Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4CC581

ICAO 24-bit transponder address

Currently assigned to TF-IAD · AIRBUS A-321neo

Hex
4CC581
Octal
23142601
Decimal
5,031,297
Tail
TF-IAD
Type
A21N
No current signal · last broadcast 2h ago
Flights observed
322
Distinct callsigns
20
Country
-
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4CC581.

Callsign history 20 distinct

Callsign Airline Flights Last seen
ICE664 Icelandair 20 2026-07-08
ICE665 - 17 2026-07-05
ICE820 Icelandair 13 2026-05-18
ICE689 - 12 2026-06-26
ICE615 - 12 2026-06-29
ICE614 - 12 2026-06-30
ICE501 - 12 2026-07-13
ICE500 - 12 2026-07-13
ICE686 - 10 2026-06-27
ICE663 - 10 2026-07-07
ICE623 - 10 2026-07-12
ICE821 Icelandair 9 2026-05-17
ICE662 - 9 2026-07-06
ICE622 - 9 2026-07-13
ICE451 - 8 2026-06-18
ICE8K - 7 2026-07-09
ICE7J - 7 2026-07-09
ICE450 - 7 2026-06-18
ICE580 - 6 2026-06-27
ICE319 - 6 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ICE217 CPH → KEF Jul 13, 21:05 UTCJul 13, 23:55 UTC2h 50m
2026-07-13 ICE216 - Jul 13, 16:55 UTCJul 13, 19:45 UTC2h 50m
2026-07-13 ICE501 - Jul 13, 12:35 UTCJul 13, 15:20 UTC2h 45m
2026-07-13 ICE500 - Jul 13, 08:05 UTCJul 13, 10:55 UTC2h 50m
2026-07-13 ICE622 EWR → KEF Jul 13, 00:40 UTCJul 13, 05:45 UTC5h 5m
2026-07-12 ICE623 KEF → EWR Jul 12, 17:15 UTCJul 12, 22:50 UTC5h 35m
2026-07-12 ICE307 ARN → KEF Jul 12, 12:01 UTCJul 12, 14:55 UTC2h 55m
2026-07-12 ICE306 KEF → ARN Jul 12, 08:05 UTCJul 12, 10:50 UTC2h 45m
2026-07-12 ICE622 EWR → KEF Jul 12, 01:10 UTCJul 12, 06:01 UTC4h 50m
2026-07-11 ICE623 - Jul 11, 17:25 UTCJul 11, 23:05 UTC5h 40m
2026-07-11 ICE15M - Jul 11, 12:40 UTCJul 11, 16:05 UTC3h 25m
2026-07-11 ICE14T - Jul 11, 07:40 UTCJul 11, 10:40 UTC3h 0m
2026-07-10 ICE455 - Jul 10, 21:00 UTCJul 10, 23:40 UTC2h 40m
2026-07-10 ICE454 - Jul 10, 16:40 UTCJul 10, 19:25 UTC2h 45m
2026-07-10 ICE307 ARN → KEF Jul 10, 12:25 UTCJul 10, 15:25 UTC3h 0m
2026-07-10 ICE306 KEF → ARN Jul 10, 08:10 UTCJul 10, 10:55 UTC2h 45m
2026-07-10 ICE622 - Jul 10, 01:25 UTCJul 10, 06:20 UTC4h 55m
2026-07-09 ICE623 KEF → EWR Jul 9, 17:25 UTCJul 9, 23:15 UTC5h 50m
2026-07-09 ICE7J - Jul 9, 12:20 UTCJul 9, 15:15 UTC2h 55m
2026-07-09 ICE8K KEF → CDG Jul 9, 07:45 UTCJul 9, 10:45 UTC3h 0m
2026-07-08 ICE63L - Jul 8, 14:25 UTCJul 8, 18:40 UTC4h 15m
