 10:15 UTC2h 35m
2026-07-24 QLK1825 - Jul 24, 05:25 UTCJul 24, 06:40 UTC1h 15m
2026-07-24 QLK1824 - Jul 24, 03:05 UTCJul 24, 04:25 UTC1h 20m
2026-07-23 QLK1918 BNE → BNE Jul 23, 23:00 UTCJul 24, 01:30 UTC2h 30m
2026-07-23 QLK1848 BNE → BNE Jul 23, 07:20 UTCJul 23, 21:35 UTC14h 15m
2026-07-23 QLK1885 - Jul 23, 05:00 UTCJul 23, 06:15 UTC1h 15m
2026-07-22 QLK1885 - Jul 22, 04:40 UTCJul 22, 05:25 UTC45m
2026-07-21 QLK1888 - Jul 21, 07:10 UTCJul 22, 05:25 UTC22h 15m
2026-07-21 QLK1950 - Jul 21, 04:05 UTCJul 21, 05:35 UTC1h 30m
2026-07-21 QLK1949 - Jul 21, 01:30 UTCJul 21, 02:55 UTC1h 25m
2026-07-20 QLK1946 - Jul 20, 22:50 UTCJul 21, 00:30 UTC1h 40m
2026-07-20 QLK1945 - Jul 20, 20:30 UTCJul 20, 22:00 UTC1h 30m
2026-07-20 QLK1802 ADL → BNE Jul 20, 02:35 UTCJul 20, 04:40 UTC2h 5m
2026-07-19 QLK1811 - Jul 19, 11:15 UTCJul 19, 11:45 UTC30m
2026-07-19 QLK1811 - Jul 19, 09:20 UTCJul 19, 10:15 UTC55m
2026-07-19 QLK1875 BNE → BNE Jul 19, 01:25 UTCJul 19, 08:00 UTC6h 35m
2026-07-18 QLK1821 - Jul 18, 22:10 UTCJul 18, 23:30 UTC1h 20m
2026-07-18 QLK1828 - Jul 18, 05:10 UTCJul 18, 06:25 UTC1h 15m
2026-07-18 QLK1844 BNE → BNE Jul 18, 00:45 UTCJul 18, 03:40 UTC2h 56m
2026-07-17 QLK1833 - Jul 17, 20:55 UTCJul 17, 21:34 UTC40m
2026-07-17 QLK1833 - Jul 17, 20:15 UTCJul 17, 20:25 UTC10m
2026-07-17 QLK1830 - Jul 17, 07:44 UTCJul 17, 08:59 UTC1h 15m
2026-07-17 QLK1984 - Jul 17, 04:44 UTCJul 17, 05:45 UTC1h 0m
2026-07-17 QLK1983 - Jul 17, 02:50 UTCJul 17, 03:50 UTC1h 0m
2026-07-17 QLK1917 - Jul 17, 00:50 UTCJul 17, 01:25 UTC35m
2026-07-16 QLK1918 - Jul 16, 22:49 UTCJul 16, 23:20 UTC30m
2026-07-15 QLK1984 - Jul 15, 04:35 UTCJul 15, 05:35 UTC1h 0m
2026-07-15 QLK1983 - Jul 15, 02:40 UTCJul 15, 03:40 UTC1h 0m
2026-07-15 QLK1917 - Jul 15, 01:00 UTCJul 15, 01:35 UTC35m
2026-07-14 QLK1918 - Jul 14, 23:00 UTCJul 14, 23:35 UTC35m
2026-07-14 QLK1944 SYD → BNE Jul 14, 08:30 UTCJul 14, 21:45 UTC13h 15m
2026-07-14 QLK1943 MEL → SYD Jul 14, 01:20 UTCJul 14, 07:00 UTC5h 40m
2026-07-13 QLK1944 SYD → MEL Jul 13, 09:00 UTCJul 14, 00:05 UTC15h 5m
2026-07-13 QLK1943 MEL → SYD Jul 13, 01:45 UTCJul 13, 07:45 UTC6h 0m
2026-07-12 QLK1944 SYD → MEL Jul 12, 08:45 UTCJul 13, 00:01 UTC15h 15m
2026-07-12 QLK1943 MEL → SYD Jul 12, 01:25 UTCJul 12, 07:25 UTC6h 0m
2026-07-11 QLK1941 - Jul 11, 23:35 UTCJul 12, 00:15 UTC40m
2026-07-11 QLK1944 SYD → MEL Jul 11, 01:05 UTCJul 12, 00:15 UTC23h 10m
2026-07-10 QLK1943 BNE → SYD Jul 10, 06:10 UTCJul 10, 23:40 UTC17h 30m
2026-07-10 QLK1804 ADL → BNE Jul 10, 02:45 UTCJul 10, 04:55 UTC2h 10m
2026-07-09 QLK1795 - Jul 9, 23:15 UTCJul 10, 00:50 UTC1h 35m
2026-07-09 QLK1794 - Jul 9, 20:55 UTCJul 9, 22:15 UTC1h 20m
2026-07-08 QLK1799 - Jul 8, 09:35 UTCJul 8, 11:10 UTC1h 35m

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

Mode-S 7C68B4 frequently asked

What is Mode-S code 7C68B4?
7C68B4 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-UYU.
Where is Mode-S 7C68B4 registered?
Mode-S code 7C68B4 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C68B4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 23:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C68B4, octal 37064264, decimal 8,153,268.
What flights does 7C68B4 operate?
Mode-S 7C68B4 has broadcast 20 distinct callsigns, including QLK1984, QLK1983, QLK1943, QLK1944, QLK1918.