Apparatus

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sensors Mode-S transponder

7C68AA

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C68AA
Octal
37064252
Decimal
8,153,258
Country
AU
Tail
VH-UYK
Type
E190
Broadcasting now · callsign QLK1811 · 5,800 ft
Flights observed
320
Distinct callsigns
20
Country
AU
Last broadcast
2h ago

Current position

7C68AA is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 7C68AA 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 - 9 2026-07-10
QLK1804 - 9 2026-07-08
QLK1972 - 8 2026-07-05
QLK1944 - 8 2026-07-07
QLK1988 - 7 2026-06-25
QLK1983 - 7 2026-06-28
QLK1955 - 7 2026-06-08
QLK1943 - 7 2026-07-07
QLK1822 - 7 2026-06-29
QLK1803 - 7 2026-07-08
QLK1986 - 6 2026-06-26
QLK1985 - 6 2026-06-26
QLK1981 - 6 2026-06-27
QLK1848 - 6 2026-06-28
QLK1826 - 6 2026-06-26
QLK1806 - 6 2026-07-14
QLK1998 - 5 2026-07-09
QLK1984 - 5 2026-06-28
QLK1982 - 5 2026-06-28
QLK1908 - 5 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 QLK1806 ADL → BNE Jul 14, 04:05 UTCJul 14, 06:10 UTC2h 5m
2026-07-13 QLK1816 ADL → ADL Jul 13, 22:20 UTCJul 14, 03:05 UTC4h 45m
2026-07-13 QLK1811 BNE → ADL Jul 13, 09:00 UTCJul 13, 11:25 UTC2h 25m
2026-07-13 QLK1806 ADL → BNE Jul 13, 04:20 UTCJul 13, 06:30 UTC2h 10m
2026-07-12 QLK1816 ADL → ADL Jul 12, 22:50 UTCJul 13, 03:25 UTC4h 35m
2026-07-12 QLK1811 BNE → ADL Jul 12, 09:10 UTCJul 12, 11:35 UTC2h 25m
2026-07-12 QLK1884 BNE → BNE Jul 12, 02:50 UTCJul 12, 07:55 UTC5h 5m
2026-07-12 QLK1843 - Jul 12, 01:10 UTCJul 12, 01:40 UTC30m
2026-07-11 QLK1876 - Jul 11, 22:45 UTCJul 11, 23:25 UTC40m
2026-07-11 QLK1846 BNE → BNE Jul 11, 05:20 UTCJul 11, 08:10 UTC2h 50m
2026-07-10 QLK1971 BNE → BNE Jul 10, 23:50 UTCJul 11, 04:10 UTC4h 20m
2026-07-10 QLK1890 BNE → BNE Jul 10, 10:30 UTCJul 10, 21:50 UTC11h 21m
2026-07-10 QLK1808 ADL → BNE Jul 10, 06:40 UTCJul 10, 08:45 UTC2h 5m
2026-07-10 QLK1909 - Jul 10, 01:45 UTCJul 10, 03:45 UTC2h 0m
2026-07-09 QLK1997 - Jul 9, 23:20 UTCJul 10, 00:40 UTC1h 20m
2026-07-09 QLK1996 - Jul 9, 20:35 UTCJul 9, 22:05 UTC1h 30m
2026-07-09 QLK1999 - Jul 9, 09:30 UTCJul 9, 10:50 UTC1h 20m
2026-07-09 QLK1998 - Jul 9, 06:30 UTCJul 9, 07:45 UTC1h 15m
2026-07-09 QLK1908 - Jul 9, 03:45 UTCJul 9, 05:30 UTC1h 45m
2026-07-08 QLK1803 BNE → ADL Jul 8, 23:15 UTCJul 9, 01:50 UTC2h 35m
2026-07-08 QLK1868 BNE → BNE Jul 8, 06:10 UTCJul 8, 21:30 UTC15h 20m
2026-07-08 QLK1804 ADL → BNE Jul 8, 02:40 UTCJul 8, 04:45 UTC2h 5m
