Apparatus

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sensors Mode-S transponder

7C8023

ICAO 24-bit transponder address · allocated to Australia

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

Hex
7C8023
Octal
37100043
Decimal
8,159,267
Country
AU
Tail
VH-ZLH
Type
SF34
No current signal · last broadcast Jul 26, 21:55 UTC
Flights observed
508
Distinct callsigns
20
Country
AU
Last broadcast
Jul 26, 21:55 UTC

Last known position

Most recent position reported by Mode-S 7C8023.

Country allocation

The ICAO 24-bit address 7C8023 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
RXA6658 Regional Express 15 2026-07-21
RXA6661 - 14 2026-07-17
RXA6681 Regional Express 13 2026-07-21
RXA3656 - 12 2026-07-12
RXA3281 - 12 2026-07-20
RXA6674 Regional Express 11 2026-07-21
RXA3653 - 11 2026-07-09
RXA3684 - 10 2026-07-09
RXA3657 - 10 2026-07-13
RXA6825 Regional Express 9 2026-07-25
RXA6824 Regional Express 9 2026-07-24
RXA3783 - 9 2026-07-20
RXA3752 - 9 2026-07-20
RXA3685 - 9 2026-07-09
RXA3682 - 9 2026-07-09
RXA3258 Regional Express 9 2026-07-20
RXA6117 - 8 2026-06-30
RXA3286 Regional Express 8 2026-07-19
RXA6437 - 7 2026-07-01
RXA6436 - 7 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 RXA6821 DBO → SYD Jul 26, 21:05 UTCJul 26, 21:55 UTC50m
2026-07-26 RXA6836 SYD → DBO Jul 26, 09:20 UTCJul 26, 09:55 UTC35m
2026-07-26 RXA6833 DBO → SYD Jul 26, 07:25 UTCJul 26, 08:10 UTC45m
2026-07-26 RXA6832 SYD → DBO Jul 26, 05:45 UTCJul 26, 06:15 UTC30m
2026-07-26 RXA6126 MIM → SYD Jul 26, 03:50 UTCJul 26, 04:50 UTC1h 0m
2026-07-26 RXA6123 SYD → MIM Jul 26, 02:10 UTCJul 26, 02:55 UTC45m
2026-07-25 RXA6529 PKE → SYD Jul 25, 03:40 UTCJul 25, 04:35 UTC55m
2026-07-25 RXA6528 SYD → PKE Jul 25, 02:05 UTCJul 25, 02:35 UTC30m
2026-07-25 RXA6825 DBO → SYD Jul 25, 00:20 UTCJul 25, 01:20 UTC1h 0m
2026-07-24 RXA6824 SYD → DBO Jul 24, 23:00 UTCJul 24, 23:25 UTC25m
2026-07-24 RXA6821 DBO → SYD Jul 24, 21:00 UTCJul 24, 22:20 UTC1h 20m
2026-07-24 RXA6836 SYD → DBO Jul 24, 09:55 UTCJul 24, 10:30 UTC35m
2026-07-24 RXA6833 DBO → SYD Jul 24, 07:30 UTCJul 24, 08:25 UTC55m
2026-07-24 RXA6832 SYD → DBO Jul 24, 05:40 UTCJul 24, 06:15 UTC35m
2026-07-24 RXA6529 PKE → SYD Jul 24, 03:45 UTCJul 24, 04:25 UTC40m
2026-07-24 RXA6528 SYD → PKE Jul 24, 02:10 UTCJul 24, 02:45 UTC35m
2026-07-24 RXA6825 DBO → SYD Jul 24, 00:20 UTCJul 24, 01:05 UTC45m
2026-07-23 RXA6824 SYD → DBO Jul 23, 22:55 UTCJul 23, 23:25 UTC30m
2026-07-23 RXA6821 DBO → SYD Jul 23, 21:15 UTCJul 23, 22:40 UTC1h 25m
