Apparatus

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sensors Mode-S transponder

7C68AD

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C68AD
Octal
37064255
Decimal
8,153,261
Country
AU
Tail
VH-UYN
Type
E190
No current signal · last broadcast Jul 26, 08:05 UTC
Flights observed
288
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 08:05 UTC

Last known position

Most recent position reported by Mode-S 7C68AD.

Country allocation

The ICAO 24-bit address 7C68AD 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
QLK1983 - 9 2026-07-20
QLK1982 - 9 2026-07-20
QLK1984 - 8 2026-07-20
QLK1981 - 7 2026-07-19
QLK1848 - 7 2026-06-25
QLK1943 - 6 2026-07-17
QLK1823 - 6 2026-06-13
QLK1822 - 6 2026-06-12
QLK1809 - 6 2026-07-20
QLK1928 - 5 2026-05-29
QLK1918 - 5 2026-06-30
QLK1885 - 5 2026-06-29
QLK1816 - 5 2026-07-20
QLK1990 - 4 2026-06-30
QLK1948 - 4 2026-06-26
QLK1947 - 4 2026-06-25
QLK1944 - 4 2026-07-16
QLK1917 - 4 2026-05-07
QLK1890 - 4 2026-06-15
QLK1849 - 4 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QLK1874 BNE → BNE Jul 26, 01:50 UTCJul 26, 08:00 UTC6h 11m
2026-07-23 QLK1956 - Jul 23, 09:10 UTCJul 23, 10:25 UTC1h 15m
2026-07-23 QLK1955 - Jul 23, 06:25 UTCJul 23, 08:05 UTC1h 40m
2026-07-21 QLK1921 - Jul 21, 22:00 UTCJul 21, 22:30 UTC30m
2026-07-21 QLK1920 - Jul 21, 20:15 UTCJul 21, 20:45 UTC30m
2026-07-21 QLK1806 ADL → BNE Jul 21, 04:10 UTCJul 21, 06:15 UTC2h 5m
2026-07-20 QLK1816 ADL → ADL Jul 20, 22:30 UTCJul 21, 03:15 UTC4h 45m
2026-07-20 QLK1809 BNE → ADL Jul 20, 07:25 UTCJul 20, 09:50 UTC2h 25m
2026-07-20 QLK1984 - Jul 20, 04:40 UTCJul 20, 05:40 UTC1h 0m
2026-07-20 QLK1983 - Jul 20, 02:40 UTCJul 20, 03:40 UTC1h 0m
2026-07-20 QLK1982 - Jul 20, 00:15 UTCJul 20, 01:15 UTC1h 0m
2026-07-19 QLK1981 - Jul 19, 22:15 UTCJul 19, 23:20 UTC1h 5m
2026-07-19 QLK1954 - Jul 19, 07:55 UTCJul 19, 09:30 UTC1h 35m
2026-07-19 QLK1953 - Jul 19, 05:25 UTCJul 19, 06:55 UTC1h 30m
2026-07-18 QLK1895 BNE → BNE Jul 18, 23:15 UTCJul 19, 04:25 UTC5h 10m
2026-07-18 QLK1871 - Jul 18, 20:40 UTCJul 18, 21:55 UTC1h 15m
2026-07-18 QLK1871 - Jul 18, 01:20 UTCJul 18, 21:55 UTC20h 36m
2026-07-17 QLK1943 SYD → SYD Jul 17, 08:54 UTCJul 17, 23:50 UTC14h 55m
2026-07-17 QLK1943 MEL → SYD Jul 17, 01:25 UTCJul 17, 07:30 UTC6h 5m
2026-07-16 QLK1944 SYD → MEL Jul 16, 09:55 UTCJul 16, 23:55 UTC14h 0m
2026-07-16 QLK1943 MEL → SYD Jul 16, 01:45 UTCJul 16, 08:20 UTC6h 35m
