sensors Mode-S transponder

4CAF26

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-ILL · BOEING 737 MAX 8

Hex
4CAF26
Octal
23127446
Decimal
5,025,574
Country
IE
Tail
EI-ILL
Type
B38M
No current signal · last broadcast 16h ago
Flights observed
12
Distinct callsigns
7
Country
IE
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 4CAF26.

Country allocation

The ICAO 24-bit address 4CAF26 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 7 distinct

Callsign Airline Flights Last seen
RYR7BZ - 3 2026-04-13
RYR2KR Ryanair 3 2026-04-13
RYR29BB - 2 2026-04-14
RYR86MF - 1 2026-04-13
RYR67QY - 1 2026-04-12
RYR2YY Ryanair 1 2026-04-12
RYR28KJ - 1 2026-04-13

Recent flights last 12

DateFlightRouteTakeoffLandingDuration
2026-04-14 RYR29BB - Apr 14, 07:10 UTCApr 14, 09:00 UTC1h 50m
2026-04-14 RYR29BB - Apr 14, 05:15 UTCApr 14, 07:10 UTC1h 55m
2026-04-13 RYR28KJ - Apr 13, 20:30 UTCApr 13, 23:10 UTC2h 40m
2026-04-13 RYR86MF NCL → ALC Apr 13, 16:55 UTCApr 13, 19:20 UTC2h 25m
2026-04-13 RYR7BZ - Apr 13, 12:20 UTCApr 13, 13:30 UTC1h 10m
2026-04-13 RYR7BZ - Apr 13, 11:55 UTCApr 13, 13:30 UTC1h 35m
2026-04-13 RYR7BZ - Apr 13, 09:50 UTCApr 13, 12:15 UTC2h 25m
2026-04-13 RYR2KR AGA → BGY Apr 13, 08:20 UTCApr 13, 08:50 UTC30m
2026-04-13 RYR2KR AGA → BGY Apr 13, 07:55 UTCApr 13, 08:50 UTC55m
2026-04-13 RYR2KR AGA → BGY Apr 13, 05:00 UTCApr 13, 08:15 UTC3h 15m
2026-04-12 RYR2YY SNN → FAO Apr 12, 19:50 UTCApr 12, 20:15 UTC25m
2026-04-12 RYR67QY - Apr 12, 17:15 UTCApr 12, 18:15 UTC1h 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 EI-ILL page for operator, model, and routing details .

Mode-S 4CAF26 frequently asked

What is Mode-S code 4CAF26?
4CAF26 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-ILL.
Where is Mode-S 4CAF26 registered?
Mode-S code 4CAF26 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAF26 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 4CAF26, octal 23127446, decimal 5,025,574.
What flights does 4CAF26 operate?
Mode-S 4CAF26 has broadcast 7 distinct callsigns, including RYR7BZ, RYR2KR, RYR29BB, RYR86MF, RYR67QY.