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
No current signal · last broadcast 1h ago
Flights observed
202
Distinct callsigns
20
Country
NL
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4851AE.

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 - 23 2026-07-05
KLM810 - 20 2026-07-05
KLM296 KLM Royal Dutch Airlines 15 2026-05-02
KLM225 - 14 2026-05-02
KLM897 - 9 2026-07-13
KLM751 - 9 2026-07-14
KLM888 - 8 2026-07-03
KLM896 - 7 2026-06-21
KLM887 - 7 2026-07-03
KLM755 KLM Royal Dutch Airlines 7 2026-06-08
KLM898 - 5 2026-07-13
KLM643 KLM Royal Dutch Airlines 5 2026-05-19
KLM250 KLM Royal Dutch Airlines 5 2026-04-26
KLM895 - 4 2026-06-21
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
KLM868 - 3 2026-06-19
KLM867 - 3 2026-06-18
KLM789 - 3 2026-06-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KLM751 - Jul 14, 08:40 UTCJul 14, 18:35 UTC9h 55m
2026-07-13 KLM898 - Jul 13, 10:05 UTCJul 13, 14:50 UTC4h 45m
2026-07-13 KLM897 - Jul 13, 00:01 UTCJul 13, 00:20 UTC20m
2026-07-12 KLM897 - Jul 12, 14:30 UTCJul 12, 18:25 UTC3h 55m
2026-07-11 KLM751 - Jul 11, 16:35 UTCJul 12, 10:50 UTC18h 15m
2026-07-11 KLM751 - Jul 11, 09:35 UTCJul 12, 09:30 UTC23h 55m
2026-07-11 KLM751 - Jul 11, 09:00 UTCJul 12, 01:00 UTC16h 0m
2026-07-10 KLM808 - Jul 10, 16:05 UTCJul 11, 05:45 UTC13h 41m
2026-07-10 KLM808 - Jul 10, 12:50 UTCJul 10, 14:25 UTC1h 35m
2026-07-10 KLM807 TPE → MNL Jul 10, 08:05 UTCJul 10, 09:50 UTC1h 45m
2026-07-09 KLM807 - Jul 9, 18:35 UTCJul 10, 06:25 UTC11h 50m
2026-07-09 KLM898 - Jul 9, 10:25 UTCJul 9, 15:10 UTC4h 45m
2026-07-09 KLM898 - Jul 9, 03:20 UTCJul 9, 03:35 UTC15m
2026-07-09 KLM897 - Jul 9, 00:05 UTCJul 9, 00:25 UTC20m
2026-07-08 KLM897 - Jul 8, 14:40 UTCJul 8, 18:35 UTC3h 55m
2026-07-07 KLM751 - Jul 7, 16:30 UTCJul 8, 10:50 UTC18h 20m
2026-07-07 KLM751 - Jul 7, 08:45 UTCJul 8, 03:00 UTC18h 15m
2026-07-06 KLM192 - Jul 6, 20:40 UTCJul 7, 05:15 UTC8h 35m
2026-07-06 KLM661 - Jul 6, 08:30 UTCJul 6, 18:20 UTC9h 50m
2026-07-05 KLM810 - Jul 5, 16:30 UTCJul 6, 04:45 UTC12h 15m
2026-07-05 KLM810 - Jul 5, 12:55 UTCJul 5, 14:30 UTC1h 35m
2026-07-05 KLM809 - Jul 5, 09:25 UTCJul 5, 11:00 UTC1h 35m
2026-07-04 KLM809 - Jul 4, 19:30 UTCJul 5, 07:30 UTC12h 0m
2026-07-03 KLM888 - Jul 3, 22:30 UTCJul 4, 03:20 UTC4h 50m
2026-07-03 KLM888 - Jul 3, 14:35 UTCJul 3, 14:55 UTC20m
2026-07-03 KLM887 - Jul 3, 06:50 UTCJul 3, 07:35 UTC45m
2026-07-02 KLM887 - Jul 2, 19:50 UTCJul 2, 23:35 UTC3h 45m
2026-07-02 KLM862 - Jul 2, 03:30 UTCJul 2, 17:10 UTC13h 40m
2026-07-01 KLM861 AMS → NRT Jul 1, 12:25 UTCJul 2, 01:00 UTC12h 35m
2026-06-30 KLM749 - Jun 30, 23:40 UTCJul 1, 08:35 UTC8h 55m
2026-06-30 KLM749 - Jun 30, 08:15 UTCJun 30, 09:40 UTC1h 25m
2026-06-29 KLM810 - Jun 29, 16:15 UTCJun 30, 04:40 UTC12h 26m
2026-06-29 KLM810 - Jun 29, 12:55 UTCJun 29, 14:34 UTC1h 40m
2026-06-29 KLM809 - Jun 29, 09:34 UTCJun 29, 11:04 UTC1h 30m
2026-06-28 KLM809 - Jun 28, 20:25 UTCJun 29, 08:04 UTC11h 40m
2026-06-27 KLM810 - Jun 27, 16:20 UTCJun 28, 04:40 UTC12h 20m
2026-06-27 KLM810 - Jun 27, 13:00 UTCJun 27, 14:29 UTC1h 30m
2026-06-27 KLM809 - Jun 27, 10:45 UTCJun 27, 11:00 UTC15m
2026-06-27 KLM809 - Jun 27, 09:19 UTCJun 27, 10:10 UTC50m
2026-06-26 KLM809 - Jun 26, 19:39 UTCJun 27, 07:24 UTC11h 45m
2026-06-26 KLM862 - Jun 26, 03:20 UTCJun 26, 16:39 UTC13h 20m
2026-06-25 KLM861 AMS → NRT Jun 25, 12:15 UTCJun 26, 00:45 UTC12h 30m
2026-06-24 KLM789 - Jun 24, 19:39 UTCJun 25, 06:35 UTC10h 55m
2026-06-24 KLM789 - Jun 24, 09:34 UTCJun 25, 06:35 UTC21h 0m
2026-06-24 KLM789 AMS → AMS Jun 24, 08:20 UTCJun 25, 06:35 UTC22h 15m
2026-06-23 KLM810 - Jun 23, 16:29 UTCJun 24, 04:39 UTC12h 10m
2026-06-23 KLM810 - Jun 23, 12:55 UTCJun 23, 14:25 UTC1h 30m
2026-06-23 KLM809 - Jun 23, 10:44 UTCJun 23, 10:59 UTC15m
2026-06-23 KLM809 - Jun 23, 09:20 UTCJun 23, 10:10 UTC50m
2026-06-22 KLM809 - Jun 22, 19:49 UTCJun 23, 07:25 UTC11h 35m

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?
No active broadcast right now. Last signal was 1h ago.
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 KLM809, KLM810, KLM296, KLM225, KLM897.