2026-07-07 QLK1803 BNE → ADL Jul 7, 23:15 UTCJul 8, 01:35 UTC2h 20m
2026-07-07 QLK1944 SYD → BNE Jul 7, 09:10 UTCJul 7, 21:55 UTC12h 45m
2026-07-07 QLK1943 MEL → SYD Jul 7, 01:55 UTCJul 7, 07:55 UTC6h 0m
2026-07-06 QLK1941 - Jul 6, 06:35 UTCJul 7, 00:40 UTC18h 5m
2026-07-06 QLK1868 BNE → MEL Jul 6, 06:10 UTCJul 7, 00:40 UTC18h 30m
2026-07-06 QLK1825 - Jul 6, 03:10 UTCJul 6, 04:20 UTC1h 10m
2026-07-06 QLK1824 - Jul 6, 00:50 UTCJul 6, 02:15 UTC1h 25m
2026-07-05 QLK1840 BNE → BNE Jul 5, 20:55 UTCJul 5, 23:40 UTC2h 45m
2026-07-05 QLK1954 - Jul 5, 07:50 UTCJul 5, 09:20 UTC1h 30m
2026-07-05 QLK1953 - Jul 5, 05:25 UTCJul 5, 06:50 UTC1h 25m
2026-07-05 QLK1972 ABX → BNE Jul 5, 02:25 UTCJul 5, 04:05 UTC1h 40m
2026-07-04 QLK1971 BNE → ABX Jul 4, 23:50 UTCJul 5, 01:35 UTC1h 45m
2026-07-04 QLK1866 BNE → BNE Jul 4, 04:50 UTCJul 4, 09:15 UTC4h 25m
2026-07-04 QLK1844 BNE → BNE Jul 4, 00:40 UTCJul 4, 03:35 UTC2h 55m
2026-07-03 QLK1800 ADL → BNE Jul 3, 21:20 UTCJul 3, 23:30 UTC2h 10m
2026-07-03 QLK1905 - Jul 3, 09:25 UTCJul 3, 09:55 UTC30m
2026-07-03 QLK1906 - Jul 3, 01:50 UTCJul 3, 02:20 UTC30m
2026-07-02 QLK6283 BNE → ADL Jul 2, 05:30 UTCJul 2, 08:20 UTC2h 50m
2026-06-30 QLK1872 BNE → BNE Jun 30, 20:05 UTCJul 1, 00:25 UTC4h 20m
2026-06-30 QLK1831 - Jun 30, 09:45 UTCJun 30, 10:50 UTC1h 5m
2026-06-30 QLK1830 - Jun 30, 07:40 UTCJun 30, 09:00 UTC1h 20m
2026-06-30 QLK1928 BNE → BNE Jun 30, 02:55 UTCJun 30, 05:50 UTC2h 55m
2026-06-30 QLK1823 - Jun 30, 00:39 UTCJun 30, 01:45 UTC1h 6m
2026-06-29 QLK1822 - Jun 29, 22:30 UTCJun 29, 23:54 UTC1h 25m
2026-06-29 QLK1833 - Jun 29, 20:09 UTCJun 29, 21:14 UTC1h 5m
2026-06-29 QLK1832 - Jun 29, 09:54 UTCJun 29, 11:25 UTC1h 30m
2026-06-29 QLK1829 - Jun 29, 07:30 UTCJun 29, 08:35 UTC1h 5m
2026-06-29 QLK1828 - Jun 29, 05:15 UTCJun 29, 06:40 UTC1h 25m

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

Mode-S 7C68AA frequently asked

What is Mode-S code 7C68AA?
7C68AA is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-UYK.
Where is Mode-S 7C68AA registered?
Mode-S code 7C68AA is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C68AA broadcasting right now?
Yes. Mode-S 7C68AA is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C68AA, octal 37064252, decimal 8,153,258.
What flights does 7C68AA operate?
Mode-S 7C68AA has broadcast 20 distinct callsigns, including QLK1971, QLK1804, QLK1972, QLK1944, QLK1988.