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
- Flights observed
- 78
- Distinct callsigns
- 16
- Country
- HU
- Last broadcast
- 10h ago
Last known position
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 16 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| BRK51 | - | 17 | 2026-06-05 |
| BRK97 | - | 13 | 2026-07-13 |
| BRK50 | - | 8 | 2026-06-10 |
| BRK06 | - | 6 | 2026-04-30 |
| BRK88 | - | 4 | 2026-07-12 |
| BRK54 | - | 4 | 2026-06-29 |
| BRK33 | - | 4 | 2026-07-01 |
| BRK99 | - | 3 | 2026-07-06 |
| BRK96 | - | 3 | 2026-04-14 |
| BRK49 | - | 3 | 2026-07-05 |
| BRK25 | - | 3 | 2026-06-20 |
| BRK01 | - | 3 | 2026-04-20 |
| BRK98 | - | 2 | 2026-05-27 |
| BRK59 | - | 2 | 2026-05-02 |
| BRK42 | - | 2 | 2026-06-20 |
| BRK17 | - | 1 | 2026-04-12 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | BRK97 | - | Jul 13, 19:10 UTC | Jul 13, 20:35 UTC | 1h 25m |
| 2026-07-13 | BRK97 | - | Jul 13, 17:05 UTC | Jul 13, 18:30 UTC | 1h 25m |
| 2026-07-12 | BRK88 | - | Jul 12, 13:55 UTC | Jul 12, 23:10 UTC | 9h 15m |
| 2026-07-10 | BRK88 | - | Jul 10, 16:10 UTC | Jul 10, 18:40 UTC | 2h 30m |
| 2026-07-09 | BRK88 | - | Jul 9, 13:25 UTC | Jul 9, 21:20 UTC | 7h 55m |
| 2026-07-09 | BRK88 | - | Jul 9, 08:20 UTC | Jul 9, 10:55 UTC | 2h 35m |
| 2026-07-08 | BRK97 | - | Jul 8, 12:35 UTC | Jul 8, 13:45 UTC | 1h 10m |
| 2026-07-08 | BRK97 | - | Jul 8, 11:45 UTC | Jul 8, 11:55 UTC | 10m |
| 2026-07-08 | BRK97 | - | Jul 8, 10:20 UTC | Jul 8, 11:10 UTC | 50m |
| 2026-07-08 | BRK97 | - | Jul 8, 09:05 UTC | Jul 8, 09:35 UTC | 30m |
| 2026-07-06 | BRK99 | - | Jul 6, 13:50 UTC | Jul 6, 15:20 UTC | 1h 30m |
| 2026-07-06 | BRK99 | - | Jul 6, 10:45 UTC | Jul 6, 13:10 UTC | 2h 25m |
| 2026-07-06 | BRK99 | - | Jul 6, 08:05 UTC | Jul 6, 10:00 UTC | 1h 55m |
| 2026-07-05 | BRK49 | - | Jul 5, 12:45 UTC | Jul 5, 14:05 UTC | 1h 20m |
| 2026-07-05 | BRK49 | - | Jul 5, 02:10 UTC | Jul 5, 11:25 UTC | 9h 15m |
| 2026-07-02 | BRK49 | - | Jul 2, 08:40 UTC | Jul 2, 13:05 UTC | 4h 25m |
| 2026-07-01 | BRK33 | - | Jul 1, 10:40 UTC | Jul 1, 13:50 UTC | 3h 10m |
| 2026-07-01 | BRK33 | - | Jul 1, 08:25 UTC | Jul 1, 09:55 UTC | 1h 30m |
| 2026-06-29 | BRK54 | - | Jun 29, 19:09 UTC | Jun 30, 05:15 UTC | 10h 6m |
| 2026-06-28 | BRK54 | - | Jun 28, 16:29 UTC | Jun 28, 19:25 UTC | 2h 55m |
