Apparatus

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sensors Mode-S transponder

4CC278

ICAO 24-bit transponder address · allocated to Iceland

Currently assigned to TF-ISN · BOEING 767-300

Hex
4CC278
Octal
23141170
Decimal
5,030,520
Country
IS
Tail
TF-ISN
Type
B763
No current signal · last broadcast Jul 26, 22:00 UTC
Flights observed
428
Distinct callsigns
20
Country
IS
Last broadcast
Jul 26, 22:00 UTC

Last known position

Most recent position reported by Mode-S 4CC278.

Country allocation

The ICAO 24-bit address 4CC278 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
ICE630 Icelandair 92 2026-07-26
ICE631 Icelandair 81 2026-07-26
ICE205 Icelandair 61 2026-07-26
ICE204 Icelandair 45 2026-07-26
ICE451 Icelandair 29 2026-07-23
ICE450 Icelandair 25 2026-07-23
ICE8K - 21 2026-07-16
ICE7J - 21 2026-07-16
ICE63L - 9 2026-07-12
ICE217 Icelandair 8 2026-07-24
ICE62L - 7 2026-07-12
ICE455 Icelandair 7 2026-07-24
ICE454 Icelandair 6 2026-07-24
ICE216 Icelandair 6 2026-07-23
ICE546 Icelandair 2 2026-04-15
ICE15M Icelandair 2 2026-04-29
ICE7LI Icelandair 1 2026-05-29
ICE6LC Icelandair 1 2026-05-29
ICE547 Icelandair 1 2026-04-15
ICE14T Icelandair 1 2026-04-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ICE631 KEF → BOS Jul 26, 20:45 UTCJul 26, 22:00 UTC1h 15m
2026-07-26 ICE631 KEF → BOS Jul 26, 17:10 UTCJul 26, 17:25 UTC15m
2026-07-26 ICE205 CPH → KEF Jul 26, 12:15 UTCJul 26, 15:05 UTC2h 50m
2026-07-26 ICE204 KEF → CPH Jul 26, 07:50 UTCJul 26, 10:25 UTC2h 35m
2026-07-26 ICE630 BOS → KEF Jul 26, 05:30 UTCJul 26, 05:50 UTC20m
2026-07-26 ICE630 BOS → KEF Jul 26, 01:05 UTCJul 26, 02:30 UTC1h 25m
2026-07-25 ICE631 KEF → BOS Jul 25, 21:15 UTCJul 25, 22:35 UTC1h 20m
2026-07-25 ICE631 KEF → BOS Jul 25, 17:25 UTCJul 25, 17:35 UTC10m
2026-07-25 ICE205 CPH → KEF Jul 25, 14:45 UTCJul 25, 15:05 UTC20m
2026-07-25 ICE205 CPH → KEF Jul 25, 12:10 UTCJul 25, 13:30 UTC1h 20m
2026-07-25 ICE204 KEF → CPH Jul 25, 07:55 UTCJul 25, 10:30 UTC2h 35m
2026-07-24 ICE455 LHR → KEF Jul 24, 20:45 UTCJul 24, 23:30 UTC2h 45m
2026-07-24 ICE454 KEF → LHR Jul 24, 16:30 UTCJul 24, 19:00 UTC2h 30m
2026-07-24 ICE205 CPH → KEF Jul 24, 12:15 UTCJul 24, 15:15 UTC3h 0m
2026-07-24 ICE204 KEF → CPH Jul 24, 07:50 UTCJul 24, 10:20 UTC2h 30m
2026-07-24 ICE217 CPH → KEF Jul 24, 00:05 UTCJul 24, 00:25 UTC20m
2026-07-23 ICE217 CPH → KEF Jul 23, 21:20 UTCJul 23, 22:50 UTC1h 30m
2026-07-23 ICE216 KEF → CPH Jul 23, 17:35 UTCJul 23, 20:05 UTC2h 30m
2026-07-23 ICE451 LHR → KEF Jul 23, 12:25 UTCJul 23, 15:10 UTC2h 45m
2026-07-23 ICE450 KEF → LHR Jul 23, 08:10 UTCJul 23, 10:40 UTC2h 30m
