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sensors Mode-S transponder

4843F2

ICAO 24-bit transponder address · allocated to Netherlands

Currently assigned to PH-BQO · BOEING 777-200

Hex
4843F2
Octal
22041762
Decimal
4,735,986
Country
NL
Tail
PH-BQO
Type
B772
Broadcasting now · callsign KLM105 · 14,350 ft
Flights observed
185
Distinct callsigns
20
Country
NL
Last broadcast
Jul 26, 22:20 UTC

Current position

4843F2 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4843F2 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
KLM702 - 20 2026-07-15
KLM701 KLM Royal Dutch Airlines 16 2026-07-26
KLM874 - 10 2026-07-07
KLM268 KLM Royal Dutch Airlines 10 2026-07-22
KLM862 KLM Royal Dutch Airlines 9 2026-07-20
KLM878 KLM Royal Dutch Airlines 7 2026-07-25
KLM877 KLM Royal Dutch Airlines 6 2026-07-25
KLM861 - 6 2026-07-19
KLM686 - 6 2026-07-12
KLM685 - 6 2026-07-11
KLM896 KLM Royal Dutch Airlines 5 2026-05-20
KLM610 - 4 2026-07-13
KLM609 - 4 2026-07-12
KLM895 KLM Royal Dutch Airlines 3 2026-05-19
KLM844 - 3 2026-07-14
KLM843 - 3 2026-07-13
KLM661 KLM Royal Dutch Airlines 3 2026-07-23
KLM655 KLM Royal Dutch Airlines 3 2026-07-24
KLM646 - 3 2026-06-30
KLM636 KLM Royal Dutch Airlines 3 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KLM701 AMS → EZE Jul 26, 19:30 UTCJul 26, 22:20 UTC2h 50m
2026-07-25 KLM878 BOM → AMS Jul 25, 20:50 UTCJul 26, 05:40 UTC8h 50m
2026-07-25 KLM877 AMS → BOM Jul 25, 10:00 UTCJul 25, 18:05 UTC8h 5m
2026-07-24 KLM250 AMS → MSP Jul 24, 20:20 UTCJul 25, 03:30 UTC7h 10m
2026-07-24 KLM655 AMS → MSP Jul 24, 09:20 UTCJul 24, 17:35 UTC8h 15m
2026-07-23 KLM192 IAH → AMS Jul 23, 22:20 UTCJul 24, 06:50 UTC8h 30m
2026-07-23 KLM661 AMS → IAH Jul 23, 10:30 UTCJul 23, 20:10 UTC9h 40m
2026-07-22 KLM268 PBM → AMS Jul 22, 10:20 UTCJul 23, 03:55 UTC17h 35m
2026-07-20 KLM862 NRT → AMS Jul 20, 03:25 UTCJul 20, 16:55 UTC13h 30m
2026-07-19 KLM861 AMS → NRT Jul 19, 12:40 UTCJul 20, 00:55 UTC12h 15m
2026-07-18 KLM856 ICN → AMS Jul 18, 14:50 UTCJul 19, 02:55 UTC12h 5m
2026-07-18 KLM856 ICN → AMS Jul 18, 13:40 UTCJul 18, 14:05 UTC25m
2026-07-18 KLM855 - Jul 18, 06:40 UTCJul 18, 07:05 UTC25m
2026-07-17 KLM855 - Jul 17, 20:10 UTCJul 18, 05:50 UTC9h 41m
2026-07-17 KLM868 - Jul 17, 03:10 UTCJul 17, 16:55 UTC13h 45m
2026-07-16 KLM867 AMS → KIX Jul 16, 13:00 UTCJul 17, 00:45 UTC11h 45m
2026-07-15 KLM702 EZE → AMS Jul 15, 18:25 UTCJul 16, 07:05 UTC12h 40m
2026-07-15 KLM702 - Jul 15, 14:35 UTCJul 15, 16:05 UTC1h 30m
2026-07-15 KLM701 - Jul 15, 10:45 UTCJul 15, 11:10 UTC25m
