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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 Jul 26, 20:50 UTC
Flights observed
192
Distinct callsigns
20
Country
NL
Last broadcast
Jul 26, 20:50 UTC

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
KLM226 KLM Royal Dutch Airlines 14 2026-07-21
KLM836 - 13 2026-07-12
KLM592 KLM Royal Dutch Airlines 11 2026-07-17
KLM591 - 11 2026-07-17
KLM219 KLM Royal Dutch Airlines 11 2026-07-20
KLM835 - 10 2026-07-12
KLM744 - 10 2026-07-19
KLM743 - 9 2026-07-19
KLM248 KLM Royal Dutch Airlines 7 2026-06-11
KLM207 - 6 2026-07-03
KLM844 KLM Royal Dutch Airlines 5 2026-07-22
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
KLM843 KLM Royal Dutch Airlines 4 2026-07-21
KLM590 - 4 2026-07-01
KLM105 KLM Royal Dutch Airlines 4 2026-05-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KLM757 AMS → PTY Jul 26, 11:20 UTCJul 26, 20:50 UTC9h 30m
2026-07-25 KLM188 - Jul 25, 12:50 UTCJul 26, 07:50 UTC19h 1m
2026-07-25 KLM163 - Jul 25, 11:55 UTCJul 26, 07:50 UTC19h 56m
2026-07-25 KLM100 AMS → CHS Jul 25, 02:05 UTCJul 25, 08:35 UTC6h 30m
2026-07-24 KLM695 AMS → YYZ Jul 24, 16:05 UTCJul 24, 23:30 UTC7h 25m
2026-07-22 KLM844 BKK → AMS Jul 22, 12:00 UTCJul 22, 16:45 UTC4h 45m
2026-07-22 KLM844 BKK → AMS Jul 22, 05:15 UTCJul 22, 05:25 UTC10m
2026-07-21 KLM843 BKK → TPE Jul 21, 15:40 UTCJul 22, 02:05 UTC10h 25m
2026-07-21 KLM226 - Jul 21, 01:10 UTCJul 21, 09:45 UTC8h 35m
2026-07-20 KLM219 AMS → YVR Jul 20, 13:35 UTCJul 20, 22:50 UTC9h 15m
2026-07-19 KLM744 - Jul 19, 23:40 UTCJul 20, 10:35 UTC10h 55m
2026-07-19 KLM743 - Jul 19, 08:30 UTCJul 19, 20:05 UTC11h 35m
2026-07-19 KLM174 AMS → NBO Jul 19, 01:45 UTCJul 19, 05:30 UTC3h 45m
2026-07-18 KLM565 - Jul 18, 18:35 UTCJul 18, 18:50 UTC15m
2026-07-18 KLM565 - Jul 18, 11:00 UTCJul 18, 14:25 UTC3h 25m
2026-07-17 KLM592 JNB → AMS Jul 17, 21:44 UTCJul 18, 08:10 UTC10h 26m
2026-07-17 KLM591 - Jul 17, 09:20 UTCJul 17, 19:25 UTC10h 5m
2026-07-16 KLM878 - Jul 16, 21:55 UTCJul 17, 06:20 UTC8h 25m
2026-07-16 KLM877 - Jul 16, 10:04 UTCJul 16, 18:19 UTC8h 15m
2026-07-15 KLM844 - Jul 15, 05:30 UTCJul 15, 16:45 UTC11h 15m
2026-07-14 KLM843 - Jul 14, 15:40 UTCJul 15, 02:15 UTC10h 34m
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

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 Jul 26, 20:50 UTC.
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 KLM226, KLM836, KLM592, KLM591, KLM219.