2026-07-22 ICE217 CPH → KEF Jul 22, 20:45 UTCJul 22, 23:45 UTC3h 0m
2026-07-22 ICE216 - Jul 22, 16:45 UTCJul 22, 19:30 UTC2h 45m
2026-07-22 ICE205 CPH → KEF Jul 22, 14:50 UTCJul 22, 15:20 UTC30m
2026-07-22 ICE205 CPH → KEF Jul 22, 12:10 UTCJul 22, 13:30 UTC1h 20m
2026-07-22 ICE630 BOS → KEF Jul 22, 01:05 UTCJul 22, 02:10 UTC1h 5m
2026-07-21 ICE631 KEF → BOS Jul 21, 21:05 UTCJul 21, 22:55 UTC1h 50m
2026-07-21 ICE631 KEF → BOS Jul 21, 17:25 UTCJul 21, 17:40 UTC15m
2026-07-21 ICE205 CPH → KEF Jul 21, 12:15 UTCJul 21, 15:20 UTC3h 5m
2026-07-21 ICE204 KEF → CPH Jul 21, 08:00 UTCJul 21, 10:30 UTC2h 30m
2026-07-20 ICE455 LHR → KEF Jul 20, 20:45 UTCJul 20, 23:40 UTC2h 55m
2026-07-20 ICE454 KEF → LHR Jul 20, 16:45 UTCJul 20, 19:10 UTC2h 25m
2026-07-20 ICE205 CPH → KEF Jul 20, 12:25 UTCJul 20, 15:30 UTC3h 5m
2026-07-20 ICE204 KEF → CPH Jul 20, 08:15 UTCJul 20, 10:50 UTC2h 35m
2026-07-20 ICE630 BOS → KEF Jul 20, 05:20 UTCJul 20, 05:35 UTC15m
2026-07-20 ICE630 BOS → KEF Jul 20, 01:00 UTCJul 20, 02:30 UTC1h 30m
2026-07-19 ICE631 KEF → BOS Jul 19, 21:05 UTCJul 19, 22:45 UTC1h 40m
2026-07-19 ICE631 KEF → BOS Jul 19, 17:15 UTCJul 19, 17:25 UTC10m
2026-07-19 ICE205 - Jul 19, 14:55 UTCJul 19, 15:15 UTC20m
2026-07-19 ICE205 - Jul 19, 12:15 UTCJul 19, 13:40 UTC1h 25m
2026-07-19 ICE204 KEF → CPH Jul 19, 08:00 UTCJul 19, 10:35 UTC2h 35m
2026-07-19 ICE630 BOS → KEF Jul 19, 05:10 UTCJul 19, 05:25 UTC15m
2026-07-19 ICE630 BOS → KEF Jul 19, 01:00 UTCJul 19, 02:10 UTC1h 10m
2026-07-18 ICE631 KEF → BOS Jul 18, 17:25 UTCJul 18, 22:50 UTC5h 25m
2026-07-18 ICE205 - Jul 18, 14:50 UTCJul 18, 15:10 UTC20m
2026-07-18 ICE205 - Jul 18, 12:10 UTCJul 18, 13:30 UTC1h 20m
2026-07-18 ICE204 KEF → CPH Jul 18, 08:00 UTCJul 18, 10:40 UTC2h 40m
2026-07-17 ICE217 CPH → KEF Jul 17, 21:00 UTCJul 17, 23:50 UTC2h 50m
2026-07-17 ICE216 KEF → CPH Jul 17, 16:59 UTCJul 17, 19:45 UTC2h 45m
2026-07-17 ICE205 - Jul 17, 12:40 UTCJul 17, 15:40 UTC3h 0m
2026-07-17 ICE204 - Jul 17, 08:00 UTCJul 17, 10:44 UTC2h 45m

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

Mode-S 4CC278 frequently asked

What is Mode-S code 4CC278?
4CC278 is an ICAO 24-bit transponder address. Allocated to Iceland. Assigned to TF-ISN.
Where is Mode-S 4CC278 registered?
Mode-S code 4CC278 is allocated to Iceland (IS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CC278 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CC278, octal 23141170, decimal 5,030,520.
What flights does 4CC278 operate?
Mode-S 4CC278 has broadcast 20 distinct callsigns, including ICE630, ICE631, ICE205, ICE204, ICE451.