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
Broadcasting now · callsign KLM66J · 2,625 ft
Flights observed
765
Distinct callsigns
20
Country
NL
Last broadcast
Jul 26, 20:25 UTC

Current position

4855D1 is currently broadcasting. Map zoomed to live position.

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
KLM36K KLM Royal Dutch Airlines 13 2026-07-26
KLM1335 KLM Royal Dutch Airlines 12 2026-07-25
KLM87D - 10 2026-07-02
KLM42X - 10 2026-06-29
KLM21A - 10 2026-06-29
KLM62W - 9 2026-07-02
KLM86N - 8 2026-07-20
KLM51D KLM Royal Dutch Airlines 8 2026-07-23
KLM36D KLM Royal Dutch Airlines 8 2026-07-23
KLM1988 KLM Royal Dutch Airlines 8 2026-05-08
KLM1124 KLM Royal Dutch Airlines 8 2026-07-23
KLM1123 KLM Royal Dutch Airlines 8 2026-07-23
KLM974 - 7 2026-06-18
KLM81M KLM Royal Dutch Airlines 7 2026-06-18
KLM77A - 7 2026-07-16
KLM59J - 7 2026-06-18
KLM57D - 7 2026-07-14
KLM44E KLM Royal Dutch Airlines 7 2026-06-18
KLM37X - 7 2026-07-20
KLM32D - 7 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 KLM15H AMS → GDN Jul 26, 19:10 UTCJul 26, 20:25 UTC1h 15m
2026-07-26 KLM68V NUE → AMS Jul 26, 16:30 UTCJul 26, 17:10 UTC40m
2026-07-26 KLM1791 AMS → HAJ Jul 26, 15:10 UTCJul 26, 15:50 UTC40m
2026-07-26 KLM78M BSL → AMS Jul 26, 12:35 UTCJul 26, 13:40 UTC1h 5m
2026-07-26 KLM1945 AMS → BSL Jul 26, 10:55 UTCJul 26, 11:45 UTC50m
2026-07-26 KLM1174 TRD → AMS Jul 26, 08:15 UTCJul 26, 09:25 UTC1h 10m
2026-07-26 KLM33B AMS → SVG Jul 26, 06:30 UTCJul 26, 07:40 UTC1h 11m
2026-07-26 KLM36K POZ → AMS Jul 26, 04:05 UTCJul 26, 05:25 UTC1h 20m
2026-07-25 KLM1335 AMS → AAL Jul 25, 19:00 UTCJul 25, 20:10 UTC1h 10m
2026-07-25 KLM92Z MAN → AMS Jul 25, 16:40 UTCJul 25, 17:25 UTC45m
2026-07-25 KLM97K AMS → TRN Jul 25, 15:05 UTCJul 25, 15:55 UTC50m
2026-07-25 KLM50X - Jul 25, 12:25 UTCJul 25, 13:35 UTC1h 10m
2026-07-25 KLM65A AMS → GVA Jul 25, 10:25 UTCJul 25, 11:35 UTC1h 10m
2026-07-25 KLM1056 BRS → AMS Jul 25, 08:45 UTCJul 25, 09:20 UTC35m
2026-07-25 KLM79H AMS → NWI Jul 25, 07:25 UTCJul 25, 08:00 UTC35m
2026-07-25 KLM84B LPI → AMS Jul 25, 04:10 UTCJul 25, 05:40 UTC1h 30m
2026-07-24 KLM1247 AMS → KRS Jul 24, 19:55 UTCJul 24, 21:20 UTC1h 25m
2026-07-24 KLM48D BHD → AMS Jul 24, 16:55 UTCJul 24, 18:10 UTC1h 15m
2026-07-24 KLM89U AMS → BHD Jul 24, 14:40 UTCJul 24, 15:50 UTC1h 10m
