Apparatus

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sensors Mode-S transponder

4855D1

ICAO 24-bit transponder address · allocated to Netherlands

Currently assigned to PH-EXO · EMBRAER ERJ-170-200 (long wing)

Hex
4855D1
Octal
22052721
Decimal
4,740,561
Country
NL
Tail
PH-EXO
Type
E75L
No current signal · last broadcast 2h ago
Flights observed
358
Distinct callsigns
20
Country
NL
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4855D1.

Country allocation

The ICAO 24-bit address 4855D1 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
KLM1988 KLM Royal Dutch Airlines 8 2026-05-08
KLM42X KLM Royal Dutch Airlines 7 2026-05-20
KLM21A KLM Royal Dutch Airlines 7 2026-05-20
KLM87D KLM Royal Dutch Airlines 6 2026-05-29
KLM86N KLM Royal Dutch Airlines 6 2026-05-22
KLM974 KLM Royal Dutch Airlines 5 2026-05-20
KLM81M KLM Royal Dutch Airlines 5 2026-05-20
KLM62W KLM Royal Dutch Airlines 5 2026-05-29
KLM37X KLM Royal Dutch Airlines 5 2026-05-22
KLM1991 KLM Royal Dutch Airlines 5 2026-04-26
KLM1124 KLM Royal Dutch Airlines 5 2026-05-28
KLM1123 KLM Royal Dutch Airlines 5 2026-05-28
KLM948 KLM Royal Dutch Airlines 4 2026-05-15
KLM947 KLM Royal Dutch Airlines 4 2026-05-15
KLM26U KLM Royal Dutch Airlines 4 2026-05-19
KLM21M KLM Royal Dutch Airlines 4 2026-05-18
KLM20D KLM Royal Dutch Airlines 4 2026-05-26
KLM1713 KLM Royal Dutch Airlines 4 2026-05-26
KLM1330 KLM Royal Dutch Airlines 4 2026-05-21
KLM1329 KLM Royal Dutch Airlines 4 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 KLM72B PRG → AMS May 30, 19:20 UTCMay 30, 20:30 UTC1h 10m
2026-05-30 KLM75R AMS → PRG May 30, 17:25 UTCMay 30, 18:35 UTC1h 10m
2026-05-30 KLM24V ZRH → AMS May 30, 13:25 UTCMay 30, 14:30 UTC1h 5m
2026-05-30 KLM1921 AMS → GDN May 30, 11:40 UTCMay 30, 12:35 UTC55m
2026-05-30 KLM92M NUE → AMS May 30, 08:20 UTCMay 30, 09:20 UTC1h 0m
2026-05-30 KLM25X AMS → NUE May 30, 06:35 UTCMay 30, 07:30 UTC55m
2026-05-29 KLM36D BHX → AMS May 29, 19:35 UTCMay 29, 20:20 UTC45m
2026-05-29 KLM51D AMS → BHX May 29, 17:50 UTCMay 29, 18:50 UTC1h 0m
2026-05-29 KLM62W AES → AMS May 29, 15:05 UTCMay 29, 16:45 UTC1h 40m
2026-05-29 KLM87D AMS → MAD May 29, 12:40 UTCMay 29, 14:00 UTC1h 20m
2026-05-29 KLM94Q SVG → AMS May 29, 10:15 UTCMay 29, 11:35 UTC1h 20m
2026-05-29 KLM15L AMS → SVG May 29, 08:10 UTCMay 29, 09:30 UTC1h 20m
2026-05-29 KLM58G BUD → AMS May 29, 06:40 UTCMay 29, 07:05 UTC25m
2026-05-29 KLM89W AMS → BRU May 29, 05:20 UTCMay 29, 05:50 UTC30m
2026-05-28 KLM36D BHX → AMS May 28, 19:15 UTCMay 28, 20:00 UTC45m
2026-05-28 KLM51D AMS → BHX May 28, 17:45 UTCMay 28, 18:35 UTC50m
2026-05-28 KLM62W AES → AMS May 28, 15:05 UTCMay 28, 16:40 UTC1h 35m
2026-05-28 KLM87D AMS → MAD May 28, 12:35 UTCMay 28, 14:10 UTC1h 35m
