Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4CC2A3

ICAO 24-bit transponder address · allocated to Iceland

Currently assigned to TF-FIN · BOEING 757-200

Hex
4CC2A3
Octal
23141243
Decimal
5,030,563
Country
IS
Tail
TF-FIN
Type
B752
No current signal · last broadcast 23m ago
Flights observed
111
Distinct callsigns
20
Country
IS
Last broadcast
23m ago

Last known position

Most recent position reported by Mode-S 4CC2A3.

Country allocation

The ICAO 24-bit address 4CC2A3 falls within the block assigned to Iceland (IS) by ICAO Annex 10, Volume III. Every aircraft registered in Iceland 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
ICE670 Icelandair 20 2026-05-29
ICE671 Icelandair 16 2026-05-28
ICE28P Icelandair 6 2026-05-29
ICE597 Icelandair 5 2026-05-17
ICE596 Icelandair 5 2026-05-17
ICE432 Icelandair 4 2026-05-09
ICE27M Icelandair 4 2026-05-29
ICE85V Icelandair 3 2026-04-15
ICE84H Icelandair 3 2026-04-14
ICE521 Icelandair 3 2026-05-23
ICE520 Icelandair 3 2026-05-23
ICE455 Icelandair 3 2026-05-26
ICE454 Icelandair 3 2026-05-26
ICE431 Icelandair 3 2026-05-09
ICE319 Icelandair 3 2026-05-26
ICE318 Icelandair 3 2026-05-26
ICE8K Icelandair 2 2026-05-28
ICE7J Icelandair 2 2026-05-28
ICE1081 - 2 2026-05-13
ICE1080 Icelandair 2 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 ICE670 DEN → KEF May 29, 22:45 UTCMay 30, 00:45 UTC2h 0m
2026-05-29 ICE27M KEF → DEN May 29, 16:10 UTCMay 29, 18:15 UTC2h 5m
2026-05-29 ICE27M KEF → DEN May 29, 11:10 UTCMay 29, 11:25 UTC15m
2026-05-29 ICE28P DEN → KEF May 29, 09:40 UTCMay 29, 10:05 UTC25m
2026-05-29 ICE28P DEN → KEF May 29, 02:55 UTCMay 29, 04:45 UTC1h 50m
2026-05-28 ICE671 KEF → DEN May 28, 17:50 UTCMay 29, 01:05 UTC7h 15m
2026-05-28 ICE7J CDG → KEF May 28, 13:25 UTCMay 28, 16:25 UTC3h 0m
2026-05-28 ICE8K KEF → CDG May 28, 07:55 UTCMay 28, 10:50 UTC2h 55m
2026-05-27 ICE63L FCO → KEF May 27, 14:05 UTCMay 27, 18:35 UTC4h 30m
2026-05-27 ICE62L KEF → FCO May 27, 08:00 UTCMay 27, 12:00 UTC4h 0m
2026-05-26 ICE455 LHR → KEF May 26, 20:54 UTCMay 26, 23:45 UTC2h 50m
2026-05-26 ICE454 KEF → LHR May 26, 16:15 UTCMay 26, 18:45 UTC2h 30m
2026-05-26 ICE319 OSL → KEF May 26, 11:54 UTCMay 26, 14:35 UTC2h 40m
2026-05-26 ICE318 KEF → OSL May 26, 08:10 UTCMay 26, 10:14 UTC2h 5m
2026-05-25 ICE501 AMS → KEF May 25, 12:35 UTCMay 25, 15:30 UTC2h 55m
2026-05-25 ICE500 KEF → AMS May 25, 07:55 UTCMay 25, 10:35 UTC2h 40m
2026-05-25 ICE670 DEN → KEF May 25, 05:20 UTCMay 25, 05:40 UTC20m
2026-05-24 ICE670 DEN → KEF May 24, 23:00 UTCMay 24, 23:46 UTC46m
2026-05-24 ICE27M KEF → DEN May 24, 11:05 UTCMay 24, 18:25 UTC7h 20m
2026-05-24 ICE28P DEN → KEF May 24, 09:00 UTCMay 24, 09:20 UTC20m
