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sensors Mode-S transponder

4851B3

ICAO 24-bit transponder address · allocated to Netherlands

Currently assigned to PH-BVP · BOEING 777-300ER

Hex
4851B3
Octal
22050663
Decimal
4,739,507
Country
NL
Tail
PH-BVP
Type
B77W
No current signal · last broadcast 6h ago
Flights observed
171
Distinct callsigns
20
Country
NL
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 4851B3.

Country allocation

The ICAO 24-bit address 4851B3 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
KLM836 - 13 2026-07-12
KLM226 - 13 2026-07-01
KLM835 - 10 2026-07-12
KLM592 - 10 2026-07-13
KLM591 - 10 2026-07-13
KLM219 - 10 2026-06-30
KLM744 - 9 2026-07-05
KLM743 - 8 2026-07-05
KLM248 KLM Royal Dutch Airlines 7 2026-06-11
KLM207 - 6 2026-07-03
KLM792 - 5 2026-06-21
KLM791 KLM Royal Dutch Airlines 5 2026-06-20
KLM758 - 5 2026-06-24
KLM646 - 5 2026-07-04
KLM268 KLM Royal Dutch Airlines 5 2026-05-10
KLM133 - 5 2026-06-10
KLM590 - 4 2026-07-01
KLM105 KLM Royal Dutch Airlines 4 2026-05-14
KLM862 KLM Royal Dutch Airlines 3 2026-05-13
KLM861 KLM Royal Dutch Airlines 3 2026-05-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 KLM592 - Jul 13, 21:40 UTCJul 14, 08:05 UTC10h 25m
2026-07-13 KLM591 - Jul 13, 09:05 UTCJul 13, 19:10 UTC10h 5m
2026-07-12 KLM836 - Jul 12, 17:20 UTCJul 13, 05:55 UTC12h 35m
2026-07-12 KLM836 - Jul 12, 15:05 UTCJul 12, 15:15 UTC10m
2026-07-12 KLM835 - Jul 12, 09:15 UTCJul 12, 09:25 UTC10m
2026-07-11 KLM835 - Jul 11, 19:30 UTCJul 12, 07:20 UTC11h 50m
2026-07-11 KLM844 - Jul 11, 05:25 UTCJul 11, 17:00 UTC11h 35m
2026-07-10 KLM843 - Jul 10, 15:25 UTCJul 11, 01:40 UTC10h 15m
2026-07-09 KLM592 - Jul 9, 21:25 UTCJul 10, 08:05 UTC10h 40m
2026-07-09 KLM591 - Jul 9, 08:55 UTCJul 9, 19:00 UTC10h 5m
2026-07-08 KLM836 - Jul 8, 17:15 UTCJul 9, 05:55 UTC12h 40m
2026-07-08 KLM836 SIN → AMS Jul 8, 15:00 UTCJul 8, 15:10 UTC10m
2026-07-07 KLM835 - Jul 7, 19:30 UTCJul 8, 07:10 UTC11h 40m
2026-07-07 KLM898 - Jul 7, 10:25 UTCJul 7, 15:10 UTC4h 45m
2026-07-07 KLM898 - Jul 7, 03:30 UTCJul 7, 03:40 UTC10m
2026-07-07 KLM897 - Jul 7, 00:05 UTCJul 7, 00:25 UTC20m
2026-07-06 KLM897 - Jul 6, 14:30 UTCJul 6, 18:25 UTC3h 55m
2026-07-05 KLM744 - Jul 5, 22:55 UTCJul 6, 10:20 UTC11h 25m
2026-07-05 KLM743 - Jul 5, 08:20 UTCJul 5, 19:55 UTC11h 35m
2026-07-05 KLM174 - Jul 5, 02:10 UTCJul 5, 05:45 UTC3h 35m
2026-07-05 KLM174 - Jul 5, 01:15 UTCJul 5, 01:55 UTC40m
