sensors Mode-S transponder
4851AE
ICAO 24-bit transponder address · allocated to Netherlands
Currently assigned to PH-BHC · BOEING 787-9 Dreamliner
- Hex
- 4851AE
- Octal
- 22050656
- Decimal
- 4,739,502
- Country
- NL
- Tail
- PH-BHC
- Type
- B789
- Flights observed
- 229
- Distinct callsigns
- 20
- Country
- NL
- Last broadcast
- Jul 26, 15:15 UTC
Last known position
Country allocation
The ICAO 24-bit address 4851AE falls within the block assigned to Netherlands (NL) by ICAO Annex 10, Volume III. Every aircraft registered in Netherlands 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 |
|---|---|---|---|
| KLM809 | KLM Royal Dutch Airlines | 26 | 2026-07-20 |
| KLM810 | KLM Royal Dutch Airlines | 23 | 2026-07-20 |
| KLM296 | KLM Royal Dutch Airlines | 15 | 2026-05-02 |
| KLM225 | - | 14 | 2026-05-02 |
| KLM751 | KLM Royal Dutch Airlines | 13 | 2026-07-21 |
| KLM897 | - | 11 | 2026-07-16 |
| KLM888 | KLM Royal Dutch Airlines | 11 | 2026-07-26 |
| KLM887 | KLM Royal Dutch Airlines | 11 | 2026-07-26 |
| KLM896 | - | 7 | 2026-06-21 |
| KLM755 | KLM Royal Dutch Airlines | 7 | 2026-06-08 |
| KLM898 | - | 6 | 2026-07-16 |
| KLM643 | KLM Royal Dutch Airlines | 5 | 2026-05-19 |
| KLM250 | KLM Royal Dutch Airlines | 5 | 2026-04-26 |
| KLM895 | - | 4 | 2026-06-21 |
| KLM868 | - | 4 | 2026-07-19 |
| KLM867 | - | 4 | 2026-07-18 |
| KLM655 | KLM Royal Dutch Airlines | 4 | 2026-04-26 |
| KLM640 | KLM Royal Dutch Airlines | 4 | 2026-06-11 |
| KLM639 | KLM Royal Dutch Airlines | 4 | 2026-06-11 |
| KLM862 | KLM Royal Dutch Airlines | 3 | 2026-07-25 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-26 | KLM888 | HKG → AMS | Jul 26, 15:00 UTC | Jul 26, 15:15 UTC | 15m |
| 2026-07-26 | KLM887 | AMS → HKG | Jul 26, 08:35 UTC | Jul 26, 09:05 UTC | 30m |
| 2026-07-25 | KLM887 | AMS → HKG | Jul 25, 21:45 UTC | Jul 26, 00:25 UTC | 2h 40m |
| 2026-07-25 | KLM862 | NRT → AMS | Jul 25, 03:20 UTC | Jul 25, 16:20 UTC | 13h 0m |
| 2026-07-24 | KLM861 | AMS → NRT | Jul 24, 12:20 UTC | Jul 25, 00:55 UTC | 12h 35m |
| 2026-07-23 | KLM856 | ICN → AMS | Jul 23, 13:40 UTC | Jul 24, 02:35 UTC | 12h 55m |
| 2026-07-23 | KLM855 | AMS → ICN | Jul 23, 07:05 UTC | Jul 23, 07:35 UTC | 30m |
| 2026-07-22 | KLM855 | AMS → ICN | Jul 22, 20:05 UTC | Jul 22, 23:55 UTC | 3h 50m |
| 2026-07-21 | KLM751 | GYE → AMS | Jul 21, 18:20 UTC | Jul 22, 11:30 UTC | 17h 10m |
| 2026-07-21 | KLM751 | GYE → AMS | Jul 21, 08:55 UTC | Jul 22, 03:05 UTC | 18h 10m |
| 2026-07-20 | KLM810 | KUL → AMS | Jul 20, 19:00 UTC | Jul 21, 04:40 UTC | 9h 39m |
| 2026-07-20 | KLM810 | KUL → AMS | Jul 20, 16:20 UTC | Jul 20, 16:35 UTC | 15m |
| 2026-07-20 | KLM810 | KUL → AMS | Jul 20, 12:35 UTC | Jul 20, 14:20 UTC | 1h 45m |
| 2026-07-20 | KLM809 | AMS → KUL | Jul 20, 10:40 UTC | Jul 20, 11:00 UTC | 20m |
| 2026-07-20 | KLM809 | AMS → KUL | Jul 20, 09:20 UTC | Jul 20, 10:10 UTC | 50m |
