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sensors Mode-S transponder

484CB4

ICAO 24-bit transponder address · allocated to Netherlands

Currently assigned to PH-BCA · BOEING 737-800

Hex
484CB4
Octal
22046264
Decimal
4,738,228
Country
NL
Tail
PH-BCA
Type
B738
Broadcasting now · callsign KLM23L · 39,000 ft
Flights observed
270
Distinct callsigns
20
Country
NL
Last broadcast
2h ago

Current position

484CB4 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 484CB4 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
KLM99L KLM Royal Dutch Airlines 6 2026-05-29
KLM60H KLM Royal Dutch Airlines 6 2026-05-29
KLM80R KLM Royal Dutch Airlines 5 2026-05-24
KLM74L KLM Royal Dutch Airlines 5 2026-05-18
KLM1579 KLM Royal Dutch Airlines 5 2026-05-18
KLM1377 KLM Royal Dutch Airlines 5 2026-05-23
KLM83A KLM Royal Dutch Airlines 4 2026-05-15
KLM59N KLM Royal Dutch Airlines 4 2026-05-12
KLM57C KLM Royal Dutch Airlines 4 2026-05-15
KLM56W KLM Royal Dutch Airlines 4 2026-05-04
KLM41U KLM Royal Dutch Airlines 4 2026-05-03
KLM1576 KLM Royal Dutch Airlines 4 2026-05-26
KLM1575 KLM Royal Dutch Airlines 4 2026-05-26
KLM1408 KLM Royal Dutch Airlines 4 2026-05-26
KLM1407 KLM Royal Dutch Airlines 4 2026-05-26
KLM1294 KLM Royal Dutch Airlines 4 2026-05-12
KLM961 KLM Royal Dutch Airlines 3 2026-05-24
KLM95P KLM Royal Dutch Airlines 3 2026-05-29
KLM941 KLM Royal Dutch Airlines 3 2026-05-21
KLM83R KLM Royal Dutch Airlines 3 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 KLM34E MUC → AMS May 30, 05:20 UTCMay 30, 06:25 UTC1h 5m
2026-05-29 KLM83R AMS → STR May 29, 19:25 UTCMay 29, 20:30 UTC1h 5m
2026-05-29 KLM60H GLA → AMS May 29, 15:40 UTCMay 29, 17:45 UTC2h 5m
2026-05-29 KLM99L AMS → OPO May 29, 12:05 UTCMay 29, 14:15 UTC2h 10m
2026-05-29 KLM62D SVG → AMS May 29, 09:20 UTCMay 29, 10:25 UTC1h 5m
2026-05-29 KLM95P AMS → PRG May 29, 07:15 UTCMay 29, 08:20 UTC1h 5m
2026-05-29 KLM30N OSL → AMS May 29, 04:35 UTCMay 29, 06:05 UTC1h 30m
2026-05-28 KLM39G AMS → OSL May 28, 19:20 UTCMay 28, 20:50 UTC1h 30m
2026-05-28 KLM28W NCE → AMS May 28, 15:40 UTCMay 28, 18:10 UTC2h 30m
2026-05-28 KLM67Q AMS → AGP May 28, 12:00 UTCMay 28, 14:30 UTC2h 30m
2026-05-28 KLM44A BOD → AMS May 28, 08:50 UTCMay 28, 10:15 UTC1h 25m
2026-05-28 KLM1163 AMS → GOT May 28, 06:35 UTCMay 28, 07:55 UTC1h 20m
2026-05-27 KLM84X BSL → AMS May 27, 15:25 UTCMay 27, 16:40 UTC1h 15m
2026-05-27 KLM89F AMS → BOD May 27, 13:00 UTCMay 27, 14:20 UTC1h 20m
2026-05-27 KLM46C MUC → AMS May 27, 09:30 UTCMay 27, 10:50 UTC1h 20m
2026-05-27 KLM89Q AMS → LIN May 27, 07:10 UTCMay 27, 08:30 UTC1h 20m
2026-05-26 KLM1576 ATH → AMS May 26, 18:24 UTCMay 26, 20:29 UTC2h 5m
2026-05-26 KLM1575 AMS → ATH May 26, 15:05 UTCMay 26, 17:30 UTC2h 25m
2026-05-26 KLM1408 CDG → AMS May 26, 13:10 UTCMay 26, 13:54 UTC45m
