Apparatus

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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
Broadcasting now · callsign KLM867 · 35,000 ft
Flights observed
107
Distinct callsigns
20
Country
NL
Last broadcast
1h ago

Current position

4851AE is currently broadcasting. Map zoomed to live 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
KLM296 KLM Royal Dutch Airlines 15 2026-05-02
KLM225 - 14 2026-05-02
KLM810 KLM Royal Dutch Airlines 9 2026-05-28
KLM809 KLM Royal Dutch Airlines 9 2026-05-28
KLM643 KLM Royal Dutch Airlines 5 2026-05-19
KLM250 KLM Royal Dutch Airlines 5 2026-04-26
KLM755 KLM Royal Dutch Airlines 4 2026-05-07
KLM655 KLM Royal Dutch Airlines 4 2026-04-26
KLM897 KLM Royal Dutch Airlines 3 2026-05-23
KLM751 KLM Royal Dutch Airlines 3 2026-05-14
KLM741 KLM Royal Dutch Airlines 3 2026-05-11
KLM896 KLM Royal Dutch Airlines 2 2026-05-12
KLM895 KLM Royal Dutch Airlines 2 2026-05-11
KLM888 KLM Royal Dutch Airlines 2 2026-05-13
KLM887 KLM Royal Dutch Airlines 2 2026-05-13
KLM856 KLM Royal Dutch Airlines 2 2026-05-17
KLM743 KLM Royal Dutch Airlines 2 2026-05-22
KLM644 KLM Royal Dutch Airlines 2 2026-05-20
KLM640 KLM Royal Dutch Airlines 2 2026-04-23
KLM639 KLM Royal Dutch Airlines 2 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 KLM867 AMS → KIX May 30, 13:00 UTCMay 30, 13:30 UTC30m
2026-05-29 KLM192 IAH → AMS May 29, 21:15 UTCMay 30, 05:55 UTC8h 40m
2026-05-29 KLM661 AMS → IAH May 29, 08:45 UTCMay 29, 18:20 UTC9h 35m
2026-05-28 KLM810 KUL → AMS May 28, 20:00 UTCMay 29, 04:50 UTC8h 50m
2026-05-28 KLM810 KUL → AMS May 28, 16:15 UTCMay 28, 16:35 UTC20m
2026-05-28 KLM810 KUL → AMS May 28, 12:45 UTCMay 28, 14:25 UTC1h 40m
2026-05-28 KLM809 AMS → KUL May 28, 10:30 UTCMay 28, 10:45 UTC15m
2026-05-28 KLM809 AMS → KUL May 28, 09:05 UTCMay 28, 10:00 UTC55m
2026-05-27 KLM809 AMS → KUL May 27, 19:55 UTCMay 28, 07:20 UTC11h 25m
2026-05-27 KLM846 ICN → AMS May 27, 02:34 UTCMay 27, 14:25 UTC11h 50m
2026-05-26 KLM845 AMS → ICN May 26, 14:00 UTCMay 27, 00:19 UTC10h 20m
2026-05-25 KLM898D - May 25, 09:35 UTCMay 25, 17:10 UTC7h 35m
2026-05-23 KLM897 AMS → PEK May 23, 14:05 UTCMay 23, 18:20 UTC4h 16m
2026-05-22 KLM744 LIM → AMS May 22, 18:35 UTCMay 23, 10:15 UTC15h 39m
2026-05-22 KLM743 AMS → LIM May 22, 09:35 UTCMay 23, 09:30 UTC23h 54m
2026-05-22 KLM743 AMS → LIM May 22, 08:15 UTCMay 23, 00:00 UTC15h 45m
2026-05-21 KLM810 KUL → AMS May 21, 20:20 UTCMay 22, 04:40 UTC8h 20m
2026-05-21 KLM810 KUL → AMS May 21, 16:20 UTCMay 21, 16:35 UTC15m
2026-05-21 KLM810 KUL → AMS May 21, 12:45 UTCMay 21, 14:20 UTC1h 35m
2026-05-21 KLM809 AMS → KUL May 21, 09:15 UTCMay 21, 10:55 UTC1h 40m
