Apparatus

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sensors Mode-S transponder

4851AD

ICAO 24-bit transponder address · allocated to Netherlands

Currently assigned to PH-BHA · BOEING 787-9 Dreamliner

Hex
4851AD
Octal
22050655
Decimal
4,739,501
Country
NL
Tail
PH-BHA
Type
B789
No current signal · last broadcast 3h ago
Flights observed
118
Distinct callsigns
20
Country
NL
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 4851AD.

Country allocation

The ICAO 24-bit address 4851AD 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 2026-05-18
KLM810 KLM Royal Dutch Airlines 16 2026-05-18
KLM751 KLM Royal Dutch Airlines 11 2026-05-23
KLM898 KLM Royal Dutch Airlines 6 2026-05-25
KLM896 KLM Royal Dutch Airlines 6 2026-04-29
KLM808 KLM Royal Dutch Airlines 6 2026-05-26
KLM807 KLM Royal Dutch Airlines 6 2026-05-26
KLM789 KLM Royal Dutch Airlines 6 2026-05-02
KLM897 KLM Royal Dutch Airlines 4 2026-05-24
KLM755 KLM Royal Dutch Airlines 3 2026-04-20
KLM895 KLM Royal Dutch Airlines 2 2026-04-28
KLM868 KLM Royal Dutch Airlines 2 2026-05-09
KLM867 KLM Royal Dutch Airlines 2 2026-05-08
KLM856 KLM Royal Dutch Airlines 2 2026-05-06
KLM855 KLM Royal Dutch Airlines 2 2026-05-05
KLM759 KLM Royal Dutch Airlines 2 2026-04-27
KLM655 KLM Royal Dutch Airlines 2 2026-05-03
KLM250 KLM Royal Dutch Airlines 2 2026-05-03
KLM166 KLM Royal Dutch Airlines 2 2026-05-28
KLM115 KLM Royal Dutch Airlines 2 2026-05-28

