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sensors Mode-S transponder

484C51

ICAO 24-bit transponder address · allocated to Netherlands

Currently assigned to PH-EZM · EMBRAER ERJ-190-100

Hex
484C51
Octal
22046121
Decimal
4,738,129
Country
NL
Tail
PH-EZM
Type
E190
Broadcasting now · callsign KLM978 · 21,000 ft
Flights observed
621
Distinct callsigns
20
Country
NL
Last broadcast
1h ago

Current position

484C51 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 484C51 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
KLM66B - 15 2026-06-26
KLM43V - 15 2026-06-26
KLM980 - 11 2026-06-23
KLM21F - 10 2026-06-23
KLM67N - 8 2026-06-27
KLM98C - 7 2026-06-28
KLM86N - 7 2026-06-25
KLM1660 - 7 2026-07-03
KLM37X - 6 2026-06-25
KLM1754 - 6 2026-07-02
KLM1753 - 6 2026-07-02
KLM1667 - 6 2026-07-02
KLM995 KLM Royal Dutch Airlines 5 2026-07-09
KLM98Q - 5 2026-06-25
KLM90N - 5 2026-07-09
KLM60Q - 5 2026-07-07
KLM50W - 5 2026-06-22
KLM47X - 5 2026-07-13
KLM40Q - 5 2026-07-13
KLM37M - 5 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 KLM33C - Jul 14, 05:35 UTCJul 14, 06:15 UTC40m
2026-07-13 KLM88L - Jul 13, 16:15 UTCJul 13, 17:15 UTC1h 0m
2026-07-13 KLM59D AMS → RNS Jul 13, 14:25 UTCJul 13, 15:35 UTC1h 10m
2026-07-13 KLM40Q MUC → AMS Jul 13, 12:15 UTCJul 13, 13:30 UTC1h 15m
2026-07-13 KLM47X AMS → MUC Jul 13, 10:25 UTCJul 13, 11:20 UTC55m
2026-07-13 KLM46Z - Jul 13, 08:25 UTCJul 13, 09:20 UTC55m
2026-07-13 KLM1291 - Jul 13, 06:50 UTCJul 13, 07:35 UTC45m
2026-07-13 KLM1988 - Jul 13, 04:05 UTCJul 13, 05:45 UTC1h 40m
2026-07-12 KLM17B - Jul 12, 19:20 UTCJul 12, 20:45 UTC1h 25m
2026-07-12 KLM48D - Jul 12, 16:45 UTCJul 12, 17:55 UTC1h 10m
2026-07-12 KLM89U - Jul 12, 14:40 UTCJul 12, 15:50 UTC1h 10m
2026-07-12 KLM1832 STR → AMS Jul 12, 12:40 UTCJul 12, 13:40 UTC1h 0m
2026-07-12 KLM57T - Jul 12, 11:01 UTCJul 12, 11:50 UTC50m
2026-07-12 KLM26X - Jul 12, 08:35 UTCJul 12, 09:40 UTC1h 5m
2026-07-12 KLM1283 - Jul 12, 06:55 UTCJul 12, 07:50 UTC55m
2026-07-11 KLM15H - Jul 11, 19:00 UTCJul 11, 20:25 UTC1h 25m
2026-07-11 KLM1552 - Jul 11, 12:20 UTCJul 11, 14:25 UTC2h 5m
2026-07-11 KLM1551 - Jul 11, 08:40 UTCJul 11, 10:55 UTC2h 15m
2026-07-11 KLM66J HAM → AMS Jul 11, 06:35 UTCJul 11, 07:25 UTC50m
2026-07-11 KLM49K - Jul 11, 05:05 UTCJul 11, 05:50 UTC45m
2026-07-10 KLM92Z LBA → AMS Jul 10, 16:50 UTCJul 10, 17:35 UTC45m