2026-07-14 KLM701 AMS → EZE Jul 14, 19:30 UTCJul 15, 08:45 UTC13h 14m
2026-07-14 KLM844 - Jul 14, 05:25 UTCJul 14, 16:55 UTC11h 30m
2026-07-13 KLM843 - Jul 13, 15:30 UTCJul 14, 02:05 UTC10h 35m
2026-07-13 KLM610 SLC → AMS Jul 13, 04:15 UTCJul 13, 12:50 UTC8h 35m
2026-07-12 KLM609 - Jul 12, 15:50 UTCJul 13, 01:20 UTC9h 30m
2026-07-12 KLM686 - Jul 12, 02:40 UTCJul 12, 12:45 UTC10h 5m
2026-07-11 KLM685 - Jul 11, 12:55 UTCJul 12, 00:15 UTC11h 20m
2026-07-10 KLM104 - Jul 10, 21:15 UTCJul 11, 08:25 UTC11h 10m
2026-07-10 KLM105 AMS → CPT Jul 10, 08:35 UTCJul 10, 19:15 UTC10h 40m
2026-07-09 KLM808 - Jul 9, 16:35 UTCJul 10, 06:10 UTC13h 35m
2026-07-09 KLM808 - Jul 9, 12:45 UTCJul 9, 14:50 UTC2h 5m
2026-07-09 KLM807 - Jul 9, 08:30 UTCJul 9, 10:20 UTC1h 50m
2026-07-08 KLM807 AMS → TPE Jul 8, 18:30 UTCJul 9, 06:35 UTC12h 5m
2026-07-07 KLM874 - Jul 7, 12:35 UTCJul 8, 06:35 UTC18h 0m
2026-07-07 KLM874 - Jul 7, 10:35 UTCJul 8, 06:35 UTC20h 0m
2026-07-07 KLM874 AMS → AMS Jul 7, 10:05 UTCJul 8, 06:35 UTC20h 30m
2026-07-06 KLM878 - Jul 6, 20:45 UTCJul 7, 05:50 UTC9h 5m
2026-07-06 KLM877 AMS → BOM Jul 6, 10:00 UTCJul 6, 18:35 UTC8h 35m
2026-07-05 KLM192 - Jul 5, 21:45 UTCJul 6, 06:05 UTC8h 20m
2026-07-05 KLM661 - Jul 5, 09:45 UTCJul 5, 19:20 UTC9h 35m
2026-07-03 KLM268 - Jul 3, 08:35 UTCJul 4, 03:50 UTC19h 15m
2026-07-03 KLM195 - Jul 3, 07:20 UTCJul 4, 03:50 UTC20h 30m
2026-07-02 KLM296 IAD → AMS Jul 2, 22:30 UTCJul 3, 05:00 UTC6h 30m
2026-07-02 KLM225 AMS → IAD Jul 2, 11:35 UTCJul 2, 19:40 UTC8h 5m
2026-07-02 KLM644 - Jul 2, 01:55 UTCJul 2, 08:10 UTC6h 15m
2026-07-01 KLM643 - Jul 1, 15:55 UTCJul 1, 23:20 UTC7h 25m
2026-07-01 KLM686 - Jul 1, 03:15 UTCJul 1, 13:20 UTC10h 5m
2026-06-30 KLM685 - Jun 30, 12:45 UTCJun 30, 23:50 UTC11h 5m
2026-06-30 KLM646 JFK → AMS Jun 30, 00:04 UTCJun 30, 06:25 UTC6h 20m
2026-06-29 KLM207 - Jun 29, 13:24 UTCJun 29, 20:44 UTC7h 20m
2026-06-29 KLM174 - Jun 29, 01:50 UTCJun 29, 05:30 UTC3h 40m

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

Mode-S 4843F2 frequently asked

What is Mode-S code 4843F2?
4843F2 is an ICAO 24-bit transponder address. Allocated to Netherlands. Assigned to PH-BQO.
Where is Mode-S 4843F2 registered?
Mode-S code 4843F2 is allocated to Netherlands (NL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4843F2 broadcasting right now?
Yes. Mode-S 4843F2 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4843F2, octal 22041762, decimal 4,735,986.
What flights does 4843F2 operate?
Mode-S 4843F2 has broadcast 20 distinct callsigns, including KLM702, KLM701, KLM874, KLM268, KLM862.