sensors Mode-S transponder

4CAF7E

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-SIE · AIRBUS A-320neo

Hex
4CAF7E
Octal
23127576
Decimal
5,025,662
Country
IE
Tail
EI-SIE
Type
A20N
No current signal · last broadcast 16h ago
Flights observed
11
Distinct callsigns
9
Country
IE
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 4CAF7E.

Country allocation

The ICAO 24-bit address 4CAF7E falls within the block assigned to Ireland (IE) by ICAO Annex 10, Volume III. Every aircraft registered in Ireland 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 9 distinct

Callsign Airline Flights Last seen
SAS94Y - 2 2026-04-13
SAS527 - 2 2026-04-13
SAS864 - 1 2026-04-14
SAS67W - 1 2026-04-14
SAS55P - 1 2026-04-14
SAS55A - 1 2026-04-12
SAS528 - 1 2026-04-13
SAS38H Scandinavian Airlines System 1 2026-04-13
SAS35K - 1 2026-04-12

Recent flights last 11

DateFlightRouteTakeoffLandingDuration
2026-04-14 SAS67W - Apr 14, 09:55 UTCApr 14, 11:05 UTC1h 10m
2026-04-14 SAS864 OSL → ARN Apr 14, 07:30 UTCApr 14, 08:10 UTC40m
2026-04-14 SAS55P ARN → OSL Apr 14, 05:35 UTCApr 14, 06:20 UTC45m
2026-04-13 SAS528 - Apr 13, 17:35 UTCApr 13, 19:30 UTC1h 55m
2026-04-13 SAS527 - Apr 13, 15:50 UTCApr 13, 16:05 UTC15m
2026-04-13 SAS527 ARN → LHR Apr 13, 13:35 UTCApr 13, 16:05 UTC2h 30m
2026-04-13 SAS94Y - Apr 13, 11:55 UTCApr 13, 12:20 UTC25m
2026-04-13 SAS94Y - Apr 13, 08:55 UTCApr 13, 12:15 UTC3h 20m
2026-04-13 SAS38H ARN → ATH Apr 13, 04:25 UTCApr 13, 07:45 UTC3h 20m
2026-04-12 SAS55A - Apr 12, 19:00 UTCApr 12, 20:15 UTC1h 15m
2026-04-12 SAS35K - Apr 12, 17:15 UTCApr 12, 18:00 UTC45m

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 EI-SIE page for operator, model, and routing details .

Mode-S 4CAF7E frequently asked

What is Mode-S code 4CAF7E?
4CAF7E is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-SIE.
Where is Mode-S 4CAF7E registered?
Mode-S code 4CAF7E is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAF7E broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAF7E, octal 23127576, decimal 5,025,662.
What flights does 4CAF7E operate?
Mode-S 4CAF7E has broadcast 9 distinct callsigns, including SAS94Y, SAS527, SAS864, SAS67W, SAS55P.