2026-05-28 KLM1124 CPH → AMS May 28, 10:00 UTCMay 28, 11:25 UTC1h 25m
2026-05-28 KLM1123 AMS → ORK May 28, 07:55 UTCMay 28, 09:25 UTC1h 30m
2026-05-28 KLM58G BUD → AMS May 28, 06:25 UTCMay 28, 06:50 UTC25m
2026-05-28 KLM89W AMS → BRU May 28, 05:15 UTCMay 28, 05:45 UTC30m
2026-05-27 KLM1016 LHR → AMS May 27, 20:05 UTCMay 27, 20:50 UTC45m
2026-05-27 KLM89H AMS → LHR May 27, 17:20 UTCMay 27, 18:20 UTC1h 0m
2026-05-27 KLM1034 LPL → AMS May 27, 13:05 UTCMay 27, 13:55 UTC50m
2026-05-27 KLM89A AMS → CAG May 27, 11:10 UTCMay 27, 12:10 UTC1h 0m
2026-05-27 KLM68G BRE → AMS May 27, 09:20 UTCMay 27, 10:05 UTC45m
2026-05-27 KLM1761 AMS → BRE May 27, 07:55 UTCMay 27, 08:35 UTC40m
2026-05-27 KLM900 INV → AMS May 27, 05:35 UTCMay 27, 06:49 UTC1h 15m
2026-05-26 KLM53C AMS → GVA May 26, 20:09 UTCMay 26, 21:25 UTC1h 15m
2026-05-26 KLM20D STR → AMS May 26, 16:45 UTCMay 26, 17:20 UTC35m
2026-05-26 KLM1713 AMS → LUX May 26, 15:29 UTCMay 26, 16:00 UTC30m
2026-05-26 KLM1646 FLR → AMS May 26, 12:40 UTCMay 26, 14:05 UTC1h 25m
2026-05-26 KLM37M AMS → GOA May 26, 10:10 UTCMay 26, 11:39 UTC1h 30m
2026-05-26 KLM48F MAN → AMS May 26, 08:15 UTCMay 26, 09:09 UTC55m
2026-05-26 KLM41N AMS → BLQ May 26, 06:14 UTCMay 26, 07:10 UTC55m
2026-05-25 KLM36D BHX → AMS May 25, 19:30 UTCMay 25, 20:15 UTC45m
2026-05-25 KLM51D AMS → BHX May 25, 17:45 UTCMay 25, 18:40 UTC55m
2026-05-25 KLM62W AES → AMS May 25, 15:10 UTCMay 25, 16:50 UTC1h 40m
2026-05-25 KLM87D AMS → MAD May 25, 12:40 UTCMay 25, 14:10 UTC1h 30m
2026-05-25 KLM1124 CPH → AMS May 25, 10:20 UTCMay 25, 11:40 UTC1h 20m
2026-05-25 KLM1123 AMS → ORK May 25, 08:10 UTCMay 25, 09:30 UTC1h 20m
2026-05-25 KLM32D YYZ → AMS May 25, 04:55 UTCMay 25, 06:40 UTC1h 45m
2026-05-24 KLM77A AMS → MAD May 24, 19:25 UTCMay 24, 20:55 UTC1h 30m
2026-05-24 KLM20D STR → AMS May 24, 16:45 UTCMay 24, 17:25 UTC40m
2026-05-24 KLM1713 AMS → LUX May 24, 15:15 UTCMay 24, 15:55 UTC40m
2026-05-24 KLM78M BSL → AMS May 24, 13:05 UTCMay 24, 14:00 UTC55m
2026-05-24 KLM1945 AMS → BSL May 24, 11:25 UTCMay 24, 12:20 UTC55m
2026-05-24 KLM1788 HAJ → AMS May 24, 09:00 UTCMay 24, 09:40 UTC40m
2026-05-24 KLM1787 AMS → HAJ May 24, 07:40 UTCMay 24, 08:15 UTC35m

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

Mode-S 4855D1 frequently asked

What is Mode-S code 4855D1?
4855D1 is an ICAO 24-bit transponder address. Allocated to Netherlands. Assigned to PH-EXO.
Where is Mode-S 4855D1 registered?
Mode-S code 4855D1 is allocated to Netherlands (NL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4855D1 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4855D1, octal 22052721, decimal 4,740,561.
What flights does 4855D1 operate?
Mode-S 4855D1 has broadcast 20 distinct callsigns, including KLM1988, KLM42X, KLM21A, KLM87D, KLM86N.