sensors Mode-S transponder

7C68A9

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C68A9
Octal
37064251
Decimal
8,153,257
Country
AU
Tail
VH-UYJ
Type
E190
No current signal · last broadcast 18h ago
Flights observed
134
Distinct callsigns
20
Country
AU
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S 7C68A9.

Country allocation

The ICAO 24-bit address 7C68A9 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
QLK1885 - 7 2026-06-04
QLK1830 - 4 2026-05-29
QLK1809 - 4 2026-06-04
QLK1800 - 4 2026-05-13
QLK1928 - 3 2026-06-02
QLK1888 - 3 2026-06-03
QLK1871 - 3 2026-06-01
QLK1846 - 3 2026-05-11
QLK1824 - 3 2026-05-20
QLK1823 - 3 2026-05-30
QLK1822 - 3 2026-05-29
QLK1806 - 3 2026-05-14
QLK1805 - 3 2026-05-14
QLK1799 - 3 2026-05-05
UTY2607 - 2 2026-04-24
QLK1982 - 2 2026-05-28
QLK1981 - 2 2026-05-27
QLK1956 - 2 2026-05-15
QLK1955 - 2 2026-05-15
QLK1924 - 2 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-09 QLK1804 ADL → BNE Jun 9, 02:40 UTCJun 9, 04:45 UTC2h 5m
2026-06-08 QLK1907 - Jun 8, 23:40 UTCJun 9, 00:10 UTC30m
2026-06-08 QLK1853 - Jun 8, 04:05 UTCJun 8, 04:15 UTC10m
2026-06-08 QLK1959 - Jun 8, 02:05 UTCJun 8, 02:15 UTC10m
2026-06-04 QLK1904 - Jun 4, 22:45 UTCJun 4, 23:20 UTC35m
2026-06-04 QLK1809 BNE → ADL Jun 4, 07:10 UTCJun 4, 09:50 UTC2h 40m
2026-06-04 QLK1885 - Jun 4, 04:35 UTCJun 4, 05:50 UTC1h 15m
2026-06-03 QLK1888 - Jun 3, 07:10 UTCJun 3, 08:40 UTC1h 30m
2026-06-03 QLK1885 - Jun 3, 05:20 UTCJun 3, 05:55 UTC35m
2026-06-03 QLK1885 - Jun 3, 04:35 UTCJun 3, 04:55 UTC20m
2026-06-02 QLK1888 - Jun 2, 07:05 UTCJun 2, 08:35 UTC1h 30m
2026-06-02 QLK1928 BNE → BNE Jun 2, 02:55 UTCJun 2, 05:55 UTC3h 0m
2026-06-02 QLK1917 - Jun 2, 00:40 UTCJun 2, 01:20 UTC40m
2026-06-01 QLK1918 - Jun 1, 22:40 UTCJun 1, 23:10 UTC30m
2026-06-01 QLK1871 - Jun 1, 02:20 UTCJun 1, 21:45 UTC19h 25m
2026-06-01 QLK1871 MEL → BNE Jun 1, 02:00 UTCJun 1, 21:45 UTC19h 45m
2026-05-31 QLK1870 BNE → MEL May 31, 09:35 UTCJun 1, 00:25 UTC14h 50m
2026-05-30 QLK1965 - May 30, 22:00 UTCMay 30, 23:30 UTC1h 30m
2026-05-30 QLK1827 - May 30, 05:30 UTCMay 30, 06:45 UTC1h 15m
2026-05-30 QLK1826 - May 30, 03:20 UTCMay 30, 04:35 UTC1h 15m
2026-05-30 QLK1823 - May 30, 00:45 UTCMay 30, 01:55 UTC1h 10m
2026-05-29 QLK1822 - May 29, 22:30 UTCMay 29, 23:55 UTC1h 25m
2026-05-29 QLK1833 - May 29, 20:10 UTCMay 29, 21:20 UTC1h 10m
2026-05-29 QLK1830 BNE → MKY May 29, 07:30 UTCMay 29, 08:50 UTC1h 20m
2026-05-29 QLK1885 - May 29, 04:50 UTCMay 29, 06:10 UTC1h 20m
2026-05-28 QLK1890 - May 28, 10:40 UTCMay 28, 12:15 UTC1h 35m
2026-05-28 QLK1899 - May 28, 06:15 UTCMay 28, 07:25 UTC1h 10m
2026-05-28 QLK1898 BNE → LDC May 28, 03:55 UTCMay 28, 05:25 UTC1h 30m
2026-05-28 QLK1982 - May 28, 00:45 UTCMay 28, 02:00 UTC1h 15m
2026-05-27 QLK1981 - May 27, 23:00 UTCMay 27, 23:55 UTC55m
2026-05-27 QLK1990 BNE → BNE May 27, 04:49 UTCMay 27, 09:50 UTC5h 0m
2026-05-27 QLK1823 - May 27, 01:44 UTCMay 27, 02:54 UTC1h 10m
2026-05-26 QLK1822 - May 26, 23:29 UTCMay 27, 01:09 UTC1h 40m
2026-05-26 QLK1988 - May 26, 20:50 UTCMay 26, 22:05 UTC1h 15m
2026-05-26 QLK1999 - May 26, 09:19 UTCMay 26, 10:44 UTC1h 25m
2026-05-26 QLK1998 NTL → MEL May 26, 06:34 UTCMay 26, 07:55 UTC1h 20m
2026-05-25 QLK1997 - May 25, 23:14 UTCMay 26, 00:39 UTC1h 25m
2026-05-25 QLK1996 - May 25, 20:55 UTCMay 25, 22:15 UTC1h 20m
2026-05-25 QLK1987 - May 25, 09:40 UTCMay 25, 10:35 UTC55m
2026-05-25 QLK1930 BNE → BNE May 25, 05:15 UTCMay 25, 08:00 UTC2h 45m
2026-05-25 QLK1948 - May 25, 01:55 UTCMay 25, 02:30 UTC35m
2026-05-24 QLK1947 - May 24, 23:00 UTCMay 24, 23:46 UTC46m
2026-05-24 QLK1848 BNE → BNE May 24, 07:30 UTCMay 24, 21:35 UTC14h 5m
2026-05-24 QLK1885 - May 24, 04:55 UTCMay 24, 06:10 UTC1h 15m
2026-05-23 QLK1885 - May 23, 08:20 UTCMay 24, 06:10 UTC21h 51m
2026-05-23 QLK1888 BNE → BNE May 23, 07:10 UTCMay 24, 06:10 UTC23h 1m
2026-05-22 QLK1885 - May 22, 10:30 UTCMay 23, 06:00 UTC19h 29m
2026-05-22 QLK1954 - May 22, 07:55 UTCMay 22, 09:25 UTC1h 30m
2026-05-22 QLK1953 - May 22, 05:25 UTCMay 22, 06:55 UTC1h 30m
2026-05-21 QLK1924 BNE → BNE May 21, 22:30 UTCMay 22, 04:30 UTC6h 0m

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

Mode-S 7C68A9 frequently asked

What is Mode-S code 7C68A9?
7C68A9 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-UYJ.
Where is Mode-S 7C68A9 registered?
Mode-S code 7C68A9 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C68A9 broadcasting right now?
No active broadcast right now. Last signal was 18h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C68A9, octal 37064251, decimal 8,153,257.
What flights does 7C68A9 operate?
Mode-S 7C68A9 has broadcast 20 distinct callsigns, including QLK1885, QLK1830, QLK1809, QLK1800, QLK1928.