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sensors Mode-S transponder

7C68A2

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C68A2
Octal
37064242
Decimal
8,153,250
Country
AU
Tail
VH-UYC
Type
E190
No current signal · last broadcast 23d ago
Flights observed
234
Distinct callsigns
20
Country
AU
Last broadcast
23d ago

Last known position

Most recent position reported by Mode-S 7C68A2.

Country allocation

The ICAO 24-bit address 7C68A2 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
QLK1823 - 7 2026-07-25
QLK1885 - 6 2026-06-27
QLK1983 - 5 2026-07-03
QLK1982 - 5 2026-07-19
QLK1981 - 5 2026-07-18
QLK1956 - 5 2026-07-26
QLK1955 - 5 2026-07-26
QLK1833 - 5 2026-07-15
QLK1830 - 5 2026-07-20
QLK1822 - 5 2026-07-24
QLK1990 - 4 2026-07-05
QLK1988 - 4 2026-07-24
QLK1984 - 4 2026-07-03
QLK1972 - 4 2026-06-28
QLK1971 - 4 2026-07-13
QLK1827 - 4 2026-07-20
QLK1821 - 4 2026-07-26
QLK1801 - 4 2026-07-06
QLK1999 - 3 2026-07-24
QLK1998 - 3 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QLK1945 - Jul 26, 20:30 UTCJul 26, 21:55 UTC1h 25m
2026-07-26 QLK1956 - Jul 26, 10:05 UTCJul 26, 11:35 UTC1h 30m
2026-07-26 QLK1955 - Jul 26, 07:40 UTCJul 26, 09:10 UTC1h 30m
2026-07-26 QLK1821 - Jul 26, 05:20 UTCJul 26, 06:30 UTC1h 10m
2026-07-25 QLK1828 - Jul 25, 05:05 UTCJul 25, 06:20 UTC1h 15m
2026-07-25 QLK1823 - Jul 25, 00:45 UTCJul 25, 01:55 UTC1h 10m
2026-07-24 QLK1822 - Jul 24, 22:30 UTCJul 24, 23:50 UTC1h 20m
2026-07-24 QLK1988 - Jul 24, 20:10 UTCJul 24, 21:10 UTC1h 0m
2026-07-24 QLK1999 - Jul 24, 09:20 UTCJul 24, 10:35 UTC1h 15m
2026-07-24 QLK1998 - Jul 24, 06:25 UTCJul 24, 07:55 UTC1h 30m
2026-07-24 QLK1908 - Jul 24, 03:40 UTCJul 24, 05:15 UTC1h 35m
2026-07-23 QLK1795 - Jul 23, 23:10 UTCJul 24, 00:45 UTC1h 35m
2026-07-23 QLK1794 - Jul 23, 20:50 UTCJul 23, 22:05 UTC1h 15m
2026-07-23 QLK1799 - Jul 23, 10:40 UTCJul 23, 11:25 UTC45m
2026-07-23 QLK1799 - Jul 23, 09:30 UTCJul 23, 09:50 UTC20m
2026-07-23 QLK1798 - Jul 23, 07:10 UTCJul 23, 08:25 UTC1h 15m
2026-07-23 QLK1797 - Jul 23, 04:20 UTCJul 23, 06:15 UTC1h 55m
2026-07-23 QLK1796 - Jul 23, 02:00 UTCJul 23, 03:10 UTC1h 10m
2026-07-22 QLK1993 SYD → ADL Jul 22, 22:35 UTCJul 23, 00:45 UTC2h 10m
2026-07-22 QLK1814 - Jul 22, 20:15 UTCJul 22, 20:50 UTC35m
2026-07-22 QLK1992 - Jul 22, 04:10 UTCJul 22, 05:25 UTC1h 15m
2026-07-22 QLK1805 BNE → ADL Jul 22, 00:30 UTCJul 22, 03:10 UTC2h 40m
