Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4CC27C

ICAO 24-bit transponder address · allocated to Iceland

Currently assigned to TF-ISR · BOEING 757-200

Hex
4CC27C
Octal
23141174
Decimal
5,030,524
Country
IS
Tail
TF-ISR
Type
B752
No current signal · last broadcast 2d ago
Flights observed
197
Distinct callsigns
20
Country
IS
Last broadcast
2d ago

Last known position

Most recent position reported by Mode-S 4CC27C.

Country allocation

The ICAO 24-bit address 4CC27C 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
ICE28P - 21 2026-07-10
ICE671 - 18 2026-07-09
ICE670 - 17 2026-07-10
ICE27M - 11 2026-07-10
ICE319 - 8 2026-07-02
ICE318 - 8 2026-07-02
ICE217 - 7 2026-07-08
ICE216 - 7 2026-07-08
ICE597 - 6 2026-07-04
ICE596 - 6 2026-07-04
ICE691 Icelandair 4 2026-04-15
ICE690 Icelandair 4 2026-04-16
ICE454 Icelandair 4 2026-05-04
ICE432 - 4 2026-07-09
ICE99K - 3 2026-06-23
ICE98C - 3 2026-06-23
ICE473 - 3 2026-06-25
ICE472 - 3 2026-06-25
ICE455 Icelandair 3 2026-05-04
ICE74A - 2 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-11 ICE5201 - Jul 11, 18:20 UTCJul 11, 21:15 UTC2h 55m
2026-07-11 ICE5201 - Jul 11, 11:10 UTCJul 11, 17:20 UTC6h 10m
2026-07-10 ICE670 DEN → KEF Jul 10, 22:55 UTCJul 11, 05:50 UTC6h 55m
2026-07-10 ICE27M KEF → DEN Jul 10, 11:10 UTCJul 10, 18:30 UTC7h 20m
2026-07-10 ICE28P DEN → KEF Jul 10, 02:50 UTCJul 10, 09:45 UTC6h 55m
2026-07-09 ICE671 KEF → DEN Jul 9, 17:15 UTCJul 10, 01:05 UTC7h 50m
2026-07-09 ICE431 - Jul 9, 14:00 UTCJul 9, 15:50 UTC1h 50m
2026-07-09 ICE432 - Jul 9, 10:35 UTCJul 9, 12:30 UTC1h 55m
2026-07-08 ICE217 CPH → KEF Jul 8, 20:45 UTCJul 8, 23:50 UTC3h 5m
2026-07-08 ICE216 KEF → CPH Jul 8, 16:45 UTCJul 8, 19:20 UTC2h 35m
2026-07-08 ICE73P - Jul 8, 12:25 UTCJul 8, 15:10 UTC2h 45m
2026-07-08 ICE74A KEF → BRU Jul 8, 07:55 UTCJul 8, 10:50 UTC2h 55m
2026-07-07 ICE28P - Jul 7, 09:10 UTCJul 7, 09:30 UTC20m
2026-07-07 ICE28P - Jul 7, 02:40 UTCJul 7, 04:40 UTC2h 0m
2026-07-06 ICE671 KEF → DEN Jul 6, 17:40 UTCJul 7, 01:05 UTC7h 25m
2026-07-06 ICE29E MAN → KEF Jul 6, 13:20 UTCJul 6, 15:45 UTC2h 25m
2026-07-06 ICE28T KEF → MAN Jul 6, 08:55 UTCJul 6, 11:10 UTC2h 15m
2026-07-05 ICE217 - Jul 5, 20:40 UTCJul 5, 23:45 UTC3h 5m
2026-07-05 ICE216 KEF → CPH Jul 5, 16:35 UTCJul 5, 19:05 UTC2h 30m
2026-07-04 ICE597 BCN → KEF Jul 4, 15:15 UTCJul 4, 19:50 UTC4h 35m
2026-07-04 ICE596 KEF → BCN Jul 4, 08:40 UTCJul 4, 12:25 UTC3h 45m
2026-07-04 ICE670 DEN → KEF Jul 4, 00:15 UTCJul 4, 06:45 UTC6h 30m
