Apparatus

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sensors Mode-S transponder

7C66E2

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-ULW · AIRBUS A-321 · operated by EXPRESS FREIGHTERS AUSTRALIA PTY LIMITED

Hex
7C66E2
Octal
37063342
Decimal
8,152,802
Country
AU
Tail
VH-ULW
Type
A321
No current signal · last broadcast 1d ago
Flights observed
92
Distinct callsigns
14
Country
AU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 7C66E2.

Country allocation

The ICAO 24-bit address 7C66E2 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 14 distinct

Callsign Airline Flights Last seen
QFA7353 Qantas 11 2026-05-28
QFA7332 Qantas 11 2026-05-28
QFA7335 Qantas 10 2026-05-28
QFA7305 Qantas 8 2026-05-20
QFA7398 Qantas 7 2026-05-25
QFA7354 Qantas 7 2026-05-21
QFA7340 Qantas 7 2026-05-21
QFA7365 Qantas 6 2026-05-20
QFA7356 Qantas 6 2026-05-19
QFA7350 Qantas 6 2026-05-20
QFA7396 Qantas 5 2026-05-21
QFA7313 Qantas 4 2026-05-28
QFA7390 Qantas 2 2026-05-18
QFA7330 Qantas 2 2026-05-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-28 QFA7332 BNE → TSV May 28, 19:45 UTCMay 28, 21:05 UTC1h 20m
2026-05-28 QFA7353 MEL → BNE May 28, 16:45 UTCMay 28, 18:35 UTC1h 50m
2026-05-28 QFA7335 BNE → MEL May 28, 13:45 UTCMay 28, 15:40 UTC1h 55m
2026-05-28 QFA7313 CNS → BNE May 28, 10:50 UTCMay 28, 11:20 UTC30m
2026-05-28 QFA7313 CNS → BNE May 28, 10:05 UTCMay 28, 10:25 UTC20m
2026-05-27 QFA7332 BNE → TSV May 27, 19:30 UTCMay 27, 21:00 UTC1h 30m
2026-05-27 QFA7353 MEL → BNE May 27, 16:20 UTCMay 27, 18:20 UTC2h 0m
2026-05-27 QFA7335 BNE → MEL May 27, 12:25 UTCMay 27, 14:20 UTC1h 55m
2026-05-26 QFA7332 BNE → TSV May 26, 20:05 UTCMay 27, 11:05 UTC15h 1m
2026-05-26 QFA7353 MEL → BNE May 26, 16:30 UTCMay 26, 18:40 UTC2h 10m
2026-05-26 QFA7335 BNE → MEL May 26, 12:30 UTCMay 26, 14:20 UTC1h 50m
2026-05-25 QFA7332 BNE → TSV May 25, 19:20 UTCMay 26, 11:09 UTC15h 50m
2026-05-25 QFA7353 MEL → BNE May 25, 16:00 UTCMay 25, 18:05 UTC2h 5m
2026-05-25 QFA7398 PER → MEL May 25, 11:20 UTCMay 25, 15:00 UTC3h 40m
2026-05-21 QFA7396 BNE → PER May 21, 15:30 UTCMay 21, 20:35 UTC5h 5m
2026-05-21 QFA7340 SYD → BNE May 21, 13:05 UTCMay 21, 14:10 UTC1h 5m
2026-05-21 QFA7354 MEL → SYD May 21, 10:25 UTCMay 21, 11:30 UTC1h 5m
2026-05-20 QFA7305 BNE → MEL May 20, 16:40 UTCMay 20, 18:45 UTC2h 5m
2026-05-20 QFA7350 MEL → BNE May 20, 13:25 UTCMay 20, 15:10 UTC1h 45m
2026-05-20 QFA7365 LST → MEL May 20, 11:25 UTCMay 20, 12:00 UTC35m
2026-05-19 QFA7356 MEL → LST May 19, 16:45 UTCMay 19, 17:20 UTC35m
