Apparatus

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sensors Mode-S transponder

7C3881

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-LF3 · AGUSTA AW-139

Hex
7C3881
Octal
37034201
Decimal
8,140,929
Country
AU
Tail
VH-LF3
Type
A139
No current signal · last broadcast 1d ago
Flights observed
223
Distinct callsigns
4
Country
AU
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 7C3881.

Country allocation

The ICAO 24-bit address 7C3881 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 4 distinct

Callsign Airline Flights Last seen
RSCU511 - 141 2026-05-08
RSCU522 - 46 2026-07-12
RSCU533 - 30 2026-05-16
LF3 - 6 2026-06-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-12 RSCU522 - Jul 12, 06:01 UTCJul 12, 06:35 UTC35m
2026-07-12 RSCU522 - Jul 12, 04:45 UTCJul 12, 05:10 UTC25m
2026-07-12 RSCU522 - Jul 12, 02:50 UTCJul 12, 03:35 UTC45m
2026-07-11 RSCU522 - Jul 11, 14:05 UTCJul 11, 14:35 UTC30m
2026-07-11 RSCU522 - Jul 11, 13:00 UTCJul 11, 13:30 UTC30m
2026-07-11 RSCU522 - Jul 11, 11:10 UTCJul 11, 11:50 UTC40m
2026-07-08 RSCU522 - Jul 8, 21:15 UTCJul 8, 21:45 UTC30m
2026-07-08 RSCU522 - Jul 8, 20:10 UTCJul 8, 20:35 UTC25m
2026-07-08 RSCU522 - Jul 8, 18:05 UTCJul 8, 19:00 UTC55m
2026-07-08 RSCU522 - Jul 8, 04:50 UTCJul 8, 05:20 UTC30m
2026-07-08 RSCU522 - Jul 8, 02:30 UTCJul 8, 02:55 UTC25m
2026-07-08 RSCU522 - Jul 8, 01:45 UTCJul 8, 02:10 UTC25m
2026-07-07 RSCU522 - Jul 7, 13:00 UTCJul 7, 13:25 UTC25m
2026-07-07 RSCU522 - Jul 7, 12:00 UTCJul 7, 12:25 UTC25m
2026-07-07 RSCU522 - Jul 7, 10:20 UTCJul 7, 11:20 UTC1h 0m
2026-07-04 RSCU522 - Jul 4, 08:05 UTCJul 4, 08:40 UTC35m
2026-07-04 RSCU522 - Jul 4, 07:15 UTCJul 4, 07:20 UTC5m
2026-07-04 RSCU522 - Jul 4, 06:15 UTCJul 4, 06:45 UTC30m
2026-07-04 RSCU522 - Jul 4, 04:15 UTCJul 4, 04:55 UTC40m
2026-07-04 RSCU522 - Jul 4, 02:20 UTCJul 4, 03:10 UTC50m
2026-07-02 RSCU522 - Jul 2, 04:15 UTCJul 2, 04:20 UTC5m
2026-07-02 RSCU522 - Jul 2, 02:35 UTCJul 2, 03:05 UTC30m
2026-07-02 RSCU522 - Jul 2, 01:10 UTCJul 2, 01:40 UTC30m
2026-06-25 RSCU522 - Jun 25, 13:09 UTCJun 25, 13:35 UTC25m
2026-06-25 RSCU522 - Jun 25, 12:19 UTCJun 25, 12:30 UTC10m
2026-06-25 RSCU522 - Jun 25, 10:55 UTCJun 25, 11:35 UTC40m
2026-06-24 RSCU522 - Jun 24, 15:29 UTCJun 24, 15:54 UTC25m
2026-06-24 RSCU522 - Jun 24, 14:24 UTCJun 24, 14:55 UTC30m
2026-06-24 RSCU522 - Jun 24, 12:54 UTCJun 24, 13:44 UTC50m
2026-06-22 RSCU522 - Jun 22, 14:49 UTCJun 22, 15:40 UTC50m
2026-06-22 RSCU522 - Jun 22, 13:25 UTCJun 22, 14:19 UTC55m
2026-06-19 RSCU522 - Jun 19, 17:19 UTCJun 19, 17:55 UTC35m
2026-06-19 RSCU522 - Jun 19, 16:19 UTCJun 19, 16:49 UTC30m
2026-06-19 RSCU522 - Jun 19, 14:39 UTCJun 19, 15:24 UTC45m
2026-06-18 RSCU522 - Jun 18, 11:15 UTCJun 18, 11:50 UTC35m
2026-06-18 RSCU522 - Jun 18, 09:45 UTCJun 18, 10:50 UTC1h 5m
2026-06-18 RSCU522 - Jun 18, 07:35 UTCJun 18, 08:20 UTC45m
2026-06-17 RSCU522 - Jun 17, 05:20 UTCJun 17, 05:25 UTC5m
2026-06-17 RSCU522 - Jun 17, 04:10 UTCJun 17, 04:15 UTC5m
2026-06-17 RSCU522 - Jun 17, 02:30 UTCJun 17, 03:00 UTC30m
2026-06-16 RSCU522 - Jun 16, 06:50 UTCJun 16, 07:40 UTC50m
2026-06-16 RSCU522 - Jun 16, 05:55 UTCJun 16, 06:04 UTC10m
2026-06-16 RSCU522 - Jun 16, 04:00 UTCJun 16, 04:50 UTC50m
2026-06-13 RSCU522 - Jun 13, 05:05 UTCJun 13, 05:50 UTC45m
2026-06-13 RSCU522 - Jun 13, 04:15 UTCJun 13, 04:25 UTC10m
2026-06-13 RSCU522 - Jun 13, 01:55 UTCJun 13, 02:45 UTC50m
2026-06-10 LF3 - Jun 10, 00:55 UTCJun 10, 01:55 UTC1h 0m
2026-06-09 LF3 - Jun 9, 04:30 UTCJun 9, 04:55 UTC25m
2026-06-09 LF3 - Jun 9, 02:20 UTCJun 9, 02:40 UTC20m
2026-06-09 LF3 - Jun 9, 00:25 UTCJun 9, 00:45 UTC20m

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-LF3 page for operator, model, and routing details .

Mode-S 7C3881 frequently asked

What is Mode-S code 7C3881?
7C3881 is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-LF3.
Where is Mode-S 7C3881 registered?
Mode-S code 7C3881 is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C3881 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 7C3881, octal 37034201, decimal 8,140,929.
What flights does 7C3881 operate?
Mode-S 7C3881 has broadcast 4 distinct callsigns, including RSCU511, RSCU522, RSCU533, LF3.