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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 Jul 26, 21:00 UTC
Flights observed
239
Distinct callsigns
20
Country
NL
Last broadcast
Jul 26, 21:00 UTC

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 39 2026-07-26
KLM810 KLM Royal Dutch Airlines 24 2026-07-26
KLM751 - 16 2026-06-25
KLM856 KLM Royal Dutch Airlines 13 2026-07-22
KLM855 - 13 2026-07-21
KLM896 KLM Royal Dutch Airlines 11 2026-07-24
KLM749 KLM Royal Dutch Airlines 10 2026-07-23
KLM898 - 8 2026-07-21
KLM897 KLM Royal Dutch Airlines 8 2026-07-20
KLM888 - 6 2026-07-10
KLM887 - 6 2026-07-10
KLM868 - 6 2026-07-12
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
KLM655 - 6 2026-07-06
KLM250 - 6 2026-07-06
KLM895 KLM Royal Dutch Airlines 5 2026-07-24
KLM867 - 5 2026-07-11
KLM755 KLM Royal Dutch Airlines 5 2026-07-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KLM810 KUL → AMS Jul 26, 16:20 UTCJul 26, 21:00 UTC4h 40m
2026-07-26 KLM810 KUL → AMS Jul 26, 13:25 UTCJul 26, 14:30 UTC1h 5m
2026-07-26 KLM809 AMS → KUL Jul 26, 10:50 UTCJul 26, 11:05 UTC15m
2026-07-26 KLM809 AMS → KUL Jul 26, 09:30 UTCJul 26, 10:15 UTC45m
2026-07-25 KLM809 AMS → KUL Jul 25, 19:40 UTCJul 26, 07:25 UTC11h 46m
2026-07-24 KLM896 PVG → AMS Jul 24, 23:10 UTCJul 25, 17:00 UTC17h 50m
2026-07-24 KLM896 PVG → AMS Jul 24, 17:25 UTCJul 25, 17:00 UTC23h 35m
2026-07-24 KLM896 PVG → AMS Jul 24, 15:20 UTCJul 25, 15:15 UTC23h 55m
2026-07-24 KLM895 AMS → PVG Jul 24, 13:40 UTCJul 25, 13:15 UTC23h 35m
2026-07-23 KLM749 CTG → AMS Jul 23, 23:30 UTCJul 24, 08:55 UTC9h 25m
2026-07-23 KLM749 CTG → AMS Jul 23, 21:25 UTCJul 23, 22:00 UTC35m
2026-07-23 KLM749 CTG → AMS Jul 23, 18:20 UTCJul 23, 18:45 UTC25m
2026-07-23 KLM749 CTG → AMS Jul 23, 09:05 UTCJul 23, 17:35 UTC8h 30m
2026-07-22 KLM856 ICN → AMS Jul 22, 15:05 UTCJul 23, 02:50 UTC11h 45m
2026-07-22 KLM856 ICN → AMS Jul 22, 13:55 UTCJul 22, 14:15 UTC20m
2026-07-21 KLM855 - Jul 21, 20:00 UTCJul 21, 23:50 UTC3h 50m
2026-07-21 KLM898 - Jul 21, 10:15 UTCJul 21, 15:00 UTC4h 45m
2026-07-20 KLM897 AMS → PEK Jul 20, 23:55 UTCJul 21, 00:15 UTC20m
2026-07-20 KLM897 AMS → PEK Jul 20, 14:30 UTCJul 20, 18:20 UTC3h 50m
2026-07-19 KLM755 GYE → AMS Jul 19, 18:30 UTCJul 20, 11:20 UTC16h 50m
2026-07-19 KLM755 GYE → AMS Jul 19, 08:45 UTCJul 20, 02:35 UTC17h 50m
2026-07-17 KLM856 ICN → AMS Jul 17, 15:00 UTCJul 18, 03:05 UTC12h 6m
2026-07-17 KLM856 ICN → AMS Jul 17, 13:50 UTCJul 17, 14:10 UTC20m
2026-07-17 KLM855 - Jul 17, 06:35 UTCJul 17, 06:54 UTC20m
2026-07-16 KLM855 - Jul 16, 20:05 UTCJul 17, 05:39 UTC9h 35m
2026-07-16 KLM862 - Jul 16, 03:30 UTCJul 16, 17:05 UTC13h 35m
2026-07-15 KLM861 - Jul 15, 12:15 UTCJul 16, 00:20 UTC12h 5m
2026-07-13 KLM810 - Jul 13, 16:20 UTCJul 14, 04:35 UTC12h 15m
2026-07-13 KLM810 - Jul 13, 13:25 UTCJul 13, 14:35 UTC1h 10m
2026-07-13 KLM809 - Jul 13, 10:45 UTCJul 13, 11:00 UTC15m
2026-07-13 KLM809 - Jul 13, 09:25 UTCJul 13, 10:10 UTC45m
2026-07-13 KLM809 - Jul 13, 07:10 UTCJul 13, 07:45 UTC35m
2026-07-12 KLM809 - Jul 12, 19:50 UTCJul 13, 06:25 UTC10h 35m
2026-07-12 KLM868 - Jul 12, 03:20 UTCJul 12, 17:01 UTC13h 40m
2026-07-11 KLM867 AMS → KIX Jul 11, 13:05 UTCJul 12, 01:00 UTC11h 55m
2026-07-10 KLM888 - Jul 10, 23:00 UTCJul 11, 03:50 UTC4h 50m
2026-07-10 KLM888 - Jul 10, 14:45 UTCJul 10, 15:00 UTC15m
2026-07-10 KLM887 - Jul 10, 06:25 UTCJul 10, 06:50 UTC25m
2026-07-09 KLM887 - Jul 9, 19:55 UTCJul 9, 23:45 UTC3h 50m
2026-07-09 KLM862 - Jul 9, 03:30 UTCJul 9, 17:00 UTC13h 30m
2026-07-08 KLM861 - Jul 8, 12:25 UTCJul 9, 00:40 UTC12h 15m
2026-07-08 KLM100 - Jul 8, 02:20 UTCJul 8, 09:05 UTC6h 45m
2026-07-07 KLM695 - Jul 7, 16:05 UTCJul 7, 23:30 UTC7h 25m
2026-07-06 KLM250 - Jul 6, 20:45 UTCJul 7, 03:50 UTC7h 5m
2026-07-06 KLM655 AMS → MSP Jul 6, 09:10 UTCJul 6, 17:20 UTC8h 10m
2026-07-05 KLM888 - Jul 5, 23:00 UTCJul 6, 03:55 UTC4h 55m
2026-07-05 KLM888 - Jul 5, 14:45 UTCJul 5, 15:00 UTC15m
2026-07-05 KLM887 - Jul 5, 06:35 UTCJul 5, 07:05 UTC30m
2026-07-04 KLM887 - Jul 4, 19:55 UTCJul 4, 23:45 UTC3h 50m
2026-07-03 KLM296 - Jul 3, 22:10 UTCJul 4, 04:45 UTC6h 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-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 Jul 26, 21:00 UTC.
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, KLM856, KLM855.