2026-07-03 ICE27M KEF → DEN Jul 3, 11:15 UTCJul 3, 18:40 UTC7h 25m
2026-07-03 ICE28P - Jul 3, 09:00 UTCJul 3, 09:15 UTC15m
2026-07-03 ICE28P - Jul 3, 02:40 UTCJul 3, 04:40 UTC2h 0m
2026-07-02 ICE671 KEF → DEN Jul 2, 17:15 UTCJul 3, 01:05 UTC7h 50m
2026-07-02 ICE319 - Jul 2, 12:25 UTCJul 2, 14:50 UTC2h 25m
2026-07-02 ICE318 KEF → OSL Jul 2, 08:40 UTCJul 2, 10:55 UTC2h 15m
2026-07-01 ICE573 - Jul 1, 21:30 UTCJul 2, 01:55 UTC4h 25m
2026-07-01 ICE572 - Jul 1, 15:40 UTCJul 1, 19:45 UTC4h 5m
2026-07-01 ICE28P - Jul 1, 09:05 UTCJul 1, 09:20 UTC15m
2026-07-01 ICE28P - Jul 1, 02:50 UTCJul 1, 04:30 UTC1h 40m
2026-06-30 ICE671 KEF → DEN Jun 30, 17:40 UTCJul 1, 01:15 UTC7h 35m
2026-06-30 ICE28P - Jun 30, 08:55 UTCJun 30, 09:15 UTC20m
2026-06-30 ICE28P - Jun 30, 02:30 UTCJun 30, 04:20 UTC1h 50m
2026-06-29 ICE671 KEF → DEN Jun 29, 17:34 UTCJun 30, 01:04 UTC7h 30m
2026-06-29 ICE670 DEN → KEF Jun 29, 05:00 UTCJun 29, 05:15 UTC15m
2026-06-28 ICE670 DEN → KEF Jun 28, 22:34 UTCJun 29, 00:24 UTC1h 50m
2026-06-28 ICE27M - Jun 28, 16:05 UTCJun 28, 18:29 UTC2h 25m
2026-06-28 ICE27M - Jun 28, 11:04 UTCJun 28, 11:19 UTC15m
2026-06-27 ICE597 BCN → KEF Jun 27, 15:05 UTCJun 27, 18:54 UTC3h 50m
2026-06-27 ICE596 KEF → BCN Jun 27, 08:49 UTCJun 27, 12:55 UTC4h 5m
2026-06-26 ICE217 - Jun 26, 20:50 UTCJun 26, 23:44 UTC2h 55m
2026-06-26 ICE216 KEF → CPH Jun 26, 16:44 UTCJun 26, 19:24 UTC2h 40m
2026-06-26 ICE319 - Jun 26, 12:05 UTCJun 26, 14:44 UTC2h 40m
2026-06-26 ICE318 - Jun 26, 08:10 UTCJun 26, 10:20 UTC2h 10m
2026-06-25 ICE473 LGW → KEF Jun 25, 15:15 UTCJun 25, 17:54 UTC2h 40m
2026-06-25 ICE472 KEF → LGW Jun 25, 10:45 UTCJun 25, 13:24 UTC2h 40m
2026-06-24 ICE275 - Jun 24, 20:49 UTCJun 24, 23:40 UTC2h 50m
2026-06-24 ICE274 KEF → BLL Jun 24, 16:54 UTCJun 24, 19:20 UTC2h 25m

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

Mode-S 4CC27C frequently asked

What is Mode-S code 4CC27C?
4CC27C is an ICAO 24-bit transponder address. Allocated to Iceland. Assigned to TF-ISR.
Where is Mode-S 4CC27C registered?
Mode-S code 4CC27C is allocated to Iceland (IS). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CC27C broadcasting right now?
No active broadcast right now. Last signal was 2d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CC27C, octal 23141174, decimal 5,030,524.
What flights does 4CC27C operate?
Mode-S 4CC27C has broadcast 20 distinct callsigns, including ICE28P, ICE671, ICE670, ICE27M, ICE319.