2026-07-21 QLK1872 BNE → BNE Jul 21, 20:00 UTCJul 21, 23:15 UTC3h 15m
2026-07-21 QLK1956 - Jul 21, 08:55 UTCJul 21, 10:20 UTC1h 25m
2026-07-21 QLK1955 - Jul 21, 06:30 UTCJul 21, 08:00 UTC1h 30m
2026-07-21 QLK1825 - Jul 21, 03:05 UTCJul 21, 04:15 UTC1h 10m
2026-07-21 QLK1824 - Jul 21, 01:00 UTCJul 21, 02:15 UTC1h 15m
2026-07-20 QLK1840 BNE → BNE Jul 20, 21:00 UTCJul 20, 23:35 UTC2h 35m
2026-07-20 QLK1831 - Jul 20, 09:45 UTCJul 20, 10:50 UTC1h 5m
2026-07-20 QLK1830 - Jul 20, 07:45 UTCJul 20, 09:00 UTC1h 15m
2026-07-20 QLK1827 - Jul 20, 05:15 UTCJul 20, 06:30 UTC1h 15m
2026-07-20 QLK1826 - Jul 20, 03:05 UTCJul 20, 04:20 UTC1h 15m
2026-07-20 QLK1823 - Jul 20, 00:55 UTCJul 20, 02:05 UTC1h 10m
2026-07-19 QLK1822 - Jul 19, 22:40 UTCJul 19, 23:55 UTC1h 15m
2026-07-19 QLK1988 - Jul 19, 20:10 UTCJul 19, 21:10 UTC1h 0m
2026-07-19 QLK1987 - Jul 19, 09:40 UTCJul 19, 10:40 UTC1h 0m
2026-07-19 QLK1884 BNE → BNE Jul 19, 02:50 UTCJul 19, 07:55 UTC5h 5m
2026-07-19 QLK1982 - Jul 19, 00:05 UTCJul 19, 01:10 UTC1h 5m
2026-07-18 QLK1981 - Jul 18, 22:15 UTCJul 18, 23:15 UTC1h 0m
2026-07-18 QLK1874 BNE → BNE Jul 18, 02:25 UTCJul 18, 08:45 UTC6h 21m
2026-07-17 QLK1870 BNE → BNE Jul 17, 09:30 UTCJul 17, 21:50 UTC12h 20m
2026-07-17 QLK1952 - Jul 17, 06:15 UTCJul 17, 07:50 UTC1h 35m
2026-07-17 QLK1951 - Jul 17, 03:59 UTCJul 17, 05:25 UTC1h 25m
2026-07-17 QLK1948 - Jul 17, 01:09 UTCJul 17, 02:34 UTC1h 25m
2026-07-16 QLK1947 - Jul 16, 22:49 UTCJul 17, 00:14 UTC1h 25m
2026-07-16 QLK1848 BNE → BNE Jul 16, 07:15 UTCJul 16, 21:45 UTC14h 30m
2026-07-16 QLK1928 BNE → BNE Jul 16, 03:15 UTCJul 16, 06:20 UTC3h 5m
2026-07-16 QLK1917 - Jul 16, 00:45 UTCJul 16, 01:25 UTC40m
2026-07-15 QLK1918 - Jul 15, 22:45 UTCJul 15, 23:20 UTC35m
2026-07-15 QLK1833 - Jul 15, 20:20 UTCJul 15, 21:30 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-UYC page for operator, model, and routing details .

Mode-S 7C68A2 frequently asked

What is Mode-S code 7C68A2?
7C68A2 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-UYC.
Where is Mode-S 7C68A2 registered?
Mode-S code 7C68A2 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C68A2 broadcasting right now?
No active broadcast right now. Last signal was 23d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C68A2, octal 37064242, decimal 8,153,250.
What flights does 7C68A2 operate?
Mode-S 7C68A2 has broadcast 20 distinct callsigns, including QLK1823, QLK1885, QLK1983, QLK1982, QLK1981.