Apparatus

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sensors Mode-S transponder

4CC53B

ICAO 24-bit transponder address

Currently assigned to TF-ICM · BOEING 737 MAX 8

Hex
4CC53B
Octal
23142473
Decimal
5,031,227
Tail
TF-ICM
Type
B38M
No current signal · last broadcast Jul 26, 22:25 UTC
Flights observed
445
Distinct callsigns
20
Country
-
Last broadcast
Jul 26, 22:25 UTC

Last known position

Most recent position reported by Mode-S 4CC53B.

Callsign history 20 distinct

Callsign Airline Flights Last seen
ICE55L Icelandair 16 2026-07-25
ICE11P Icelandair 14 2026-07-20
ICE56K Icelandair 13 2026-07-26
ICE43E - 11 2026-07-12
ICE12E - 11 2026-07-11
ICE681 - 10 2026-07-10
ICE42P - 10 2026-07-13
ICE83C Icelandair 9 2026-07-25
ICE82B Icelandair 9 2026-07-25
ICE88E Icelandair 8 2026-07-21
ICE855 - 8 2026-06-27
ICE680 - 8 2026-07-06
ICE533 Icelandair 8 2026-07-23
ICE99K - 7 2026-07-16
ICE98C - 7 2026-07-16
ICE76V Icelandair 7 2026-06-29
ICE75T - 7 2026-06-29
ICE648 - 7 2026-07-16
ICE547 - 7 2026-06-18
ICE532 Icelandair 7 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ICE579 LIS → KEF Jul 26, 21:30 UTCJul 26, 22:25 UTC55m
2026-07-26 ICE578 KEF → LIS Jul 26, 16:05 UTCJul 26, 19:50 UTC3h 45m
2026-07-26 ICE56K JFK → KEF Jul 26, 08:20 UTCJul 26, 08:40 UTC20m
2026-07-26 ICE56K JFK → KEF Jul 26, 03:35 UTCJul 26, 05:20 UTC1h 45m
2026-07-25 ICE55L KEF → JFK Jul 25, 23:10 UTCJul 26, 01:15 UTC2h 5m
2026-07-25 ICE55L KEF → JFK Jul 25, 19:55 UTCJul 25, 20:10 UTC15m
2026-07-25 ICE83C ARN → KEF Jul 25, 15:20 UTCJul 25, 18:10 UTC2h 50m
2026-07-25 ICE82B KEF → ARN Jul 25, 11:20 UTCJul 25, 13:55 UTC2h 35m
2026-07-25 ICE656 MSP → KEF Jul 25, 06:10 UTCJul 25, 06:30 UTC20m
2026-07-25 ICE656 MSP → KEF Jul 25, 01:00 UTCJul 25, 01:45 UTC45m
2026-07-24 ICE657 KEF → MSP Jul 24, 17:20 UTCJul 24, 23:40 UTC6h 20m
2026-07-24 ICE307 ARN → KEF Jul 24, 12:15 UTCJul 24, 15:20 UTC3h 5m
2026-07-24 ICE306 KEF → ARN Jul 24, 08:05 UTCJul 24, 10:35 UTC2h 30m
2026-07-24 ICE606 YHZ → KEF Jul 24, 01:10 UTCJul 24, 04:45 UTC3h 35m
2026-07-23 ICE607 KEF → YHZ Jul 23, 19:05 UTCJul 23, 23:50 UTC4h 45m
2026-07-23 ICE533 MUC → KEF Jul 23, 12:25 UTCJul 23, 16:20 UTC3h 55m
2026-07-23 ICE532 KEF → MUC Jul 23, 07:50 UTCJul 23, 11:10 UTC3h 20m
2026-07-23 ICE38C YYZ → KEF Jul 23, 05:55 UTCJul 23, 06:15 UTC20m
2026-07-23 ICE38C YYZ → KEF Jul 23, 01:35 UTCJul 23, 02:40 UTC1h 5m
2026-07-22 ICE37B KEF → YYZ Jul 22, 22:35 UTCJul 22, 23:45 UTC1h 10m
2026-07-22 ICE37B KEF → YYZ Jul 22, 17:55 UTCJul 22, 18:05 UTC10m