2026-05-21 KLM809 AMS → KUL May 21, 07:05 UTCMay 21, 07:25 UTC20m
2026-05-20 KLM809 AMS → KUL May 20, 19:30 UTCMay 21, 03:05 UTC7h 35m
2026-05-20 KLM644 JFK → AMS May 20, 05:50 UTCMay 20, 12:10 UTC6h 20m
2026-05-19 KLM643 AMS → JFK May 19, 20:20 UTCMay 20, 03:15 UTC6h 55m
2026-05-17 KLM856 ICN → AMS May 17, 14:55 UTCMay 18, 02:45 UTC11h 50m
2026-05-17 KLM856 ICN → AMS May 17, 13:45 UTCMay 17, 14:01 UTC15m
2026-05-16 KLM855 AMS → ICN May 16, 19:40 UTCMay 17, 07:10 UTC11h 30m
2026-05-14 KLM751 GYE → AMS May 14, 16:40 UTCMay 15, 11:00 UTC18h 20m
2026-05-14 KLM751 GYE → AMS May 14, 09:35 UTCMay 15, 09:30 UTC23h 55m
2026-05-14 KLM751 GYE → AMS May 14, 09:00 UTCMay 15, 02:50 UTC17h 50m
2026-05-13 KLM888 HKG → AMS May 13, 22:50 UTCMay 14, 03:30 UTC4h 40m
2026-05-13 KLM888 HKG → AMS May 13, 14:45 UTCMay 13, 15:00 UTC15m
2026-05-13 KLM887 AMS → HKG May 13, 06:50 UTCMay 13, 07:25 UTC35m
2026-05-12 KLM887 AMS → HKG May 12, 20:01 UTCMay 12, 23:55 UTC3h 55m
2026-05-12 KLM896 PVG → AMS May 12, 12:50 UTCMay 12, 17:35 UTC4h 45m
2026-05-11 KLM896 PVG → AMS May 11, 15:35 UTCMay 12, 15:30 UTC23h 56m
2026-05-11 KLM895 AMS → PVG May 11, 13:35 UTCMay 12, 13:30 UTC23h 56m
2026-05-11 KLM895 AMS → PVG May 11, 13:20 UTCMay 11, 17:30 UTC4h 11m
2026-05-11 KLM741 CTG → AMS May 11, 00:25 UTCMay 11, 08:45 UTC8h 20m
2026-05-10 KLM741 CTG → AMS May 10, 09:35 UTCMay 11, 08:45 UTC23h 10m
2026-05-10 KLM741 CTG → AMS May 10, 09:00 UTCMay 11, 07:30 UTC22h 30m
2026-05-09 KLM810 KUL → AMS May 9, 19:00 UTCMay 10, 04:50 UTC9h 50m
2026-05-09 KLM810 KUL → AMS May 9, 16:25 UTCMay 9, 16:45 UTC20m
2026-05-09 KLM810 KUL → AMS May 9, 12:50 UTCMay 9, 14:25 UTC1h 35m
2026-05-09 KLM809 AMS → KUL May 9, 09:25 UTCMay 9, 11:00 UTC1h 35m
2026-05-09 KLM809 AMS → KUL May 9, 07:05 UTCMay 9, 07:25 UTC20m
2026-05-08 KLM809 AMS → KUL May 8, 19:50 UTCMay 9, 04:35 UTC8h 45m
2026-05-08 KLM898 PEK → AMS May 8, 10:29 UTCMay 8, 15:10 UTC4h 40m
2026-05-08 KLM897 AMS → PEK May 8, 00:14 UTCMay 8, 00:34 UTC20m
2026-05-07 KLM897 AMS → PEK May 7, 14:15 UTCMay 7, 18:25 UTC4h 10m

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 .

Mode-S 4851AE frequently asked

What is Mode-S code 4851AE?
4851AE is an ICAO 24-bit transponder address. Allocated to Netherlands. Assigned to PH-BHC.
Where is Mode-S 4851AE registered?
Mode-S code 4851AE is allocated to Netherlands (NL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4851AE broadcasting right now?
Yes. Mode-S 4851AE is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4851AE, octal 22050656, decimal 4,739,502.
What flights does 4851AE operate?
Mode-S 4851AE has broadcast 20 distinct callsigns, including KLM296, KLM225, KLM810, KLM809, KLM643.