2026-05-26 KLM1407 AMS → CDG May 26, 11:00 UTCMay 26, 11:39 UTC40m
2026-05-26 KLM42N GLA → AMS May 26, 08:19 UTCMay 26, 09:25 UTC1h 5m
2026-05-26 KLM61B AMS → GLA May 26, 06:04 UTCMay 26, 07:15 UTC1h 10m
2026-05-25 KLM58L TLS → AMS May 25, 16:55 UTCMay 25, 18:00 UTC1h 5m
2026-05-25 KLM1433 AMS → BHX May 25, 14:40 UTCMay 25, 15:50 UTC1h 10m
2026-05-25 KLM52Q TRN → AMS May 25, 11:10 UTCMay 25, 13:25 UTC2h 15m
2026-05-25 KLM45J AMS → GLA May 25, 07:50 UTCMay 25, 10:00 UTC2h 10m
2026-05-25 KLM66G NCL → AMS May 25, 05:00 UTCMay 25, 05:50 UTC50m
2026-05-24 KLM961 AMS → NCL May 24, 21:15 UTCMay 24, 21:45 UTC30m
2026-05-24 KLM10Y NCE → AMS May 24, 18:00 UTCMay 24, 19:50 UTC1h 50m
2026-05-24 KLM1479 AMS → GLA May 24, 15:05 UTCMay 24, 16:40 UTC1h 35m
2026-05-24 KLM46M ARN → AMS May 24, 12:10 UTCMay 24, 13:45 UTC1h 35m
2026-05-24 KLM91Y AMS → ARN May 24, 09:30 UTCMay 24, 11:05 UTC1h 35m
2026-05-24 KLM80R OTP → AMS May 24, 04:15 UTCMay 24, 06:45 UTC2h 30m
2026-05-23 KLM1377 AMS → OTP May 23, 20:00 UTCMay 23, 22:15 UTC2h 15m
2026-05-23 KLM58K OSL → AMS May 23, 15:40 UTCMay 23, 17:05 UTC1h 25m
2026-05-23 KLM65N AMS → TRF May 23, 13:00 UTCMay 23, 14:20 UTC1h 20m
2026-05-23 KLM54H NCE → AMS May 23, 10:10 UTCMay 23, 11:35 UTC1h 25m
2026-05-23 KLM93W AMS → VCE May 23, 07:40 UTCMay 23, 09:05 UTC1h 25m
2026-05-22 KLM10X NCE → AMS May 22, 15:45 UTCMay 22, 17:20 UTC1h 35m
2026-05-22 KLM41F AMS → NCE May 22, 12:45 UTCMay 22, 14:25 UTC1h 40m
2026-05-22 KLM20H MAD → AMS May 22, 09:50 UTCMay 22, 11:35 UTC1h 45m
2026-05-22 KLM59U AMS → OPO May 22, 07:00 UTCMay 22, 08:40 UTC1h 40m
2026-05-22 KLM1628 MXP → AMS May 22, 04:05 UTCMay 22, 05:40 UTC1h 35m
2026-05-21 KLM43F AMS → NCE May 21, 18:45 UTCMay 21, 20:05 UTC1h 20m
2026-05-21 KLM68B GLA → AMS May 21, 16:10 UTCMay 21, 17:10 UTC1h 0m
2026-05-21 KLM941 AMS → DUB May 21, 13:55 UTCMay 21, 15:10 UTC1h 15m
2026-05-21 KLM86F OSL → AMS May 21, 10:25 UTCMay 21, 11:45 UTC1h 20m
2026-05-21 KLM65M AMS → OSL May 21, 08:00 UTCMay 21, 09:25 UTC1h 25m
2026-05-21 KLM66G NCL → AMS May 21, 05:00 UTCMay 21, 05:50 UTC50m
2026-05-20 KLM961 AMS → NCL May 20, 20:50 UTCMay 20, 21:45 UTC55m

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

Mode-S 484CB4 frequently asked

What is Mode-S code 484CB4?
484CB4 is an ICAO 24-bit transponder address. Allocated to Netherlands. Assigned to PH-BCA.
Where is Mode-S 484CB4 registered?
Mode-S code 484CB4 is allocated to Netherlands (NL). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 484CB4 broadcasting right now?
Yes. Mode-S 484CB4 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 484CB4, octal 22046264, decimal 4,738,228.
What flights does 484CB4 operate?
Mode-S 484CB4 has broadcast 20 distinct callsigns, including KLM99L, KLM60H, KLM80R, KLM74L, KLM1579.