2026-05-19 QFA7398 PER → MEL May 19, 11:30 UTCMay 19, 14:50 UTC3h 20m
2026-05-18 QFA7390 PER → MEL May 18, 18:00 UTCMay 18, 21:45 UTC3h 44m
2026-05-18 QFA7330 BNE → MEL May 18, 15:20 UTCMay 18, 17:15 UTC1h 55m
2026-05-18 QFA7340 SYD → BNE May 18, 12:50 UTCMay 18, 14:00 UTC1h 10m
2026-05-18 QFA7354 MEL → SYD May 18, 10:25 UTCMay 18, 11:30 UTC1h 5m
2026-05-14 QFA7305 BNE → MEL May 14, 16:20 UTCMay 14, 18:15 UTC1h 55m
2026-05-14 QFA7350 MEL → BNE May 14, 13:10 UTCMay 14, 15:05 UTC1h 55m
2026-05-14 QFA7365 LST → MEL May 14, 11:20 UTCMay 14, 11:55 UTC35m
2026-05-13 QFA7356 MEL → LST May 13, 16:50 UTCMay 13, 17:20 UTC30m
2026-05-13 QFA7335 BNE → MEL May 13, 12:15 UTCMay 13, 14:10 UTC1h 55m
2026-05-12 QFA7332 BNE → TSV May 12, 19:30 UTCMay 13, 11:00 UTC15h 30m
2026-05-12 QFA7353 MEL → BNE May 12, 16:05 UTCMay 12, 18:00 UTC1h 55m
2026-05-12 QFA7398 PER → MEL May 12, 11:30 UTCMay 12, 14:55 UTC3h 25m
2026-05-11 QFA7390 PER → MEL May 11, 18:00 UTCMay 11, 21:35 UTC3h 35m
2026-05-11 QFA7330 BNE → MEL May 11, 15:15 UTCMay 11, 17:05 UTC1h 51m
2026-05-11 QFA7340 SYD → BNE May 11, 12:45 UTCMay 11, 13:55 UTC1h 10m
2026-05-11 QFA7354 MEL → SYD May 11, 10:20 UTCMay 11, 11:30 UTC1h 10m
2026-05-07 QFA7305 BNE → MEL May 7, 18:00 UTCMay 7, 18:40 UTC40m
2026-05-07 QFA7305 BNE → MEL May 7, 16:35 UTCMay 7, 17:55 UTC1h 20m
2026-05-07 QFA7350 MEL → BNE May 7, 13:30 UTCMay 7, 15:20 UTC1h 50m
2026-05-07 QFA7365 LST → MEL May 7, 11:45 UTCMay 7, 12:20 UTC35m
2026-05-06 QFA7356 MEL → LST May 6, 17:05 UTCMay 6, 17:35 UTC29m
2026-05-06 QFA7335 BNE → MEL May 6, 12:35 UTCMay 6, 14:35 UTC2h 0m
2026-05-05 QFA7332 BNE → TSV May 5, 19:25 UTCMay 6, 11:15 UTC15h 50m
2026-05-05 QFA7353 MEL → BNE May 5, 16:15 UTCMay 5, 18:10 UTC1h 55m
2026-05-05 QFA7335 BNE → MEL May 5, 12:30 UTCMay 5, 14:35 UTC2h 5m
2026-05-04 QFA7332 BNE → TSV May 4, 19:05 UTCMay 5, 11:20 UTC16h 15m
2026-05-04 QFA7353 MEL → BNE May 4, 16:00 UTCMay 4, 17:55 UTC1h 55m
2026-05-04 QFA7398 PER → MEL May 4, 11:30 UTCMay 4, 14:45 UTC3h 15m

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

Mode-S 7C66E2 frequently asked

What is Mode-S code 7C66E2?
7C66E2 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-ULW.
Where is Mode-S 7C66E2 registered?
Mode-S code 7C66E2 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C66E2 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C66E2, octal 37063342, decimal 8,152,802.
What flights does 7C66E2 operate?
Mode-S 7C66E2 has broadcast 14 distinct callsigns, including QFA7353, QFA7332, QFA7335, QFA7305, QFA7398.