sensors Mode-S transponder

477FF3

ICAO 24-bit transponder address · allocated to Hungary

Currently assigned to 03 · BOEING C-17 Globemaster 3

Hex
477FF3
Octal
21677763
Decimal
4,685,811
Country
HU
Tail
03
Type
C17
No current signal · last broadcast 2d ago
Flights observed
39
Distinct callsigns
10
Country
HU
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 477FF3.

Country allocation

The ICAO 24-bit address 477FF3 falls within the block assigned to Hungary (HU) by ICAO Annex 10, Volume III. Every aircraft registered in Hungary 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 10 distinct

Callsign Airline Flights Last seen
BRK51 - 12 2026-05-18
BRK06 - 6 2026-04-30
BRK97 - 4 2026-05-11
BRK50 - 4 2026-05-23
BRK96 - 3 2026-04-14
BRK01 - 3 2026-04-20
BRK98 - 2 2026-05-27
BRK59 - 2 2026-05-02
BRK33 - 2 2026-04-26
BRK17 - 1 2026-04-12

Recent flights last 39

DateFlightRouteTakeoffLandingDuration
2026-05-27 BRK98 - May 27, 10:20 UTCMay 27, 12:40 UTC2h 20m
2026-05-23 BRK50 - May 23, 08:10 UTCMay 23, 16:05 UTC7h 55m
2026-05-21 BRK50 - May 21, 14:15 UTCMay 21, 21:30 UTC7h 15m
2026-05-20 BRK50 - May 20, 10:05 UTCMay 20, 19:10 UTC9h 5m
2026-05-19 BRK50 - May 19, 07:35 UTCMay 19, 08:25 UTC50m
2026-05-18 BRK51 - May 18, 18:05 UTCMay 18, 18:50 UTC44m
2026-05-18 BRK51 - May 18, 11:40 UTCMay 18, 12:45 UTC1h 5m
2026-05-16 BRK51 - May 16, 12:40 UTCMay 16, 20:30 UTC7h 50m
2026-05-14 BRK51 - May 14, 17:00 UTCMay 14, 21:15 UTC4h 15m
2026-05-13 BRK51 - May 13, 17:10 UTCMay 13, 22:20 UTC5h 10m
2026-05-13 BRK51 - May 13, 08:20 UTCMay 13, 15:50 UTC7h 30m
2026-05-12 BRK51 - May 12, 11:00 UTCMay 12, 13:35 UTC2h 35m
2026-05-11 BRK98 - May 11, 17:25 UTCMay 11, 20:20 UTC2h 55m
2026-05-11 BRK97 - May 11, 16:35 UTCMay 11, 16:55 UTC20m
2026-05-11 BRK97 - May 11, 09:45 UTCMay 11, 12:55 UTC3h 10m
2026-05-02 BRK59 - May 2, 05:55 UTCMay 2, 14:35 UTC8h 40m
2026-04-30 BRK59 - Apr 30, 12:50 UTCApr 30, 14:45 UTC1h 55m
2026-04-30 BRK06 - Apr 30, 11:25 UTCApr 30, 12:10 UTC45m
2026-04-30 BRK06 OSL → RZE Apr 30, 08:10 UTCApr 30, 10:10 UTC2h 0m
2026-04-29 BRK06 - Apr 29, 15:25 UTCApr 29, 17:01 UTC1h 35m
2026-04-28 BRK06 - Apr 28, 15:35 UTCApr 28, 17:45 UTC2h 10m
2026-04-28 BRK06 - Apr 28, 12:05 UTCApr 28, 14:00 UTC1h 55m
2026-04-28 BRK06 - Apr 28, 07:00 UTCApr 28, 09:15 UTC2h 15m
2026-04-26 BRK33 - Apr 26, 22:35 UTCApr 27, 07:45 UTC9h 10m
2026-04-25 BRK33 - Apr 25, 17:05 UTCApr 26, 02:20 UTC9h 15m
2026-04-25 BRK51 - Apr 25, 06:20 UTCApr 25, 13:05 UTC6h 45m
2026-04-23 BRK51 - Apr 23, 11:25 UTCApr 23, 19:35 UTC8h 10m
2026-04-22 BRK51 - Apr 22, 07:55 UTCApr 22, 16:25 UTC8h 30m
2026-04-21 BRK51 - Apr 21, 12:10 UTCApr 21, 13:25 UTC1h 15m
2026-04-21 BRK51 - Apr 21, 10:35 UTCApr 21, 11:25 UTC50m
2026-04-20 BRK01 - Apr 20, 14:10 UTCApr 20, 17:45 UTC3h 35m
2026-04-20 BRK01 - Apr 20, 07:30 UTCApr 20, 10:35 UTC3h 5m
2026-04-19 BRK01 - Apr 19, 09:30 UTCApr 19, 10:20 UTC50m
2026-04-15 BRK97 - Apr 15, 19:15 UTCApr 15, 20:35 UTC1h 20m
2026-04-15 BRK97 - Apr 15, 17:30 UTCApr 15, 18:25 UTC55m
2026-04-14 BRK96 - Apr 14, 09:10 UTCApr 14, 10:40 UTC1h 30m
2026-04-14 BRK96 - Apr 14, 07:50 UTCApr 14, 09:05 UTC1h 15m
2026-04-13 BRK96 - Apr 13, 13:05 UTCApr 13, 13:45 UTC40m
2026-04-12 BRK17 - Apr 12, 17:15 UTCApr 12, 17:30 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 03 page for operator, model, and routing details .

Mode-S 477FF3 frequently asked

What is Mode-S code 477FF3?
477FF3 is an ICAO 24-bit transponder address. Allocated to Hungary. Assigned to 03.
Where is Mode-S 477FF3 registered?
Mode-S code 477FF3 is allocated to Hungary (HU). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 477FF3 broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 477FF3, octal 21677763, decimal 4,685,811.
What flights does 477FF3 operate?
Mode-S 477FF3 has broadcast 10 distinct callsigns, including BRK51, BRK06, BRK97, BRK50, BRK96.