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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 Jul 26, 06:15 UTC
Flights observed
185
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 06:15 UTC

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 20 distinct

Callsign Airline Flights Last seen
QFA7523 Qantas 18 2026-07-25
QFA7353 - 16 2026-07-20
QFA7335 - 16 2026-07-21
QFA7398 - 15 2026-07-20
QFA7332 - 15 2026-07-20
QFA7354 Qantas 13 2026-07-23
QFA7340 Qantas 12 2026-07-13
QFA7356 - 11 2026-07-21
QFA7524 Qantas 10 2026-07-25
QFA7365 Qantas 10 2026-07-22
QFA7396 - 9 2026-07-13
QFA7305 - 9 2026-07-01
QFA7350 - 8 2026-07-01
QFA7313 - 7 2026-07-14
QFA7390 - 6 2026-07-16
QFA7330 - 6 2026-07-16
QFA7370 - 1 2026-07-09
QFA7355 - 1 2026-07-16
QFA7341 - 1 2026-06-23
QFA7303 Qantas 1 2026-07-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 QFA7303 MEL → BNE Jul 26, 05:45 UTCJul 26, 06:10 UTC25m
2026-07-25 QFA7524 AKL → CHC Jul 25, 17:20 UTCJul 25, 20:30 UTC3h 10m
2026-07-25 QFA7523 SYD → AKL Jul 25, 15:10 UTCJul 25, 16:20 UTC1h 10m
2026-07-25 QFA7523 SYD → AKL Jul 25, 11:25 UTCJul 25, 14:00 UTC2h 35m
2026-07-23 QFA7524 AKL → CHC Jul 23, 16:55 UTCJul 23, 20:25 UTC3h 30m
2026-07-23 QFA7523 SYD → AKL Jul 23, 13:15 UTCJul 23, 15:30 UTC2h 15m
2026-07-23 QFA7354 MEL → SYD Jul 23, 10:20 UTCJul 23, 11:25 UTC1h 5m
2026-07-22 QFA7365 LST → MEL Jul 22, 11:25 UTCJul 22, 12:00 UTC35m
2026-07-21 QFA7356 - Jul 21, 16:40 UTCJul 21, 17:10 UTC30m
2026-07-21 QFA7335 BNE → MEL Jul 21, 12:25 UTCJul 21, 14:20 UTC1h 55m
2026-07-20 QFA7332 BNE → BNE Jul 20, 19:10 UTCJul 21, 11:10 UTC15h 59m
2026-07-20 QFA7353 MEL → BNE Jul 20, 15:55 UTCJul 20, 17:50 UTC1h 55m
2026-07-20 QFA7398 PER → MEL Jul 20, 11:25 UTCJul 20, 14:25 UTC3h 0m
2026-07-16 QFA7390 - Jul 16, 17:54 UTCJul 16, 21:35 UTC3h 40m
2026-07-16 QFA7330 BNE → MEL Jul 16, 15:14 UTCJul 16, 17:10 UTC1h 55m
2026-07-16 QFA7355 MEL → BNE Jul 16, 12:09 UTCJul 16, 14:10 UTC2h 0m
2026-07-15 QFA7335 BNE → MEL Jul 15, 12:45 UTCJul 15, 14:40 UTC1h 55m
2026-07-14 QFA7313 BNE → BNE Jul 14, 19:05 UTCJul 15, 11:15 UTC16h 9m
2026-07-14 QFA7353 MEL → BNE Jul 14, 16:00 UTCJul 14, 17:50 UTC1h 50m
2026-07-14 QFA7398 PER → MEL Jul 14, 11:20 UTCJul 14, 14:45 UTC3h 25m
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

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 Jul 26, 06:15 UTC.
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 20 distinct callsigns, including QFA7523, QFA7353, QFA7335, QFA7398, QFA7332.