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 7h ago
Flights observed
115
Distinct callsigns
20
Country
AU
Last broadcast
7h ago

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 - 7 2026-04-30
QLK1982 - 7 2026-05-29
QLK1984 - 6 2026-04-30
QLK1848 - 6 2026-05-22
QLK1981 - 5 2026-05-28
QLK1928 - 5 2026-05-29
QLK1917 - 4 2026-05-07
QLK1849 - 4 2026-05-29
QLK1918 - 3 2026-04-28
QLK1890 - 3 2026-05-26
QLK1803 - 3 2026-04-16
QLK1998 - 2 2026-04-16
QLK1997 - 2 2026-04-16
QLK1996 - 2 2026-04-16
QLK1972 - 2 2026-05-26
QLK1971 - 2 2026-05-25
QLK1909 - 2 2026-04-17
QLK1894 - 2 2026-04-27
QLK1891 - 2 2026-05-02
QLK1887 - 2 2026-04-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 QLK1849 BNE → BNE May 29, 07:15 UTCMay 29, 21:35 UTC14h 20m
2026-05-29 QLK1928 BNE → BNE May 29, 03:05 UTCMay 29, 06:00 UTC2h 55m
2026-05-29 QLK1982 - May 29, 00:25 UTCMay 29, 01:25 UTC1h 0m
2026-05-28 QLK1981 - May 28, 22:10 UTCMay 28, 23:20 UTC1h 10m
2026-05-28 QLK1933 BNE → BNE May 28, 08:55 UTCMay 28, 11:55 UTC3h 0m
2026-05-26 QLK1885 - May 26, 11:34 UTCMay 27, 05:59 UTC18h 25m
2026-05-26 QLK1890 BNE → BNE May 26, 10:34 UTCMay 27, 05:59 UTC19h 25m
2026-05-26 QLK1846 BNE → BNE May 26, 05:20 UTCMay 26, 07:59 UTC2h 40m
2026-05-26 QLK1972 ABX → BNE May 26, 02:19 UTCMay 26, 04:04 UTC1h 45m
2026-05-25 QLK1971 - May 25, 23:45 UTCMay 26, 01:20 UTC1h 35m
2026-05-25 QLK1888 BNE → BNE May 25, 07:25 UTCMay 25, 21:49 UTC14h 25m
2026-05-25 QLK1950 - May 25, 03:55 UTCMay 25, 05:30 UTC1h 35m
2026-05-24 QLK1949 - May 24, 23:00 UTCMay 25, 02:50 UTC3h 50m
2026-05-24 QLK1945 - May 24, 20:30 UTCMay 24, 21:45 UTC1h 15m
2026-05-24 QLK1846 BNE → BNE May 24, 05:45 UTCMay 24, 08:20 UTC2h 35m
2026-05-23 QLK1895 BNE → BNE May 23, 23:25 UTCMay 24, 04:45 UTC5h 20m
2026-05-23 QLK1866 BNE → BNE May 23, 04:50 UTCMay 23, 21:40 UTC16h 51m
2026-05-23 QLK1844 BNE → BNE May 23, 00:45 UTCMay 23, 03:45 UTC2h 59m
2026-05-22 QLK1848 BNE → BNE May 22, 07:15 UTCMay 22, 21:35 UTC14h 20m
2026-05-21 QLK1820 BNE → BNE May 21, 19:45 UTCMay 22, 05:55 UTC10h 10m
2026-05-21 QLK1986 - May 21, 09:35 UTCMay 21, 10:40 UTC1h 5m
2026-05-21 QLK1985 - May 21, 07:45 UTCMay 21, 08:45 UTC1h 0m
2026-05-21 QLK1827 BNE → BNE May 21, 03:15 UTCMay 21, 06:40 UTC3h 25m
2026-05-20 QLK1822 BNE → BNE May 20, 22:25 UTCMay 21, 02:00 UTC3h 35m
2026-05-20 QLK6291 - May 20, 10:00 UTCMay 20, 10:35 UTC35m
2026-05-12 QLK1848 - May 12, 07:20 UTCMay 12, 07:55 UTC35m
2026-05-12 QLK1928 BNE → BNE May 12, 03:10 UTCMay 12, 06:00 UTC2h 50m
2026-05-07 QLK1917 BNE → BNE May 7, 22:50 UTCMay 8, 01:35 UTC2h 45m
2026-05-06 QLK1800 ADL → BNE May 6, 21:45 UTCMay 6, 23:50 UTC2h 5m
2026-05-06 QLK1811 BNE → ADL May 6, 08:55 UTCMay 6, 11:20 UTC2h 25m
2026-05-06 QLK1806 ADL → BNE May 6, 03:55 UTCMay 6, 06:15 UTC2h 20m
2026-05-06 QLK1791 MEL → ADL May 6, 00:10 UTCMay 6, 01:15 UTC1h 5m
2026-05-05 QLK1790 ADL → MEL May 5, 21:45 UTCMay 5, 22:50 UTC1h 5m
2026-05-04 QLK1816 ADL → ADL May 4, 22:25 UTCMay 5, 02:55 UTC4h 30m
2026-05-03 QLK1816 ADL → ADL May 3, 22:30 UTCMay 4, 03:00 UTC4h 30m
2026-05-03 QLK1811 BNE → ADL May 3, 09:15 UTCMay 3, 11:50 UTC2h 35m
2026-05-02 QLK1891 - May 2, 21:25 UTCMay 2, 22:05 UTC40m
2026-05-01 QLK1890 - May 1, 10:45 UTCMay 1, 11:20 UTC35m
2026-04-30 QLK1956 - Apr 30, 08:55 UTCApr 30, 10:25 UTC1h 30m
2026-04-30 QLK1955 - Apr 30, 06:35 UTCApr 30, 07:55 UTC1h 20m
2026-04-30 QLK1984 - Apr 30, 04:30 UTCApr 30, 05:35 UTC1h 5m
2026-04-30 QLK1983 - Apr 30, 02:35 UTCApr 30, 03:35 UTC1h 0m
2026-04-30 QLK1982 - Apr 30, 00:10 UTCApr 30, 01:15 UTC1h 5m
2026-04-29 QLK1981 - Apr 29, 22:25 UTCApr 29, 23:25 UTC59m
2026-04-29 QLK1984 - Apr 29, 04:39 UTCApr 29, 05:45 UTC1h 5m
2026-04-29 QLK1983 - Apr 29, 02:35 UTCApr 29, 03:34 UTC1h 0m
2026-04-28 QLK1918 BNE → BNE Apr 28, 22:45 UTCApr 29, 01:15 UTC2h 30m
2026-04-28 QLK1848 BNE → BNE Apr 28, 07:10 UTCApr 28, 21:35 UTC14h 25m
2026-04-28 QLK1984 - Apr 28, 04:30 UTCApr 28, 05:35 UTC1h 5m
2026-04-28 QLK1983 - Apr 28, 02:40 UTCApr 28, 03:35 UTC55m

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 7h ago.
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, QLK1848, QLK1981.