2026-07-23 RXA6836 SYD → DBO Jul 23, 09:50 UTCJul 23, 10:20 UTC30m
2026-07-23 RXA6833 DBO → SYD Jul 23, 07:45 UTCJul 23, 08:30 UTC45m
2026-07-23 RXA6832 SYD → DBO Jul 23, 05:40 UTCJul 23, 06:15 UTC35m
2026-07-23 RXA6529 PKE → SYD Jul 23, 03:40 UTCJul 23, 04:20 UTC40m
2026-07-23 RXA6528 SYD → PKE Jul 23, 02:05 UTCJul 23, 02:40 UTC35m
2026-07-23 RXA6825 DBO → SYD Jul 23, 00:25 UTCJul 23, 01:10 UTC45m
2026-07-22 RXA6824 - Jul 22, 22:40 UTCJul 22, 23:15 UTC35m
2026-07-22 RXA6821 DBO → SYD Jul 22, 20:55 UTCJul 22, 21:35 UTC40m
2026-07-22 RXA6529 PKE → SYD Jul 22, 03:55 UTCJul 22, 04:40 UTC45m
2026-07-22 RXA6528 SYD → PKE Jul 22, 02:20 UTCJul 22, 03:00 UTC40m
2026-07-22 RXA6825 DBO → SYD Jul 22, 00:20 UTCJul 22, 01:10 UTC50m
2026-07-21 RXA6824 - Jul 21, 22:40 UTCJul 21, 23:20 UTC40m
2026-07-21 RXA6658 WGA → SYD Jul 21, 20:55 UTCJul 21, 21:45 UTC50m
2026-07-21 RXA6681 SYD → WGA Jul 21, 09:05 UTCJul 21, 09:50 UTC45m
2026-07-21 RXA6674 WGA → SYD Jul 21, 07:10 UTCJul 21, 08:10 UTC1h 0m
2026-07-20 RXA3258 MEL → WGA Jul 20, 23:00 UTCJul 20, 23:30 UTC30m
2026-07-20 RXA3752 - Jul 20, 21:05 UTCJul 20, 22:00 UTC55m
2026-07-20 RXA3783 - Jul 20, 09:05 UTCJul 20, 09:55 UTC50m
2026-07-20 RXA3281 - Jul 20, 07:00 UTCJul 20, 07:35 UTC35m
2026-07-20 RXA3268 MEL → WGA Jul 20, 02:35 UTCJul 20, 03:05 UTC30m
2026-07-20 RXA3764 - Jul 20, 00:40 UTCJul 20, 01:40 UTC1h 0m
2026-07-19 RXA3763 - Jul 19, 23:15 UTCJul 20, 00:05 UTC50m
2026-07-19 RXA3257 - Jul 19, 21:50 UTCJul 19, 22:25 UTC35m
2026-07-19 RXA3286 MEL → WGA Jul 19, 08:35 UTCJul 19, 09:05 UTC30m
2026-07-19 RXA3281 - Jul 19, 07:05 UTCJul 19, 07:40 UTC35m
2026-07-17 RXA6661 - Jul 17, 23:05 UTCJul 17, 23:45 UTC40m
2026-07-17 RXA6658 WGA → SYD Jul 17, 20:55 UTCJul 17, 22:00 UTC1h 5m
2026-07-17 RXA3286 - Jul 17, 08:30 UTCJul 17, 09:10 UTC40m
2026-07-17 RXA3281 - Jul 17, 06:54 UTCJul 17, 07:35 UTC40m
2026-07-16 RXA6661 - Jul 16, 23:35 UTCJul 17, 00:20 UTC45m
2026-07-16 RXA6658 WGA → SYD Jul 16, 21:40 UTCJul 16, 22:35 UTC55m

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

Mode-S 7C8023 frequently asked

What is Mode-S code 7C8023?
7C8023 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-ZLH.
Where is Mode-S 7C8023 registered?
Mode-S code 7C8023 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C8023 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C8023, octal 37100043, decimal 8,159,267.
What flights does 7C8023 operate?
Mode-S 7C8023 has broadcast 20 distinct callsigns, including RXA6658, RXA6661, RXA6681, RXA3656, RXA3281.