Apparatus

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sensors Mode-S transponder

4CC549

ICAO 24-bit transponder address

Currently assigned to TF-ICS · BOEING 737 MAX 8

Hex
4CC549
Octal
23142511
Decimal
5,031,241
Tail
TF-ICS
Type
B38M
No current signal · last broadcast 1h ago
Flights observed
182
Distinct callsigns
20
Country
-
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CC549.

Callsign history 20 distinct

Callsign Airline Flights Last seen
ICE1A Icelandair 7 2026-05-19
ICE11P Icelandair 6 2026-05-22
ICE680 Icelandair 5 2026-05-26
ICE855 Icelandair 4 2026-05-14
ICE825 Icelandair 4 2026-05-10
ICE824 Icelandair 4 2026-05-11
ICE473 Icelandair 4 2026-05-22
ICE2B Icelandair 4 2026-05-20
ICE856 Icelandair 3 2026-05-14
ICE83C Icelandair 3 2026-05-21
ICE82B Icelandair 3 2026-05-21
ICE74A Icelandair 3 2026-04-25
ICE6EZ Icelandair 3 2026-05-17
ICE656 Icelandair 3 2026-04-26
ICE623 Icelandair 3 2026-05-09
ICE545 - 3 2026-04-14
ICE532 Icelandair 3 2026-05-30
ICE521 Icelandair 3 2026-04-17
ICE472 Icelandair 3 2026-05-22
ICE455 Icelandair 3 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 ICE532 KEF → MUC May 30, 07:50 UTCMay 30, 11:20 UTC3h 30m
2026-05-30 ICE830 PIT → KEF May 30, 00:40 UTCMay 30, 06:05 UTC5h 25m
2026-05-29 ICE83P KEF → PIT May 29, 17:35 UTCMay 29, 23:05 UTC5h 30m
2026-05-29 ICE431 GLA → KEF May 29, 13:35 UTCMay 29, 15:30 UTC1h 56m
2026-05-29 ICE432 KEF → GLA May 29, 10:25 UTCMay 29, 12:20 UTC1h 55m
2026-05-29 ICE820 RDU → KEF May 29, 00:50 UTCMay 29, 06:35 UTC5h 45m
2026-05-28 ICE821 KEF → RDU May 28, 17:10 UTCMay 28, 23:10 UTC6h 0m
2026-05-28 ICE431 GLA → KEF May 28, 13:45 UTCMay 28, 15:35 UTC1h 50m
2026-05-28 ICE432 KEF → GLA May 28, 10:25 UTCMay 28, 12:20 UTC1h 55m
2026-05-28 ICE830 PIT → KEF May 28, 00:55 UTCMay 28, 06:15 UTC5h 20m
2026-05-27 ICE83P KEF → PIT May 27, 17:30 UTCMay 27, 23:25 UTC5h 55m
2026-05-27 ICE537 MUC → KEF May 27, 12:10 UTCMay 27, 16:10 UTC4h 0m
2026-05-27 ICE536 KEF → MUC May 27, 07:40 UTCMay 27, 10:40 UTC3h 0m
2026-05-26 ICE680 SEA → KEF May 26, 22:59 UTCMay 27, 05:49 UTC6h 50m
2026-05-26 ICE685 KEF → SEA May 26, 10:54 UTCMay 26, 18:19 UTC7h 25m
2026-05-26 ICE694 YVR → KEF May 26, 02:39 UTCMay 26, 09:19 UTC6h 40m
2026-05-25 ICE45R KEF → YVR May 25, 17:35 UTCMay 26, 01:00 UTC7h 25m
2026-05-25 ICE431 GLA → KEF May 25, 13:40 UTCMay 25, 15:40 UTC2h 0m
2026-05-25 ICE432 KEF → GLA May 25, 10:25 UTCMay 25, 12:20 UTC1h 55m
2026-05-25 ICE201 CPH → KEF May 25, 05:35 UTCMay 25, 08:45 UTC3h 10m
