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 12h ago
Flights observed
165
Distinct callsigns
18
Country
AU
Last broadcast
12h 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 18 distinct

Callsign Airline Flights Last seen
QFA7523 Qantas 15 2026-06-22
QFA7353 - 14 2026-07-08
QFA7335 - 14 2026-07-09
QFA7332 - 14 2026-07-08
QFA7398 Qantas 13 2026-07-08
QFA7354 - 12 2026-07-13
QFA7340 Qantas 12 2026-07-13
QFA7356 - 10 2026-07-09
QFA7396 - 9 2026-07-13
QFA7365 - 9 2026-07-01
QFA7305 - 9 2026-07-01
QFA7524 - 8 2026-06-22
QFA7350 - 8 2026-07-01
QFA7313 Qantas 6 2026-06-08
QFA7390 - 5 2026-07-02
QFA7330 - 5 2026-07-02
QFA7370 - 1 2026-07-09
QFA7341 - 1 2026-06-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 QFA7396 - Jul 13, 15:05 UTCJul 13, 20:05 UTC5h 0m
2026-07-13 QFA7340 SYD → BNE Jul 13, 12:35 UTCJul 13, 13:50 UTC1h 15m
2026-07-13 QFA7354 MEL → SYD Jul 13, 10:10 UTCJul 13, 11:15 UTC1h 5m
2026-07-09 QFA7370 - Jul 9, 20:00 UTCJul 9, 20:45 UTC45m
2026-07-09 QFA7356 - Jul 9, 16:45 UTCJul 9, 17:20 UTC35m
2026-07-09 QFA7335 BNE → MEL Jul 9, 12:45 UTCJul 9, 14:40 UTC1h 55m
2026-07-08 QFA7332 BNE → BNE Jul 8, 19:00 UTCJul 9, 11:05 UTC16h 5m
2026-07-08 QFA7353 MEL → BNE Jul 8, 16:00 UTCJul 8, 17:50 UTC1h 50m
2026-07-08 QFA7398 PER → MEL Jul 8, 11:25 UTCJul 8, 14:35 UTC3h 10m
2026-07-07 QFA7396 BNE → PER Jul 7, 15:25 UTCJul 7, 20:30 UTC5h 5m
2026-07-07 QFA7340 SYD → BNE Jul 7, 12:45 UTCJul 7, 13:50 UTC1h 5m
2026-07-07 QFA7354 MEL → SYD Jul 7, 10:25 UTCJul 7, 11:30 UTC1h 5m
2026-07-06 QFA7398 PER → MEL Jul 6, 11:25 UTCJul 6, 14:50 UTC3h 25m
2026-07-02 QFA7390 MEL → PER Jul 2, 17:55 UTCJul 2, 21:40 UTC3h 45m
2026-07-02 QFA7330 - Jul 2, 15:00 UTCJul 2, 17:10 UTC2h 10m
2026-07-02 QFA7340 SYD → BNE Jul 2, 12:40 UTCJul 2, 13:55 UTC1h 15m
2026-07-02 QFA7354 MEL → SYD Jul 2, 10:25 UTCJul 2, 11:20 UTC55m
2026-07-01 QFA7305 BNE → MEL Jul 1, 16:20 UTCJul 1, 18:25 UTC2h 5m
2026-07-01 QFA7350 MEL → BNE Jul 1, 13:15 UTCJul 1, 15:10 UTC1h 55m
2026-07-01 QFA7365 - Jul 1, 11:15 UTCJul 1, 12:00 UTC45m
2026-06-30 QFA7356 - Jun 30, 16:40 UTCJun 30, 17:15 UTC35m
2026-06-30 QFA7335 BNE → MEL Jun 30, 12:15 UTCJun 30, 14:30 UTC2h 15m
2026-06-29 QFA7332 BNE → BNE Jun 29, 19:35 UTCJun 30, 11:00 UTC15h 26m
2026-06-29 QFA7353 MEL → BNE Jun 29, 16:04 UTCJun 29, 17:59 UTC1h 55m
2026-06-29 QFA7398 PER → MEL Jun 29, 11:29 UTCJun 29, 14:39 UTC3h 10m
2026-06-25 QFA7396 BNE → PER Jun 25, 15:10 UTCJun 25, 20:25 UTC5h 15m
2026-06-25 QFA7340 SYD → BNE Jun 25, 12:50 UTCJun 25, 13:59 UTC1h 10m
2026-06-25 QFA7354 MEL → SYD Jun 25, 10:25 UTCJun 25, 11:35 UTC1h 10m
2026-06-24 QFA7398 PER → MEL Jun 24, 11:24 UTCJun 24, 14:55 UTC3h 30m
2026-06-23 QFA7390 MEL → PER Jun 23, 18:45 UTCJun 23, 22:19 UTC3h 35m
2026-06-23 QFA7330 BNE → MEL Jun 23, 15:19 UTCJun 23, 17:39 UTC2h 20m
2026-06-23 QFA7341 SYD → BNE Jun 23, 12:55 UTCJun 23, 14:10 UTC1h 15m
2026-06-22 QFA7524 - Jun 22, 19:40 UTCJun 22, 22:44 UTC3h 5m
2026-06-22 QFA7523 SYD → AKL Jun 22, 16:29 UTCJun 22, 17:40 UTC1h 10m
2026-06-22 QFA7523 SYD → AKL Jun 22, 12:30 UTCJun 22, 15:05 UTC2h 35m
2026-06-20 QFA7524 - Jun 20, 17:49 UTCJun 20, 21:14 UTC3h 25m
2026-06-20 QFA7523 SYD → AKL Jun 20, 15:34 UTCJun 20, 16:39 UTC1h 5m
2026-06-20 QFA7523 SYD → AKL Jun 20, 11:14 UTCJun 20, 13:29 UTC2h 15m
2026-06-18 QFA7524 - Jun 18, 16:50 UTCJun 18, 20:20 UTC3h 30m
2026-06-18 QFA7523 SYD → AKL Jun 18, 12:05 UTCJun 18, 14:40 UTC2h 35m
2026-06-17 QFA7524 - Jun 17, 18:30 UTCJun 17, 21:35 UTC3h 5m
2026-06-17 QFA7523 SYD → AKL Jun 17, 16:20 UTCJun 17, 17:30 UTC1h 10m
2026-06-17 QFA7523 SYD → AKL Jun 17, 12:15 UTCJun 17, 14:55 UTC2h 40m
2026-06-16 QFA7524 CHC → SYD Jun 16, 18:29 UTCJun 16, 21:25 UTC2h 56m
2026-06-16 QFA7523 SYD → AKL Jun 16, 16:20 UTCJun 16, 17:24 UTC1h 5m
2026-06-16 QFA7523 SYD → AKL Jun 16, 12:35 UTCJun 16, 15:15 UTC2h 40m
2026-06-15 QFA7524 - Jun 15, 18:40 UTCJun 15, 21:30 UTC2h 50m
2026-06-15 QFA7523 SYD → AKL Jun 15, 16:24 UTCJun 15, 17:25 UTC1h 0m
2026-06-15 QFA7523 SYD → AKL Jun 15, 12:19 UTCJun 15, 15:00 UTC2h 40m
2026-06-13 QFA7524 AKL → CHC Jun 13, 17:10 UTCJun 13, 20:15 UTC3h 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-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 12h 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 18 distinct callsigns, including QFA7523, QFA7353, QFA7335, QFA7332, QFA7398.