2026-07-10 KLM97K - Jul 10, 15:10 UTCJul 10, 16:00 UTC50m
2026-07-10 KLM1646 - Jul 10, 12:30 UTCJul 10, 13:55 UTC1h 25m
2026-07-10 KLM37M - Jul 10, 10:00 UTCJul 10, 11:30 UTC1h 30m
2026-07-10 KLM84B - Jul 10, 04:00 UTCJul 10, 05:25 UTC1h 25m
2026-07-09 KLM1247 AMS → LPI Jul 9, 21:10 UTCJul 9, 22:35 UTC1h 25m
2026-07-09 KLM90N LCY → AMS Jul 9, 19:25 UTCJul 9, 20:10 UTC45m
2026-07-09 KLM995 AMS → LCY Jul 9, 18:05 UTCJul 9, 18:45 UTC40m
2026-07-09 KLM1566 - Jul 9, 14:50 UTCJul 9, 16:45 UTC1h 55m
2026-07-09 KLM1565 - Jul 9, 12:00 UTCJul 9, 14:00 UTC2h 0m
2026-07-09 KLM948 - Jul 9, 09:00 UTCJul 9, 10:10 UTC1h 10m
2026-07-09 KLM947 - Jul 9, 07:00 UTCJul 9, 08:10 UTC1h 10m
2026-07-09 KLM44P FRA → AMS Jul 9, 05:10 UTCJul 9, 06:00 UTC50m
2026-07-08 KLM53T AMS → FRA Jul 8, 19:25 UTCJul 8, 20:05 UTC40m
2026-07-08 KLM56A - Jul 8, 16:35 UTCJul 8, 17:00 UTC25m
2026-07-08 KLM15Z AMS → DUS Jul 8, 15:20 UTCJul 8, 15:45 UTC25m
2026-07-08 KLM1034 MAN → AMS Jul 8, 13:15 UTCJul 8, 14:10 UTC55m
2026-07-08 KLM89A - Jul 8, 11:20 UTCJul 8, 12:10 UTC50m
2026-07-08 KLM1788 HAJ → AMS Jul 8, 09:00 UTCJul 8, 09:40 UTC40m
2026-07-08 KLM1787 - Jul 8, 07:35 UTCJul 8, 08:15 UTC40m
2026-07-08 KLM32D - Jul 8, 04:50 UTCJul 8, 06:15 UTC1h 25m
2026-07-07 KLM77A - Jul 7, 19:20 UTCJul 7, 21:00 UTC1h 40m
2026-07-07 KLM60Q - Jul 7, 17:00 UTCJul 7, 18:20 UTC1h 20m
2026-07-07 KLM61D - Jul 7, 14:45 UTCJul 7, 15:55 UTC1h 10m
2026-07-07 KLM90W BOD → AMS Jul 7, 12:10 UTCJul 7, 13:45 UTC1h 35m
2026-07-07 KLM65B - Jul 7, 09:55 UTCJul 7, 11:15 UTC1h 20m
2026-07-07 KLM978 - Jul 7, 07:15 UTCJul 7, 07:55 UTC40m
2026-07-07 KLM33C - Jul 7, 05:50 UTCJul 7, 06:35 UTC45m
2026-07-06 KLM90N - Jul 6, 20:05 UTCJul 6, 20:45 UTC40m
2026-07-06 KLM995 AMS → LCY Jul 6, 18:40 UTCJul 6, 19:20 UTC40m

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

Mode-S 484C51 frequently asked

What is Mode-S code 484C51?
484C51 is an ICAO 24-bit transponder address. Allocated to Netherlands. Assigned to PH-EZM.
Where is Mode-S 484C51 registered?
Mode-S code 484C51 is allocated to Netherlands (NL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 484C51 broadcasting right now?
Yes. Mode-S 484C51 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 484C51, octal 22046121, decimal 4,738,129.
What flights does 484C51 operate?
Mode-S 484C51 has broadcast 20 distinct callsigns, including KLM66B, KLM43V, KLM980, KLM21F, KLM67N.