2026-05-25 ICE202 KEF → CPH May 25, 02:20 UTCMay 25, 03:40 UTC1h 20m
2026-05-24 ICE217 CPH → KEF May 24, 20:40 UTCMay 24, 23:45 UTC3h 5m
2026-05-24 ICE216 KEF → CPH May 24, 16:45 UTCMay 24, 19:15 UTC2h 30m
2026-05-24 ICE19A LGW → KEF May 24, 12:20 UTCMay 24, 15:05 UTC2h 45m
2026-05-24 ICE6H KEF → LGW May 24, 07:40 UTCMay 24, 10:30 UTC2h 50m
2026-05-23 ICE455 LHR → KEF May 23, 20:30 UTCMay 23, 23:05 UTC2h 35m
2026-05-23 ICE454 KEF → LHR May 23, 16:15 UTCMay 23, 18:45 UTC2h 30m
2026-05-23 ICE88E SEA → KEF May 23, 07:00 UTCMay 23, 14:00 UTC7h 0m
2026-05-22 ICE11P KEF → SEA May 22, 20:00 UTCMay 23, 03:40 UTC7h 39m
2026-05-22 ICE473 LGW → KEF May 22, 17:35 UTCMay 22, 17:55 UTC20m
2026-05-22 ICE473 LGW → KEF May 22, 15:20 UTCMay 22, 16:30 UTC1h 10m
2026-05-22 ICE472 KEF → LGW May 22, 10:55 UTCMay 22, 13:50 UTC2h 55m
2026-05-22 ICE604 YYZ → KEF May 22, 03:20 UTCMay 22, 08:20 UTC5h 0m
2026-05-21 ICE605 KEF → YYZ May 21, 20:25 UTCMay 22, 01:45 UTC5h 20m
2026-05-21 ICE83C ARN → KEF May 21, 16:20 UTCMay 21, 19:10 UTC2h 50m
2026-05-21 ICE82B KEF → ARN May 21, 12:20 UTCMay 21, 15:10 UTC2h 50m
2026-05-21 ICE694 YVR → KEF May 21, 03:45 UTCMay 21, 10:45 UTC7h 0m
2026-05-20 ICE45R KEF → YVR May 20, 19:00 UTCMay 21, 02:00 UTC7h 0m
2026-05-20 ICE417 DUB → KEF May 20, 12:00 UTCMay 20, 14:00 UTC2h 0m
2026-05-20 ICE416 KEF → DUB May 20, 08:00 UTCMay 20, 10:00 UTC2h 0m
2026-05-20 ICE2B IAD → KEF May 20, 01:00 UTCMay 20, 06:25 UTC5h 26m
2026-05-19 ICE1A KEF → IAD May 19, 20:50 UTCMay 19, 23:15 UTC2h 25m
2026-05-19 ICE1A KEF → IAD May 19, 17:10 UTCMay 19, 17:25 UTC15m
2026-05-19 ICE451 LHR → KEF May 19, 12:20 UTCMay 19, 14:50 UTC2h 30m
2026-05-19 ICE450 KEF → LHR May 19, 08:05 UTCMay 19, 10:50 UTC2h 45m
2026-05-18 ICE217 CPH → KEF May 18, 21:05 UTCMay 18, 23:50 UTC2h 45m
2026-05-18 ICE216 KEF → CPH May 18, 16:55 UTCMay 18, 19:50 UTC2h 54m
2026-05-18 ICE5BK BGO → KEF May 18, 13:40 UTCMay 18, 15:40 UTC2h 0m
2026-05-18 ICE4BE KEF → BGO May 18, 10:30 UTCMay 18, 12:30 UTC2h 0m
2026-05-18 ICE56K JFK → KEF May 18, 03:30 UTCMay 18, 08:35 UTC5h 5m

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

Mode-S 4CC549 frequently asked

What is Mode-S code 4CC549?
4CC549 is an ICAO 24-bit transponder address. Assigned to TF-ICS.
Is 4CC549 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CC549, octal 23142511, decimal 5,031,241.
What flights does 4CC549 operate?
Mode-S 4CC549 has broadcast 20 distinct callsigns, including ICE1A, ICE11P, ICE680, ICE855, ICE825.