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sensors Mode-S transponder

4CAEC8

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HNH

Hex
4CAEC8
Octal
23127310
Decimal
5,025,480
Country
IE
Tail
EI-HNH
Type
EC45
No current signal · last broadcast 4h ago
Flights observed
20
Distinct callsigns
1
Country
IE
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 4CAEC8.

Country allocation

The ICAO 24-bit address 4CAEC8 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 1 distinct

Callsign Airline Flights Last seen
EIHNH - 20 2026-04-18

Recent flights last 20

DateFlightRouteTakeoffLandingDuration
2026-04-18 EIHNH - Apr 18, 16:30 UTCApr 18, 16:40 UTC10m
2026-04-18 EIHNH - Apr 18, 15:25 UTCApr 18, 15:40 UTC15m
2026-04-18 EIHNH - Apr 18, 11:25 UTCApr 18, 12:05 UTC40m
2026-04-18 EIHNH - Apr 18, 00:40 UTCApr 18, 00:55 UTC15m
2026-04-18 EIHNH - Apr 18, 00:00 UTCApr 18, 00:10 UTC10m
2026-04-17 EIHNH - Apr 17, 18:05 UTCApr 17, 18:20 UTC15m
2026-04-17 EIHNH - Apr 17, 15:50 UTCApr 17, 16:35 UTC45m
2026-04-17 EIHNH - Apr 17, 09:20 UTCApr 17, 09:30 UTC10m
2026-04-17 EIHNH - Apr 17, 08:15 UTCApr 17, 08:50 UTC35m
2026-04-16 EIHNH - Apr 16, 17:20 UTCApr 16, 17:44 UTC25m
2026-04-16 EIHNH - Apr 16, 15:15 UTCApr 16, 16:05 UTC50m
2026-04-16 EIHNH - Apr 16, 11:39 UTCApr 16, 12:00 UTC20m
2026-04-16 EIHNH - Apr 16, 10:29 UTCApr 16, 10:59 UTC30m
2026-04-16 EIHNH - Apr 16, 09:39 UTCApr 16, 09:50 UTC10m
2026-04-16 EIHNH - Apr 16, 08:54 UTCApr 16, 09:05 UTC10m
2026-04-16 EIHNH - Apr 16, 07:49 UTCApr 16, 08:00 UTC10m
2026-04-15 EIHNH - Apr 15, 23:10 UTCApr 15, 23:40 UTC30m
2026-04-15 EIHNH - Apr 15, 21:10 UTCApr 15, 21:35 UTC25m
2026-04-15 EIHNH - Apr 15, 20:00 UTCApr 15, 20:10 UTC10m
2026-04-15 EIHNH - Apr 15, 17:25 UTCApr 15, 17:35 UTC10m

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

Mode-S 4CAEC8 frequently asked

What is Mode-S code 4CAEC8?
4CAEC8 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HNH.
Where is Mode-S 4CAEC8 registered?
Mode-S code 4CAEC8 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAEC8 broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAEC8, octal 23127310, decimal 5,025,480.
What flights does 4CAEC8 operate?
Mode-S 4CAEC8 has broadcast 1 distinct callsign, including EIHNH.