2026-07-24 KLM30D WRO → AMS Jul 24, 12:20 UTCJul 24, 13:40 UTC1h 20m
2026-07-24 KLM55Z AMS → WRO Jul 24, 10:05 UTCJul 24, 11:15 UTC1h 10m
2026-07-24 KLM70Z PRG → AMS Jul 24, 06:55 UTCJul 24, 08:10 UTC1h 15m
2026-07-24 KLM47C AMS → ZRH Jul 24, 05:05 UTCJul 24, 06:15 UTC1h 10m
2026-07-23 KLM36D BHX → AMS Jul 23, 19:40 UTCJul 23, 20:20 UTC40m
2026-07-23 KLM51D AMS → BHX Jul 23, 17:50 UTCJul 23, 18:35 UTC45m
2026-07-23 KLM1246 CDG → AMS Jul 23, 15:00 UTCJul 23, 16:20 UTC1h 20m
2026-07-23 KLM1245 AMS → CDG Jul 23, 12:45 UTCJul 23, 14:20 UTC1h 35m
2026-07-23 KLM1124 CPH → AMS Jul 23, 10:05 UTCJul 23, 11:30 UTC1h 25m
2026-07-23 KLM1123 AMS → ORK Jul 23, 08:00 UTCJul 23, 09:20 UTC1h 20m
2026-07-23 KLM60Y NWI → AMS Jul 23, 05:20 UTCJul 23, 05:50 UTC30m
2026-07-22 KLM1063 AMS → CWL Jul 22, 20:55 UTCJul 22, 21:25 UTC30m
2026-07-22 KLM44C OPO → AMS Jul 22, 16:55 UTCJul 22, 17:40 UTC45m
2026-07-22 KLM47H AMS → MME Jul 22, 15:20 UTCJul 22, 16:10 UTC50m
2026-07-22 KLM902 SVO → AMS Jul 22, 12:35 UTCJul 22, 13:45 UTC1h 10m
2026-07-22 KLM87J AMS → INV Jul 22, 11:10 UTCJul 22, 11:45 UTC35m
2026-07-22 KLM20Q TRN → AMS Jul 22, 04:10 UTCJul 22, 05:25 UTC1h 15m
2026-07-21 KLM79M AMS → CPH Jul 21, 19:30 UTCJul 21, 20:45 UTC1h 15m
2026-07-21 KLM24P CDG → AMS Jul 21, 16:45 UTCJul 21, 18:15 UTC1h 30m
2026-07-21 KLM1307 AMS → TLS Jul 21, 14:40 UTCJul 21, 16:05 UTC1h 25m
2026-07-21 KLM30D WRO → AMS Jul 21, 12:15 UTCJul 21, 13:35 UTC1h 20m
2026-07-21 KLM55Z - Jul 21, 10:05 UTCJul 21, 11:20 UTC1h 15m
2026-07-21 KLM52R STR → AMS Jul 21, 08:00 UTCJul 21, 09:10 UTC1h 10m
2026-07-21 KLM1229 AMS → CDG Jul 21, 06:00 UTCJul 21, 07:15 UTC1h 15m
2026-07-21 KLM22A MAD → AMS Jul 21, 04:15 UTCJul 21, 04:55 UTC40m
2026-07-20 KLM1793 AMS → HAJ Jul 20, 19:10 UTCJul 20, 19:50 UTC40m
2026-07-20 KLM86N - Jul 20, 16:55 UTCJul 20, 17:55 UTC1h 0m
2026-07-20 KLM37X - Jul 20, 15:15 UTCJul 20, 16:15 UTC1h 0m
2026-07-20 KLM56G OSL → AMS Jul 20, 12:25 UTCJul 20, 13:55 UTC1h 30m
2026-07-20 KLM41B - Jul 20, 10:10 UTCJul 20, 11:35 UTC1h 25m
2026-07-20 KLM70Z PRG → AMS Jul 20, 07:45 UTCJul 20, 08:55 UTC1h 10m

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?
Yes. Mode-S 4855D1 is currently airborne.
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 KLM36K, KLM1335, KLM87D, KLM42X, KLM21A.