2026-07-15 QLK1944 - Jul 15, 09:00 UTCJul 16, 00:20 UTC15h 20m
2026-07-15 QLK1943 MEL → SYD Jul 15, 01:45 UTCJul 15, 07:30 UTC5h 45m
2026-07-14 QLK1868 BNE → MEL Jul 14, 06:10 UTCJul 15, 00:15 UTC18h 4m
2026-07-14 QLK1802 ADL → BNE Jul 14, 02:30 UTCJul 14, 04:40 UTC2h 10m
2026-07-13 QLK1993 SYD → ADL Jul 13, 22:30 UTCJul 14, 00:20 UTC1h 50m
2026-07-13 QLK1814 - Jul 13, 20:20 UTCJul 13, 20:55 UTC35m
2026-07-13 QLK1813 - Jul 13, 06:50 UTCJul 13, 07:25 UTC35m
2026-07-13 QLK1992 ADL → SYD Jul 13, 04:00 UTCJul 13, 05:35 UTC1h 35m
2026-07-13 QLK1805 BNE → ADL Jul 13, 00:40 UTCJul 13, 03:01 UTC2h 20m
2026-07-12 QLK1989 BNE → BNE Jul 12, 04:40 UTCJul 12, 09:35 UTC4h 55m
2026-07-11 QLK1882 BNE → BNE Jul 11, 22:20 UTCJul 12, 03:20 UTC5h 0m
2026-07-11 QLK1808 - Jul 11, 08:05 UTCJul 11, 10:10 UTC2h 5m
2026-07-10 QLK1795 - Jul 10, 23:40 UTCJul 11, 01:15 UTC1h 35m
2026-07-10 QLK1794 - Jul 10, 21:30 UTCJul 10, 22:45 UTC1h 15m
2026-07-10 QLK1799 - Jul 10, 09:30 UTCJul 10, 11:05 UTC1h 35m
2026-07-10 QLK1798 - Jul 10, 07:00 UTCJul 10, 08:20 UTC1h 20m
2026-07-09 QLK1816 ADL → ADL Jul 9, 22:40 UTCJul 10, 03:55 UTC5h 15m
2026-07-09 QLK1905 - Jul 9, 09:40 UTCJul 9, 10:10 UTC30m
2026-07-09 QLK1905 - Jul 9, 06:25 UTCJul 9, 06:35 UTC10m
2026-07-09 QLK1906 - Jul 9, 01:35 UTCJul 9, 02:05 UTC30m
2026-07-08 QLK1907 WYA → ADL Jul 8, 23:55 UTCJul 9, 00:20 UTC25m
2026-07-04 QLK1980 - Jul 4, 03:05 UTCJul 4, 03:15 UTC10m
2026-07-03 QLK1889 - Jul 3, 21:30 UTCJul 3, 21:40 UTC10m
2026-07-03 QLK1853 - Jul 3, 04:25 UTCJul 3, 04:35 UTC10m
2026-07-02 QLK1904 - Jul 2, 22:45 UTCJul 2, 23:15 UTC30m
2026-07-02 QLK1811 BNE → ADL Jul 2, 08:55 UTCJul 2, 11:50 UTC2h 55m
2026-07-02 QLK1862 BNE → BNE Jul 2, 03:05 UTCJul 2, 07:15 UTC4h 10m
2026-07-02 QLK1982 NTL → BNE Jul 2, 00:20 UTCJul 2, 01:25 UTC1h 5m
2026-07-01 QLK1981 - Jul 1, 22:30 UTCJul 1, 23:40 UTC1h 10m

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

Mode-S 7C68AD frequently asked

What is Mode-S code 7C68AD?
7C68AD is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-UYN.
Where is Mode-S 7C68AD registered?
Mode-S code 7C68AD is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C68AD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 08:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C68AD, octal 37064255, decimal 8,153,261.
What flights does 7C68AD operate?
Mode-S 7C68AD has broadcast 20 distinct callsigns, including QLK1983, QLK1982, QLK1984, QLK1981, QLK1848.