| 2026-07-19 | KLM809 | AMS → KUL | Jul 19, 19:50 UTC | Jul 20, 07:25 UTC | 11h 35m |
| 2026-07-19 | KLM868 | - | Jul 19, 03:15 UTC | Jul 19, 16:50 UTC | 13h 35m |
| 2026-07-18 | KLM867 | AMS → KIX | Jul 18, 13:00 UTC | Jul 19, 00:45 UTC | 11h 45m |
| 2026-07-17 | KLM888 | HKG → AMS | Jul 17, 17:05 UTC | Jul 18, 03:20 UTC | 10h 16m |
| 2026-07-17 | KLM888 | - | Jul 17, 14:50 UTC | Jul 17, 15:10 UTC | 20m |
| 2026-07-17 | KLM887 | - | Jul 17, 06:25 UTC | Jul 17, 07:00 UTC | 35m |
| 2026-07-16 | KLM887 | - | Jul 16, 19:45 UTC | Jul 16, 23:40 UTC | 3h 55m |
| 2026-07-16 | KLM898 | - | Jul 16, 10:15 UTC | Jul 16, 15:00 UTC | 4h 45m |
| 2026-07-16 | KLM897 | - | Jul 16, 00:00 UTC | Jul 16, 00:20 UTC | 20m |
| 2026-07-15 | KLM897 | - | Jul 15, 14:30 UTC | Jul 15, 18:30 UTC | 4h 0m |
| 2026-07-14 | KLM751 | - | Jul 14, 17:10 UTC | Jul 15, 11:05 UTC | 17h 54m |
| 2026-07-14 | KLM751 | - | Jul 14, 09:35 UTC | Jul 15, 09:30 UTC | 23h 54m |
| 2026-07-14 | KLM751 | - | Jul 14, 08:40 UTC | Jul 15, 03:20 UTC | 18h 39m |
| 2026-07-13 | KLM898 | - | Jul 13, 10:05 UTC | Jul 13, 14:50 UTC | 4h 45m |
| 2026-07-13 | KLM897 | - | Jul 13, 00:01 UTC | Jul 13, 00:20 UTC | 20m |
| 2026-07-12 | KLM897 | - | Jul 12, 14:30 UTC | Jul 12, 18:25 UTC | 3h 55m |
| 2026-07-11 | KLM751 | - | Jul 11, 16:35 UTC | Jul 12, 10:50 UTC | 18h 15m |
| 2026-07-11 | KLM751 | - | Jul 11, 09:35 UTC | Jul 12, 09:30 UTC | 23h 55m |
| 2026-07-11 | KLM751 | - | Jul 11, 09:00 UTC | Jul 12, 01:00 UTC | 16h 0m |
| 2026-07-10 | KLM808 | - | Jul 10, 16:05 UTC | Jul 11, 05:45 UTC | 13h 41m |
| 2026-07-10 | KLM808 | - | Jul 10, 12:50 UTC | Jul 10, 14:25 UTC | 1h 35m |
| 2026-07-10 | KLM807 | TPE → MNL | Jul 10, 08:05 UTC | Jul 10, 09:50 UTC | 1h 45m |
| 2026-07-09 | KLM807 | - | Jul 9, 18:35 UTC | Jul 10, 06:25 UTC | 11h 50m |
| 2026-07-09 | KLM898 | - | Jul 9, 10:25 UTC | Jul 9, 15:10 UTC | 4h 45m |
| 2026-07-09 | KLM898 | - | Jul 9, 03:20 UTC | Jul 9, 03:35 UTC | 15m |
| 2026-07-09 | KLM897 | - | Jul 9, 00:05 UTC | Jul 9, 00:25 UTC | 20m |
| 2026-07-08 | KLM897 | - | Jul 8, 14:40 UTC | Jul 8, 18:35 UTC | 3h 55m |
| 2026-07-07 | KLM751 | - | Jul 7, 16:30 UTC | Jul 8, 10:50 UTC | 18h 20m |
| 2026-07-07 | KLM751 | - | Jul 7, 08:45 UTC | Jul 8, 03:00 UTC | 18h 15m |
| 2026-07-06 | KLM192 | - | Jul 6, 20:40 UTC | Jul 7, 05:15 UTC | 8h 35m |
| 2026-07-06 | KLM661 | - | Jul 6, 08:30 UTC | Jul 6, 18:20 UTC | 9h 50m |
| 2026-07-05 | KLM810 | - | Jul 5, 16:30 UTC | Jul 6, 04:45 UTC | 12h 15m |
| 2026-07-05 | KLM810 | - | Jul 5, 12:55 UTC | Jul 5, 14:30 UTC | 1h 35m |
| 2026-07-05 | KLM809 | - | Jul 5, 09:25 UTC | Jul 5, 11:00 UTC | 1h 35m |
| 2026-07-04 | KLM809 | - | Jul 4, 19:30 UTC | Jul 5, 07:30 UTC | 12h 0m |
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 PH-BHC page for operator, model, and routing details .