Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

7C81E0

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-ZXU · SAAB 340 · operated by REGIONAL EXPRESS PTY LTD

Hex
7C81E0
Octal
37100740
Decimal
8,159,712
Country
AU
Tail
VH-ZXU
Type
SF34
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
406
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S 7C81E0.

Country allocation

The ICAO 24-bit address 7C81E0 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
RXA2268 - 36 2026-07-13
RXA2358 - 19 2026-07-17
RXA2131 - 18 2026-07-16
RXA2132 - 17 2026-07-16
RXA2357 - 16 2026-07-17
RXA2126 - 16 2026-07-16
RXA2125 - 16 2026-07-16
RXA2112 - 16 2026-07-16
RXA2133 - 15 2026-07-16
RXA2377 - 14 2026-07-15
RXA2375 - 14 2026-07-15
RXA2356 - 13 2026-07-15
RXA2376 - 11 2026-07-15
RXA2114 - 11 2026-07-16
RXA2113 - 11 2026-07-16
RXA2354 - 10 2026-07-15
RXA2353 - 10 2026-07-14
RXA2258 Regional Express 8 2026-06-13
RXA4643 - 6 2026-07-21
RXA4632 - 6 2026-06-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RXA6561 OAG → SYD Jul 26, 21:40 UTCJul 26, 22:00 UTC20m
2026-07-26 RXA6588 OAG → PKE Jul 26, 08:50 UTCJul 26, 09:20 UTC30m
2026-07-26 RXA6437 CFS → SYD Jul 26, 06:25 UTCJul 26, 07:30 UTC1h 6m
2026-07-26 RXA6436 SYD → CFS Jul 26, 04:45 UTCJul 26, 05:40 UTC55m
2026-07-26 RXA6464 NRA → SYD Jul 26, 01:25 UTCJul 26, 02:30 UTC1h 5m
2026-07-25 RXA6477 SYD → GFF Jul 25, 08:50 UTCJul 25, 09:35 UTC45m
2026-07-25 RXA6833 DBO → SYD Jul 25, 07:10 UTCJul 25, 08:05 UTC55m
2026-07-25 RXA6832 SYD → DBO Jul 25, 05:25 UTCJul 25, 05:55 UTC30m
2026-07-25 RXA6117 MIM → MYA Jul 25, 02:00 UTCJul 25, 03:05 UTC1h 5m
2026-07-25 RXA6117 MIM → MYA Jul 25, 00:25 UTCJul 25, 01:10 UTC45m
2026-07-24 RXA6658 WGA → SYD Jul 24, 21:35 UTCJul 24, 22:30 UTC55m
2026-07-24 RXA6681 SYD → WGA Jul 24, 09:15 UTCJul 24, 10:05 UTC50m
2026-07-24 RXA6674 WGA → SYD Jul 24, 07:40 UTCJul 24, 08:30 UTC50m
2026-07-22 RXA6661 - Jul 22, 23:35 UTCJul 23, 00:25 UTC50m
2026-07-22 RXA6658 WGA → SYD Jul 22, 21:40 UTCJul 22, 22:20 UTC40m
2026-07-22 RXA3268 MEL → WGA Jul 22, 02:30 UTCJul 22, 02:55 UTC25m
2026-07-22 RXA3764 - Jul 22, 00:55 UTCJul 22, 02:25 UTC1h 30m
2026-07-21 RXA3763 - Jul 21, 23:10 UTCJul 22, 00:00 UTC50m
2026-07-21 RXA3752 - Jul 21, 21:20 UTCJul 21, 22:15 UTC55m
2026-07-21 RXA4643 - Jul 21, 09:35 UTCJul 21, 10:25 UTC50m
2026-07-21 RXA4389 - Jul 21, 08:05 UTCJul 21, 08:45 UTC40m
2026-07-21 RXA4388 ADL → PLO Jul 21, 06:55 UTCJul 21, 08:00 UTC1h 5m
2026-07-21 RXA4367 - Jul 21, 03:30 UTCJul 21, 04:05 UTC35m
2026-07-21 RXA4366 ADL → PLO Jul 21, 02:15 UTCJul 21, 03:10 UTC55m
2026-07-21 RXA4125 - Jul 21, 00:20 UTCJul 21, 00:55 UTC35m
2026-07-20 RXA4124 - Jul 20, 21:50 UTCJul 20, 22:30 UTC40m
2026-07-20 RXA9943 EPR → ADL Jul 20, 08:30 UTCJul 20, 09:10 UTC40m
2026-07-20 RXA9927 BNE → CFS Jul 20, 04:20 UTCJul 20, 05:00 UTC40m
2026-07-17 RXA2358 - Jul 17, 03:10 UTCJul 17, 03:55 UTC45m
2026-07-17 RXA2357 - Jul 17, 00:30 UTCJul 17, 01:00 UTC30m
2026-07-16 RXA2112 - Jul 16, 22:59 UTCJul 16, 23:49 UTC50m
2026-07-16 RXA2133 - Jul 16, 12:05 UTCJul 16, 12:49 UTC45m
2026-07-16 RXA2132 - Jul 16, 10:04 UTCJul 16, 11:25 UTC1h 20m
2026-07-16 RXA2131 - Jul 16, 08:25 UTCJul 16, 09:10 UTC45m
2026-07-16 RXA2126 - Jul 16, 06:45 UTCJul 16, 07:45 UTC1h 0m
2026-07-16 RXA2125 - Jul 16, 05:00 UTCJul 16, 05:45 UTC45m
2026-07-16 RXA2114 - Jul 16, 03:30 UTCJul 16, 04:05 UTC35m
2026-07-16 RXA2113 - Jul 16, 01:00 UTCJul 16, 01:40 UTC40m
2026-07-15 RXA2356 - Jul 15, 23:35 UTCJul 16, 00:10 UTC35m
2026-07-15 RXA2377 - Jul 15, 10:50 UTCJul 15, 11:20 UTC30m
2026-07-15 RXA2376 - Jul 15, 09:30 UTCJul 15, 10:05 UTC35m
2026-07-15 RXA2375 - Jul 15, 06:40 UTCJul 15, 07:10 UTC30m
2026-07-15 RXA2354 - Jul 15, 02:40 UTCJul 15, 03:25 UTC45m
2026-07-14 RXA2353 - Jul 14, 23:55 UTCJul 15, 00:30 UTC35m
2026-07-13 RXA2268 - Jul 13, 10:25 UTCJul 13, 11:00 UTC35m
2026-07-13 RXA2268 - Jul 13, 05:40 UTCJul 13, 06:25 UTC45m
2026-07-13 RXA2358 - Jul 13, 03:15 UTCJul 13, 03:55 UTC40m
2026-07-13 RXA2357 - Jul 13, 00:25 UTCJul 13, 01:05 UTC40m
2026-07-12 RXA2112 - Jul 12, 22:50 UTCJul 12, 23:35 UTC45m
2026-07-12 RXA2133 - Jul 12, 11:05 UTCJul 12, 11:50 UTC45m

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

Mode-S 7C81E0 frequently asked

What is Mode-S code 7C81E0?
7C81E0 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-ZXU.
Where is Mode-S 7C81E0 registered?
Mode-S code 7C81E0 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C81E0 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C81E0, octal 37100740, decimal 8,159,712.
What flights does 7C81E0 operate?
Mode-S 7C81E0 has broadcast 20 distinct callsigns, including RXA2268, RXA2358, RXA2131, RXA2132, RXA2357.