Apparatus

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sensors Mode-S transponder

7C19BD

ICAO 24-bit transponder address · allocated to Australia

Currently assigned to VH-FDB · BEECHCRAFT Super King Air 350 · operated by ROYAL FLYING DOCTOR SERVICE OF AUSTRALIA (QUEENSLAND SECTION) LIMITED

Hex
7C19BD
Octal
37014675
Decimal
8,133,053
Country
AU
Tail
VH-FDB
Type
B350
No current signal · last broadcast 20d ago
Flights observed
82
Distinct callsigns
1
Country
AU
Last broadcast
20d ago

Last known position

Most recent position reported by Mode-S 7C19BD.

Country allocation

The ICAO 24-bit address 7C19BD 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 1 distinct

Callsign Airline Flights Last seen
FD412 - 82 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 FD412 - Jul 25, 08:40 UTCJul 25, 09:00 UTC20m
2026-07-25 FD412 - Jul 25, 07:30 UTCJul 25, 07:45 UTC15m
2026-07-24 FD412 - Jul 24, 01:30 UTCJul 24, 01:50 UTC20m
2026-07-24 FD412 - Jul 24, 00:20 UTCJul 24, 00:40 UTC20m
2026-07-22 FD412 - Jul 22, 04:45 UTCJul 22, 05:25 UTC40m
2026-07-22 FD412 - Jul 22, 02:45 UTCJul 22, 03:15 UTC30m
2026-07-18 FD412 - Jul 18, 12:10 UTCJul 18, 13:10 UTC1h 0m
2026-07-16 FD412 - Jul 16, 00:35 UTCJul 16, 00:50 UTC15m
2026-07-15 FD412 - Jul 15, 22:20 UTCJul 15, 22:30 UTC10m
2026-07-14 FD412 - Jul 14, 22:35 UTCJul 14, 22:45 UTC9m
2026-07-14 FD412 - Jul 14, 21:40 UTCJul 14, 21:50 UTC10m
2026-07-13 FD412 - Jul 13, 04:05 UTCJul 13, 04:25 UTC20m
2026-07-13 FD412 - Jul 13, 01:45 UTCJul 13, 02:10 UTC25m
2026-07-11 FD412 - Jul 11, 10:25 UTCJul 11, 10:45 UTC20m
2026-07-11 FD412 - Jul 11, 09:20 UTCJul 11, 09:40 UTC20m
2026-07-06 FD412 - Jul 6, 08:25 UTCJul 6, 08:45 UTC20m
2026-07-06 FD412 - Jul 6, 07:20 UTCJul 6, 07:40 UTC20m
2026-07-06 FD412 - Jul 6, 06:10 UTCJul 6, 06:30 UTC20m
2026-07-04 FD412 - Jul 4, 06:30 UTCJul 4, 06:50 UTC20m
2026-07-04 FD412 - Jul 4, 05:25 UTCJul 4, 05:45 UTC20m
2026-07-03 FD412 - Jul 3, 10:40 UTCJul 3, 11:05 UTC25m
2026-07-03 FD412 - Jul 3, 09:25 UTCJul 3, 09:45 UTC20m
2026-07-03 FD412 - Jul 3, 05:25 UTCJul 3, 05:40 UTC15m
2026-07-03 FD412 - Jul 3, 04:20 UTCJul 3, 04:40 UTC20m
2026-07-02 FD412 - Jul 2, 05:50 UTCJul 2, 06:20 UTC30m
2026-07-02 FD412 - Jul 2, 04:20 UTCJul 2, 04:35 UTC15m
2026-07-01 FD412 - Jul 1, 05:05 UTCJul 1, 05:25 UTC20m
2026-07-01 FD412 - Jul 1, 04:15 UTCJul 1, 04:35 UTC20m
2026-06-28 FD412 - Jun 28, 22:55 UTCJun 28, 23:14 UTC20m
2026-06-28 FD412 - Jun 28, 21:50 UTCJun 28, 22:10 UTC20m
2026-06-28 FD412 - Jun 28, 10:35 UTCJun 28, 10:55 UTC20m
2026-06-28 FD412 - Jun 28, 09:30 UTCJun 28, 09:50 UTC20m
2026-06-23 FD412 - Jun 23, 08:25 UTCJun 23, 08:50 UTC25m
2026-06-23 FD412 - Jun 23, 04:25 UTCJun 23, 08:00 UTC3h 35m
2026-06-16 FD412 - Jun 16, 08:05 UTCJun 16, 08:30 UTC25m
2026-06-16 FD412 - Jun 16, 07:15 UTCJun 16, 07:34 UTC20m
2026-06-16 FD412 - Jun 16, 04:30 UTCJun 16, 04:45 UTC15m
2026-06-16 FD412 - Jun 16, 02:09 UTCJun 16, 02:24 UTC15m
2026-06-15 FD412 - Jun 15, 07:45 UTCJun 15, 08:04 UTC20m
2026-06-15 FD412 - Jun 15, 05:40 UTCJun 15, 06:00 UTC20m
2026-06-15 FD412 - Jun 15, 04:20 UTCJun 15, 05:04 UTC45m
2026-06-15 FD412 - Jun 15, 00:24 UTCJun 15, 02:04 UTC1h 40m
2026-06-14 FD412 - Jun 14, 17:45 UTCJun 14, 18:05 UTC20m
2026-06-14 FD412 - Jun 14, 13:45 UTCJun 14, 14:00 UTC15m
2026-06-14 FD412 - Jun 14, 01:30 UTCJun 14, 01:45 UTC15m
2026-06-13 FD412 - Jun 13, 23:15 UTCJun 13, 23:35 UTC20m
2026-06-12 FD412 - Jun 12, 05:30 UTCJun 12, 05:50 UTC20m
2026-06-12 FD412 - Jun 12, 04:15 UTCJun 12, 04:30 UTC15m
2026-06-11 FD412 - Jun 11, 00:10 UTCJun 11, 00:30 UTC20m
2026-06-10 FD412 - Jun 10, 22:45 UTCJun 10, 23:00 UTC15m

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

Mode-S 7C19BD frequently asked

What is Mode-S code 7C19BD?
7C19BD is an ICAO 24-bit transponder address. Allocated to Australia. Assigned to VH-FDB.
Where is Mode-S 7C19BD registered?
Mode-S code 7C19BD is allocated to Australia (AU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 7C19BD broadcasting right now?
No active broadcast right now. Last signal was 20d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 7C19BD, octal 37014675, decimal 8,133,053.
What flights does 7C19BD operate?
Mode-S 7C19BD has broadcast 1 distinct callsign, including FD412.