2026-07-22 ICE533 MUC → KEF Jul 22, 12:25 UTCJul 22, 16:35 UTC4h 10m
2026-07-21 ICE88E SEA → KEF Jul 21, 13:20 UTCJul 21, 13:35 UTC15m
2026-07-21 ICE88E SEA → KEF Jul 21, 06:45 UTCJul 21, 11:20 UTC4h 35m
2026-07-20 ICE11P KEF → SEA Jul 20, 22:15 UTCJul 21, 03:35 UTC5h 19m
2026-07-20 ICE11P KEF → SEA Jul 20, 19:55 UTCJul 20, 20:10 UTC15m
2026-07-20 ICE83C ARN → KEF Jul 20, 15:30 UTCJul 20, 18:30 UTC3h 0m
2026-07-20 ICE82B - Jul 20, 11:25 UTCJul 20, 14:05 UTC2h 40m
2026-07-20 ICE201 CPH → KEF Jul 20, 05:35 UTCJul 20, 08:45 UTC3h 10m
2026-07-20 ICE202 KEF → CPH Jul 20, 01:35 UTCJul 20, 04:10 UTC2h 35m
2026-07-19 ICE455 LHR → KEF Jul 19, 21:30 UTCJul 20, 00:20 UTC2h 50m
2026-07-19 ICE454 KEF → LHR Jul 19, 17:30 UTCJul 19, 19:50 UTC2h 20m
2026-07-19 ICE35E EDI → KEF Jul 19, 13:45 UTCJul 19, 16:05 UTC2h 20m
2026-07-19 ICE34E KEF → EDI Jul 19, 10:30 UTCJul 19, 12:25 UTC1h 55m
2026-07-19 ICE525 FRA → KEF Jul 19, 05:40 UTCJul 19, 09:15 UTC3h 35m
2026-07-19 ICE524 KEF → FRA Jul 19, 01:00 UTCJul 19, 03:55 UTC2h 55m
2026-07-18 ICE959 FAO → KEF Jul 18, 15:35 UTCJul 18, 19:50 UTC4h 15m
2026-07-18 ICE958 KEF → FAO Jul 18, 10:20 UTCJul 18, 14:15 UTC3h 55m
2026-07-18 ICE525 FRA → KEF Jul 18, 05:40 UTCJul 18, 09:10 UTC3h 30m
2026-07-18 ICE524 KEF → FRA Jul 18, 01:05 UTCJul 18, 03:55 UTC2h 51m
2026-07-17 ICE275 - Jul 17, 20:40 UTCJul 17, 23:25 UTC2h 45m
2026-07-17 ICE274 - Jul 17, 16:55 UTCJul 17, 19:20 UTC2h 25m
2026-07-17 ICE88E - Jul 17, 13:45 UTCJul 17, 14:10 UTC25m
2026-07-17 ICE88E - Jul 17, 07:00 UTCJul 17, 12:00 UTC5h 0m
2026-07-16 ICE11P KEF → SEA Jul 16, 20:05 UTCJul 17, 03:50 UTC7h 45m
2026-07-16 ICE99K CPH → KEF Jul 16, 15:05 UTCJul 16, 17:54 UTC2h 50m
2026-07-16 ICE98C KEF → CPH Jul 16, 10:55 UTCJul 16, 13:45 UTC2h 50m
2026-07-16 ICE648 - Jul 16, 08:30 UTCJul 16, 08:50 UTC20m
2026-07-16 ICE648 - Jul 16, 03:30 UTCJul 16, 05:25 UTC1h 55m
2026-07-15 ICE649 - Jul 15, 23:55 UTCJul 16, 02:05 UTC2h 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 TF-ICM page for operator, model, and routing details .

Mode-S 4CC53B frequently asked

What is Mode-S code 4CC53B?
4CC53B is an ICAO 24-bit transponder address. Assigned to TF-ICM.
Is 4CC53B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:25 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CC53B, octal 23142473, decimal 5,031,227.
What flights does 4CC53B operate?
Mode-S 4CC53B has broadcast 20 distinct callsigns, including ICE55L, ICE11P, ICE56K, ICE43E, ICE12E.