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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
Broadcasting now · callsign QLK1971 · 25,600 ft
Flights observed
303
Distinct callsigns
20
Country
AU
Last broadcast
2h ago

Current position

7C68A9 is currently broadcasting. Map zoomed to live position.

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
QLK1971 - 8 2026-07-18
QLK1885 - 7 2026-06-04
QLK1830 - 7 2026-07-09
QLK1820 - 7 2026-07-13
QLK1983 - 6 2026-07-24
QLK1954 - 6 2026-07-16
QLK1953 - 6 2026-07-16
QLK1890 - 6 2026-07-15
QLK1846 - 6 2026-07-17
QLK1824 - 6 2026-07-01
QLK1988 - 5 2026-07-17
QLK1984 - 5 2026-07-24
QLK1982 - 5 2026-07-24
QLK1981 - 5 2026-07-23
QLK1972 - 5 2026-07-16
QLK1956 - 5 2026-07-22
QLK1928 - 5 2026-07-23
QLK1918 - 5 2026-07-11
QLK1917 - 5 2026-07-12
QLK1821 - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-24 QLK1919 - Jul 24, 20:55 UTCJul 24, 21:25 UTC30m
2026-07-24 QLK1922 - Jul 24, 09:55 UTCJul 24, 10:30 UTC35m
2026-07-24 QLK1984 - Jul 24, 04:35 UTCJul 24, 05:40 UTC1h 5m
2026-07-24 QLK1983 - Jul 24, 02:35 UTCJul 24, 03:40 UTC1h 5m
2026-07-24 QLK1982 - Jul 24, 00:30 UTCJul 24, 01:40 UTC1h 10m
2026-07-23 QLK1981 - Jul 23, 22:35 UTCJul 23, 23:40 UTC1h 5m
2026-07-23 QLK1928 BNE → BNE Jul 23, 03:15 UTCJul 23, 06:05 UTC2h 50m
2026-07-23 QLK1946 - Jul 23, 00:20 UTCJul 23, 01:50 UTC1h 30m
2026-07-22 QLK1945 - Jul 22, 21:50 UTCJul 22, 23:20 UTC1h 30m
2026-07-22 QLK1956 - Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-22 QLK1950 - Jul 22, 04:10 UTCJul 22, 05:25 UTC1h 15m
2026-07-22 QLK1949 - Jul 22, 01:40 UTCJul 22, 03:05 UTC1h 25m
2026-07-21 QLK1840 BNE → BNE Jul 21, 21:05 UTCJul 21, 23:50 UTC2h 45m
2026-07-21 QLK1932 BNE → BNE Jul 21, 07:45 UTCJul 21, 10:45 UTC3h 0m
2026-07-21 QLK1802 ADL → BNE Jul 21, 02:55 UTCJul 21, 04:55 UTC2h 0m
2026-07-20 QLK1803 BNE → ADL Jul 20, 23:05 UTCJul 21, 01:55 UTC2h 49m
2026-07-20 QLK1944 SYD → BNE Jul 20, 08:40 UTCJul 20, 21:45 UTC13h 5m
2026-07-20 QLK1943 MEL → SYD Jul 20, 01:25 UTCJul 20, 07:25 UTC6h 0m
2026-07-19 QLK1870 BNE → MEL Jul 19, 09:35 UTCJul 20, 00:05 UTC14h 30m
2026-07-19 QLK1923 - Jul 19, 07:30 UTCJul 19, 08:10 UTC40m
2026-07-19 QLK1922 - Jul 19, 05:35 UTCJul 19, 06:05 UTC30m
2026-07-18 QLK1971 - Jul 18, 23:45 UTCJul 19, 04:00 UTC4h 15m
2026-07-18 QLK1990 BNE → BNE Jul 18, 04:30 UTCJul 18, 22:10 UTC17h 40m
2026-07-17 QLK1882 BNE → BNE Jul 17, 22:25 UTCJul 18, 03:25 UTC5h 1m
2026-07-17 QLK1988 - Jul 17, 20:10 UTCJul 17, 21:10 UTC1h 0m
2026-07-17 QLK1987 - Jul 17, 09:45 UTCJul 17, 10:44 UTC1h 0m
2026-07-17 QLK1846 BNE → BNE Jul 17, 05:15 UTCJul 17, 08:00 UTC2h 45m
2026-07-16 QLK1972 BNE → BNE Jul 16, 23:49 UTCJul 17, 04:10 UTC4h 20m
2026-07-16 QLK1954 - Jul 16, 07:45 UTCJul 16, 09:20 UTC1h 35m
2026-07-16 QLK1953 - Jul 16, 05:25 UTCJul 16, 06:55 UTC1h 30m
2026-07-15 QLK1971 BNE → BNE Jul 15, 23:55 UTCJul 16, 04:10 UTC4h 15m
2026-07-15 QLK1890 BNE → BNE Jul 15, 10:35 UTCJul 15, 22:35 UTC12h 0m
2026-07-15 QLK1846 BNE → BNE Jul 15, 05:25 UTCJul 15, 08:00 UTC2h 35m
2026-07-14 QLK1971 BNE → BNE Jul 14, 23:50 UTCJul 15, 04:15 UTC4h 25m
2026-07-14 QLK1833 - Jul 14, 20:05 UTCJul 14, 21:20 UTC1h 15m
2026-07-14 QLK1832 - Jul 14, 10:05 UTCJul 14, 11:30 UTC1h 25m
2026-07-14 QLK1829 - Jul 14, 07:20 UTCJul 14, 08:30 UTC1h 10m
2026-07-14 QLK1828 - Jul 14, 05:15 UTCJul 14, 06:35 UTC1h 20m
2026-07-14 QLK1844 - Jul 14, 01:05 UTCJul 14, 03:40 UTC2h 35m
2026-07-13 QLK1821 - Jul 13, 22:15 UTCJul 13, 23:20 UTC1h 5m
2026-07-13 QLK1820 BNE → MKY Jul 13, 19:45 UTCJul 13, 21:10 UTC1h 25m
2026-07-13 QLK1954 - Jul 13, 07:55 UTCJul 13, 09:25 UTC1h 30m
2026-07-13 QLK1953 - Jul 13, 05:25 UTCJul 13, 06:50 UTC1h 25m
2026-07-12 QLK1971 BNE → BNE Jul 12, 23:45 UTCJul 13, 04:10 UTC4h 25m
2026-07-12 QLK1890 BNE → BNE Jul 12, 10:30 UTCJul 12, 21:55 UTC11h 25m
2026-07-12 QLK1858 BNE → BNE Jul 12, 04:10 UTCJul 12, 09:20 UTC5h 10m
2026-07-12 QLK1917 - Jul 12, 01:45 UTCJul 12, 02:20 UTC35m
2026-07-11 QLK1918 - Jul 11, 23:55 UTCJul 12, 00:25 UTC30m
2026-07-11 QLK1988 - Jul 11, 20:10 UTCJul 11, 21:10 UTC1h 0m
2026-07-11 QLK1983 - Jul 11, 02:45 UTCJul 11, 03:50 UTC1h 5m

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?
Yes. Mode-S 7C68A9 is currently airborne.
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 QLK1971, QLK1885, QLK1830, QLK1820, QLK1983.