2026-05-24 ICE28P DEN → KEF May 24, 02:35 UTCMay 24, 04:25 UTC1h 50m
2026-05-23 ICE671 KEF → DEN May 23, 22:35 UTCMay 24, 00:50 UTC2h 15m
2026-05-23 ICE671 KEF → DEN May 23, 17:30 UTCMay 23, 17:40 UTC10m
2026-05-23 ICE521 FRA → KEF May 23, 12:45 UTCMay 23, 16:10 UTC3h 25m
2026-05-23 ICE520 KEF → FRA May 23, 07:40 UTCMay 23, 10:40 UTC3h 0m
2026-05-23 ICE670 DEN → KEF May 23, 05:35 UTCMay 23, 05:50 UTC15m
2026-05-22 ICE670 DEN → KEF May 22, 23:00 UTCMay 23, 00:45 UTC1h 45m
2026-05-22 ICE27M KEF → DEN May 22, 11:00 UTCMay 22, 18:25 UTC7h 25m
2026-05-22 ICE28P DEN → KEF May 22, 09:30 UTCMay 22, 09:50 UTC20m
2026-05-22 ICE28P DEN → KEF May 22, 03:10 UTCMay 22, 04:55 UTC1h 45m
2026-05-21 ICE671 KEF → DEN May 21, 18:05 UTCMay 22, 01:35 UTC7h 30m
2026-05-21 ICE521 FRA → KEF May 21, 13:15 UTCMay 21, 16:30 UTC3h 15m
2026-05-21 ICE520 KEF → FRA May 21, 07:55 UTCMay 21, 11:05 UTC3h 10m
2026-05-20 ICE217 CPH → KEF May 20, 21:00 UTCMay 20, 23:50 UTC2h 50m
2026-05-20 ICE216 KEF → CPH May 20, 17:00 UTCMay 20, 19:45 UTC2h 45m
2026-05-17 ICE597 BCN → KEF May 17, 15:55 UTCMay 17, 20:01 UTC4h 5m
2026-05-17 ICE596 KEF → BCN May 17, 10:20 UTCMay 17, 14:20 UTC4h 0m
2026-05-16 ICE959 FAO → KEF May 16, 15:40 UTCMay 16, 19:50 UTC4h 10m
2026-05-16 ICE958 KEF → FAO May 16, 10:16 UTCMay 16, 14:31 UTC4h 15m
2026-05-15 ICE670 DEN → KEF May 15, 22:55 UTCMay 16, 05:30 UTC6h 35m
2026-05-14 ICE671 KEF → DEN May 14, 17:15 UTCMay 15, 00:50 UTC7h 35m
2026-05-14 ICE307 ARN → KEF May 14, 12:00 UTCMay 14, 14:55 UTC2h 55m
2026-05-14 ICE306 KEF → ARN May 14, 08:00 UTCMay 14, 10:45 UTC2h 45m
2026-05-13 ICE1081 - May 13, 15:40 UTCMay 13, 20:40 UTC5h 0m
2026-05-13 ICE1080 KEF → XRY May 13, 08:55 UTCMay 13, 12:55 UTC4h 0m
2026-05-12 ICE670 DEN → KEF May 12, 22:40 UTCMay 13, 05:25 UTC6h 45m
2026-05-11 ICE671 KEF → DEN May 11, 17:40 UTCMay 11, 17:55 UTC15m
2026-05-11 ICE521 FRA → KEF May 11, 13:05 UTCMay 11, 16:30 UTC3h 25m
2026-05-11 ICE520 KEF → FRA May 11, 07:55 UTCMay 11, 11:05 UTC3h 10m
2026-05-10 ICE670 DEN → KEF May 10, 22:45 UTCMay 11, 05:45 UTC7h 0m

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

Mode-S 4CC2A3 frequently asked

What is Mode-S code 4CC2A3?
4CC2A3 is an ICAO 24-bit transponder address. Allocated to Iceland. Assigned to TF-FIN.
Where is Mode-S 4CC2A3 registered?
Mode-S code 4CC2A3 is allocated to Iceland (IS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CC2A3 broadcasting right now?
No active broadcast right now. Last signal was 23m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CC2A3, octal 23141243, decimal 5,030,563.
What flights does 4CC2A3 operate?
Mode-S 4CC2A3 has broadcast 20 distinct callsigns, including ICE670, ICE671, ICE28P, ICE597, ICE596.