2026-07-04 KLM565 - Jul 4, 10:50 UTCJul 4, 14:35 UTC3h 45m
2026-07-04 KLM646 - Jul 4, 00:00 UTCJul 4, 06:15 UTC6h 15m
2026-07-03 KLM207 - Jul 3, 13:30 UTCJul 3, 20:55 UTC7h 25m
2026-07-02 KLM744 - Jul 2, 23:00 UTCJul 3, 10:25 UTC11h 25m
2026-07-02 KLM743 - Jul 2, 08:35 UTCJul 2, 20:10 UTC11h 35m
2026-07-01 KLM590 - Jul 1, 14:00 UTCJul 2, 04:50 UTC14h 50m
2026-07-01 KLM226 - Jul 1, 01:15 UTCJul 1, 10:00 UTC8h 45m
2026-06-30 KLM219 AMS → YVR Jun 30, 14:00 UTCJun 30, 22:55 UTC8h 55m
2026-06-30 KLM226 - Jun 30, 01:04 UTCJun 30, 09:55 UTC8h 51m
2026-06-29 KLM219 - Jun 29, 13:49 UTCJun 29, 22:39 UTC8h 50m
2026-06-29 KLM226 - Jun 29, 01:00 UTCJun 29, 09:54 UTC8h 55m
2026-06-28 KLM219 AMS → YVR Jun 28, 13:45 UTCJun 28, 22:20 UTC8h 35m
2026-06-27 KLM744 - Jun 27, 19:24 UTCJun 28, 10:30 UTC15h 5m
2026-06-27 KLM743 - Jun 27, 08:44 UTCJun 28, 02:39 UTC17h 55m
2026-06-25 KLM589 - Jun 25, 13:45 UTCJun 26, 04:39 UTC14h 55m
2026-06-24 KLM758 - Jun 24, 20:05 UTCJun 25, 10:15 UTC14h 10m
2026-06-24 KLM758 - Jun 24, 12:50 UTCJun 25, 10:15 UTC21h 25m
2026-06-24 KLM758 AMS → AMS Jun 24, 11:39 UTCJun 25, 10:15 UTC22h 35m
2026-06-23 KLM592 - Jun 23, 21:29 UTCJun 24, 07:54 UTC10h 25m
2026-06-23 KLM591 AMS → JNB Jun 23, 09:09 UTCJun 23, 19:10 UTC10h 0m
2026-06-22 KLM836 SIN → AMS Jun 22, 17:40 UTCJun 23, 06:09 UTC12h 30m
2026-06-22 KLM836 SIN → AMS Jun 22, 15:35 UTCJun 22, 15:45 UTC10m
2026-06-21 KLM835 - Jun 21, 19:45 UTCJun 22, 07:30 UTC11h 45m
2026-06-21 KLM792 - Jun 21, 01:05 UTCJun 21, 11:59 UTC10h 55m
2026-06-20 KLM791 AMS → GRU Jun 20, 11:34 UTCJun 20, 15:14 UTC3h 40m
2026-06-20 KLM646 - Jun 20, 00:24 UTCJun 20, 01:44 UTC1h 20m
2026-06-19 KLM207 - Jun 19, 19:04 UTCJun 19, 20:55 UTC1h 50m
2026-06-19 KLM207 - Jun 19, 13:20 UTCJun 19, 14:54 UTC1h 35m
2026-06-18 KLM836 SIN → AMS Jun 18, 17:35 UTCJun 19, 05:59 UTC12h 24m

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

Mode-S 4851B3 frequently asked

What is Mode-S code 4851B3?
4851B3 is an ICAO 24-bit transponder address. Allocated to Netherlands. Assigned to PH-BVP.
Where is Mode-S 4851B3 registered?
Mode-S code 4851B3 is allocated to Netherlands (NL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4851B3 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4851B3, octal 22050663, decimal 4,739,507.
What flights does 4851B3 operate?
Mode-S 4851B3 has broadcast 20 distinct callsigns, including KLM836, KLM226, KLM835, KLM592, KLM591.