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 KLM862 NRT → AMS May 30, 03:30 UTCMay 30, 09:30 UTC6h 0m
2026-05-29 KLM861 AMS → NRT May 29, 12:10 UTCMay 30, 00:25 UTC12h 15m
2026-05-28 KLM166 - May 28, 23:25 UTCMay 29, 08:25 UTC9h 0m
2026-05-28 KLM115 LEY → LEY May 28, 11:05 UTCMay 28, 20:30 UTC9h 25m
2026-05-26 KLM808 TPE → AMS May 26, 16:30 UTCMay 27, 06:09 UTC13h 40m
2026-05-26 KLM808 TPE → AMS May 26, 12:35 UTCMay 26, 14:30 UTC1h 55m
2026-05-26 KLM807 AMS → MNL May 26, 08:19 UTCMay 26, 10:10 UTC1h 50m
2026-05-25 KLM807 AMS → MNL May 25, 18:30 UTCMay 26, 06:44 UTC12h 15m
2026-05-25 KLM898 PEK → AMS May 25, 10:35 UTCMay 25, 15:05 UTC4h 30m
2026-05-24 KLM898 PEK → AMS May 24, 15:20 UTCMay 25, 15:05 UTC23h 45m
2026-05-24 KLM897 AMS → PEK May 24, 14:15 UTCMay 25, 13:15 UTC23h 0m
2026-05-23 KLM751 GYE → AMS May 23, 16:30 UTCMay 24, 10:45 UTC18h 15m
2026-05-23 KLM751 GYE → AMS May 23, 09:20 UTCMay 24, 09:15 UTC23h 55m
2026-05-23 KLM751 GYE → AMS May 23, 08:45 UTCMay 24, 02:40 UTC17h 56m
2026-05-22 KLM808 TPE → AMS May 22, 16:15 UTCMay 23, 05:35 UTC13h 19m
2026-05-22 KLM808 TPE → AMS May 22, 12:30 UTCMay 22, 14:25 UTC1h 55m
2026-05-22 KLM807 AMS → MNL May 22, 08:30 UTCMay 22, 10:30 UTC2h 0m
2026-05-21 KLM807 AMS → MNL May 21, 18:20 UTCMay 22, 06:45 UTC12h 25m
2026-05-21 KLM898 PEK → AMS May 21, 10:25 UTCMay 21, 14:50 UTC4h 25m
2026-05-20 KLM897 AMS → PEK May 20, 23:55 UTCMay 21, 00:15 UTC20m
2026-05-20 KLM897 AMS → PEK May 20, 13:55 UTCMay 20, 18:10 UTC4h 15m
2026-05-20 KLM751 GYE → AMS May 20, 03:00 UTCMay 20, 10:40 UTC7h 41m
2026-05-19 KLM751 GYE → AMS May 19, 09:20 UTCMay 20, 03:20 UTC18h 0m
2026-05-19 KLM751 GYE → AMS May 19, 08:35 UTCMay 20, 03:20 UTC18h 45m
2026-05-18 KLM810 KUL → AMS May 18, 20:10 UTCMay 19, 04:30 UTC8h 20m
2026-05-18 KLM810 KUL → AMS May 18, 12:40 UTCMay 18, 14:15 UTC1h 35m
2026-05-18 KLM809 AMS → KUL May 18, 09:20 UTCMay 18, 11:00 UTC1h 40m
2026-05-18 KLM809 AMS → KUL May 18, 07:10 UTCMay 18, 07:30 UTC20m
2026-05-17 KLM809 AMS → KUL May 17, 19:50 UTCMay 18, 03:25 UTC7h 35m
2026-05-17 KLM898 PEK → AMS May 17, 10:15 UTCMay 17, 15:01 UTC4h 45m
2026-05-16 KLM898 PEK → AMS May 16, 17:55 UTCMay 17, 15:01 UTC21h 5m
2026-05-16 KLM898 PEK → AMS May 16, 15:20 UTCMay 17, 15:01 UTC23h 40m
2026-05-16 KLM897 AMS → PEK May 16, 14:05 UTCMay 17, 13:15 UTC23h 10m
2026-05-15 KLM808 TPE → AMS May 15, 16:05 UTCMay 16, 05:46 UTC13h 41m
2026-05-15 KLM808 TPE → AMS May 15, 12:15 UTCMay 15, 13:55 UTC1h 40m
2026-05-15 KLM807 AMS → MNL May 15, 08:30 UTCMay 15, 10:15 UTC1h 45m
2026-05-14 KLM807 AMS → MNL May 14, 18:45 UTCMay 15, 06:45 UTC12h 0m
2026-05-14 KLM686 MEX → AMS May 14, 02:35 UTCMay 14, 12:30 UTC9h 55m
2026-05-13 KLM685 AMS → MEX May 13, 12:40 UTCMay 13, 23:45 UTC11h 5m
2026-05-12 KLM640 AMS → JFK May 12, 21:10 UTCMay 13, 07:05 UTC9h 55m
2026-05-12 KLM639 JFK → AMS May 12, 08:10 UTCMay 12, 18:45 UTC10h 35m
2026-05-12 KLM296 YHZ → AMS May 12, 03:35 UTCMay 12, 05:15 UTC1h 40m
2026-05-11 KLM225 AMS → IAD May 11, 11:35 UTCMay 11, 19:40 UTC8h 6m
2026-05-09 KLM868 KIX → AMS May 9, 03:20 UTCMay 9, 16:40 UTC13h 20m
2026-05-08 KLM867 AMS → KIX May 8, 12:44 UTCMay 9, 00:50 UTC12h 5m
2026-05-07 KLM166 - May 7, 23:24 UTCMay 8, 08:09 UTC8h 45m
2026-05-07 KLM115 LEY → LEY May 7, 11:00 UTCMay 7, 21:05 UTC10h 5m
2026-05-06 KLM856 ICN → AMS May 6, 22:20 UTCMay 7, 03:00 UTC4h 40m
2026-05-06 KLM856 ICN → AMS May 6, 13:45 UTCMay 6, 14:00 UTC15m
2026-05-05 KLM855 AMS → ICN May 5, 20:10 UTCMay 6, 06:15 UTC10h 5m

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-BHA page for operator, model, and routing details .

Mode-S 4851AD frequently asked

What is Mode-S code 4851AD?
4851AD is an ICAO 24-bit transponder address. Allocated to Netherlands. Assigned to PH-BHA.
Where is Mode-S 4851AD registered?
Mode-S code 4851AD is allocated to Netherlands (NL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4851AD broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4851AD, octal 22050655, decimal 4,739,501.
What flights does 4851AD operate?
Mode-S 4851AD has broadcast 20 distinct callsigns, including KLM809, KLM810, KLM751, KLM898, KLM896.