2026-07-08 ICE62L - Jul 8, 08:10 UTCJul 8, 12:05 UTC3h 55m
2026-07-08 ICE664 PDX → KEF Jul 8, 05:30 UTCJul 8, 05:50 UTC20m
2026-07-07 ICE664 PDX → KEF Jul 7, 22:35 UTCJul 8, 03:35 UTC5h 0m
2026-07-07 ICE663 - Jul 7, 13:25 UTCJul 7, 18:40 UTC5h 15m
2026-07-07 ICE663 - Jul 7, 11:05 UTCJul 7, 11:20 UTC15m
2026-07-07 ICE201 CPH → KEF Jul 7, 05:30 UTCJul 7, 08:40 UTC3h 10m
2026-07-07 ICE202 - Jul 7, 01:20 UTCJul 7, 03:45 UTC2h 25m
2026-07-06 ICE99K - Jul 6, 15:10 UTCJul 6, 18:20 UTC3h 10m
2026-07-06 ICE98C KEF → CPH Jul 6, 11:20 UTCJul 6, 13:50 UTC2h 30m
2026-07-06 ICE662 PDX → KEF Jul 6, 02:35 UTCJul 6, 09:50 UTC7h 15m
2026-07-05 ICE665 KEF → PDX Jul 5, 17:05 UTCJul 6, 00:45 UTC7h 40m
2026-07-05 ICE205 CPH → KEF Jul 5, 12:20 UTCJul 5, 15:30 UTC3h 10m
2026-07-05 ICE204 - Jul 5, 08:00 UTCJul 5, 10:35 UTC2h 35m
2026-07-04 ICE664 PDX → KEF Jul 4, 22:30 UTCJul 5, 05:40 UTC7h 10m
2026-07-04 ICE663 KEF → PDX Jul 4, 12:00 UTCJul 4, 19:50 UTC7h 50m
2026-07-04 ICE662 - Jul 4, 10:10 UTCJul 4, 10:25 UTC15m
2026-07-04 ICE662 - Jul 4, 03:15 UTCJul 4, 08:25 UTC5h 10m
2026-07-03 ICE665 KEF → PDX Jul 3, 18:15 UTCJul 4, 01:50 UTC7h 35m
2026-07-03 ICE307 - Jul 3, 12:35 UTCJul 3, 15:30 UTC2h 55m
2026-07-03 ICE306 - Jul 3, 08:00 UTCJul 3, 10:45 UTC2h 45m
2026-07-03 ICE664 PDX → KEF Jul 3, 05:50 UTCJul 3, 06:05 UTC15m
2026-07-02 ICE664 PDX → KEF Jul 2, 22:50 UTCJul 3, 02:25 UTC3h 35m
2026-07-02 ICE663 - Jul 2, 11:05 UTCJul 2, 18:45 UTC7h 40m
2026-07-02 ICE201 - Jul 2, 05:25 UTCJul 2, 08:20 UTC2h 55m
2026-07-02 ICE202 - Jul 2, 01:15 UTCJul 2, 03:55 UTC2h 40m
2026-07-01 ICE85V - Jul 1, 15:50 UTCJul 1, 20:05 UTC4h 15m
2026-07-01 ICE84H - Jul 1, 10:05 UTCJul 1, 14:00 UTC3h 55m
2026-06-30 ICE587 BCN → KEF Jun 30, 22:40 UTCJul 1, 03:00 UTC4h 20m
2026-06-30 ICE84H - Jun 30, 17:35 UTCJun 30, 21:25 UTC3h 50m

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

Mode-S 4CC581 frequently asked

What is Mode-S code 4CC581?
4CC581 is an ICAO 24-bit transponder address. Assigned to TF-IAD.
Is 4CC581 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CC581, octal 23142601, decimal 5,031,297.
What flights does 4CC581 operate?
Mode-S 4CC581 has broadcast 20 distinct callsigns, including ICE664, ICE665, ICE820, ICE689, ICE615.