| 2026-06-26 | BRK54 | - | Jun 26, 10:05 UTC | Jun 26, 11:49 UTC | 1h 45m |
| 2026-06-25 | BRK54 | - | Jun 25, 16:05 UTC | Jun 25, 17:34 UTC | 1h 30m |
| 2026-06-24 | BRK97 | - | Jun 24, 10:04 UTC | Jun 24, 12:34 UTC | 2h 30m |
| 2026-06-20 | BRK42 | - | Jun 20, 17:49 UTC | Jun 20, 18:40 UTC | 50m |
| 2026-06-20 | BRK42 | - | Jun 20, 14:29 UTC | Jun 20, 16:29 UTC | 2h 0m |
| 2026-06-20 | BRK25 | - | Jun 20, 10:44 UTC | Jun 20, 12:50 UTC | 2h 5m |
| 2026-06-19 | BRK25 | - | Jun 19, 14:54 UTC | Jun 19, 16:44 UTC | 1h 50m |
| 2026-06-19 | BRK25 | - | Jun 19, 10:59 UTC | Jun 19, 12:39 UTC | 1h 40m |
| 2026-06-12 | BRK97 | - | Jun 12, 09:05 UTC | Jun 12, 11:15 UTC | 2h 10m |
| 2026-06-10 | BRK50 | - | Jun 10, 08:10 UTC | Jun 10, 17:50 UTC | 9h 40m |
| 2026-06-09 | BRK50 | - | Jun 9, 06:50 UTC | Jun 9, 14:15 UTC | 7h 25m |
| 2026-06-07 | BRK50 | - | Jun 7, 11:35 UTC | Jun 7, 20:05 UTC | 8h 30m |
| 2026-06-06 | BRK50 | - | Jun 6, 07:50 UTC | Jun 6, 16:34 UTC | 8h 45m |
| 2026-06-05 | BRK51 | - | Jun 5, 07:50 UTC | Jun 5, 08:45 UTC | 55m |
| 2026-06-03 | BRK51 | - | Jun 3, 10:55 UTC | Jun 3, 18:25 UTC | 7h 30m |
| 2026-06-02 | BRK51 | - | Jun 2, 09:05 UTC | Jun 2, 16:55 UTC | 7h 50m |
| 2026-06-01 | BRK51 | - | Jun 1, 12:30 UTC | Jun 1, 13:30 UTC | 1h 0m |
| 2026-06-01 | BRK51 | - | Jun 1, 08:40 UTC | Jun 1, 09:25 UTC | 45m |
| 2026-05-30 | BRK97 | - | May 30, 14:10 UTC | May 30, 14:45 UTC | 35m |
| 2026-05-27 | BRK98 | - | May 27, 10:20 UTC | May 27, 12:40 UTC | 2h 20m |
| 2026-05-23 | BRK50 | - | May 23, 08:10 UTC | May 23, 16:05 UTC | 7h 55m |
| 2026-05-21 | BRK50 | - | May 21, 14:15 UTC | May 21, 21:30 UTC | 7h 15m |
| 2026-05-20 | BRK50 | - | May 20, 10:05 UTC | May 20, 19:10 UTC | 9h 5m |
| 2026-05-19 | BRK50 | - | May 19, 07:35 UTC | May 19, 08:25 UTC | 50m |
| 2026-05-18 | BRK51 | - | May 18, 18:05 UTC | May 18, 18:50 UTC | 44m |
| 2026-05-18 | BRK51 | - | May 18, 11:40 UTC | May 18, 12:45 UTC | 1h 5m |
| 2026-05-16 | BRK51 | - | May 16, 12:40 UTC | May 16, 20:30 UTC | 7h 50m |
| 2026-05-14 | BRK51 | - | May 14, 17:00 UTC | May 14, 21:15 UTC | 4h 15m |
| 2026-05-13 | BRK51 | - | May 13, 17:10 UTC | May 13, 22:20 UTC | 5h 10m |
| 2026-05-13 | BRK51 | - | May 13, 08:20 UTC | May 13, 15:50 UTC | 7h 30m |
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 .