Apparatus

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sensors Mode-S transponder

4CA81D

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-DTM · AIRBUS A-320

Hex
4CA81D
Octal
23124035
Decimal
5,023,773
Country
IE
Tail
EI-DTM
Type
A320
No current signal · last broadcast 2h ago
Flights observed
209
Distinct callsigns
20
Country
IE
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4CA81D.

Country allocation

The ICAO 24-bit address 4CA81D 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 20 distinct

Callsign Airline Flights Last seen
EJU63FY - 19 2026-07-14
EJU34ER - 15 2026-06-20
EJU62ZC - 14 2026-06-20
EJU17HC - 13 2026-06-19
EJU91GR - 12 2026-07-07
EJU84TJ - 12 2026-07-09
EJU79UB - 11 2026-06-30
EJU87LY easyJet Europe 10 2026-06-28
EJU38RC - 10 2026-06-16
EJU95EH - 8 2026-06-16
EJU94AB easyJet Europe 8 2026-06-12
EJU91TL easyJet Europe 7 2026-06-14
EJU45HV easyJet Europe 7 2026-06-12
EJU34GK - 7 2026-07-06
EJU46ZJ - 6 2026-06-18
EJU31LH - 6 2026-07-09
EJU19EG - 6 2026-07-02
EJU5407 - 5 2026-06-30
EJU5424 - 4 2026-06-13
EJU71EJ - 3 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 EJU63FY - Jul 14, 13:40 UTCJul 14, 15:45 UTC2h 5m
2026-07-14 EJU67DU IBZ → LIN Jul 14, 07:40 UTCJul 14, 09:05 UTC1h 25m
2026-07-13 EJU72LX - Jul 13, 18:25 UTCJul 13, 19:35 UTC1h 10m
2026-07-12 EJU51YQ - Jul 12, 15:40 UTCJul 12, 17:05 UTC1h 25m
2026-07-11 EJU98PT BRU → LIN Jul 11, 08:50 UTCJul 11, 10:00 UTC1h 10m
2026-07-11 EJU62ZB - Jul 11, 06:01 UTCJul 11, 07:10 UTC1h 10m
2026-07-09 EJU84TJ CPH → LIN Jul 9, 19:05 UTCJul 9, 20:40 UTC1h 35m
2026-07-09 EJU31LH VIE → LIN Jul 9, 13:35 UTCJul 9, 14:40 UTC1h 5m
2026-07-09 EJU5467 - Jul 9, 06:15 UTCJul 9, 07:25 UTC1h 10m
2026-07-07 EJU51YQ - Jul 7, 15:05 UTCJul 7, 16:20 UTC1h 15m
2026-07-07 EJU91GR LIN → FRA Jul 7, 05:15 UTCJul 7, 06:10 UTC55m
2026-07-06 EJU84TJ - Jul 6, 18:50 UTCJul 6, 20:25 UTC1h 35m
2026-07-06 EJU34GK LIN → CPH Jul 6, 16:05 UTCJul 6, 17:45 UTC1h 40m
2026-07-06 EJU5468 - Jul 6, 08:55 UTCJul 6, 10:25 UTC1h 30m
2026-07-04 EJU16RZ BRU → LIN Jul 4, 19:30 UTCJul 4, 20:35 UTC1h 5m
2026-07-04 EJU71EJ FRA → LIN Jul 4, 15:25 UTCJul 4, 16:10 UTC45m
2026-07-04 EJU62ZB LIN → BRU Jul 4, 07:05 UTCJul 4, 08:25 UTC1h 20m
2026-07-03 EJU71EJ FRA → LIN Jul 3, 18:25 UTCJul 3, 19:10 UTC45m
2026-07-02 EJU84TJ - Jul 2, 18:40 UTCJul 2, 20:30 UTC1h 50m
2026-07-02 EJU19EG LIN → VIE Jul 2, 11:35 UTCJul 2, 12:40 UTC1h 5m
2026-07-02 EJU5467 - Jul 2, 06:15 UTCJul 2, 07:35 UTC1h 20m
2026-06-30 EJU79UB AMS → LIN Jun 30, 19:30 UTCJun 30, 20:50 UTC1h 20m
2026-06-30 EJU5407 LIN → AMS Jun 30, 17:00 UTCJun 30, 18:25 UTC1h 25m
2026-06-29 EJU72LX - Jun 29, 18:44 UTCJun 29, 20:00 UTC1h 15m
2026-06-28 EJU87LY MAN → LIN Jun 28, 12:55 UTCJun 28, 14:45 UTC1h 50m
2026-06-28 EJU91GR LIN → FRA Jun 28, 05:15 UTCJun 28, 06:10 UTC55m
2026-06-26 EJU71EJ FRA → LIN Jun 26, 18:34 UTCJun 26, 19:24 UTC50m
2026-06-26 EJU97DL - Jun 26, 09:35 UTCJun 26, 11:55 UTC2h 20m
2026-06-26 EJU45LE - Jun 26, 05:19 UTCJun 26, 06:04 UTC45m
2026-06-25 EJU51YQ - Jun 25, 15:04 UTCJun 25, 16:24 UTC1h 20m
2026-06-24 EJU79UB AMS → LIN Jun 24, 20:05 UTCJun 24, 21:19 UTC1h 15m
2026-06-24 EJU63FY EDI → LIN Jun 24, 13:30 UTCJun 24, 15:29 UTC2h 0m
2026-06-24 EJU5413 - Jun 24, 05:09 UTCJun 24, 05:59 UTC50m
2026-06-22 EJU91GR LIN → FRA Jun 22, 05:15 UTCJun 22, 06:15 UTC1h 0m
2026-06-21 EJU84TJ - Jun 21, 19:09 UTCJun 21, 20:50 UTC1h 40m
2026-06-20 EJU62ZC LIN → EDI Jun 20, 10:39 UTCJun 20, 12:45 UTC2h 5m
2026-06-20 EJU34ER LIN → AMS Jun 20, 05:24 UTCJun 20, 06:39 UTC1h 15m
2026-06-19 EJU63FY EDI → LIN Jun 19, 14:54 UTCJun 19, 17:14 UTC2h 20m
2026-06-19 EJU17HC AMS → LIN Jun 19, 07:54 UTCJun 19, 09:09 UTC1h 15m
2026-06-18 EJU34GK - Jun 18, 16:05 UTCJun 18, 17:45 UTC1h 40m
2026-06-18 EJU31LH VIE → LIN Jun 18, 13:35 UTCJun 18, 14:30 UTC55m
2026-06-18 EJU46ZJ LIN → BER Jun 18, 06:15 UTCJun 18, 07:35 UTC1h 20m
2026-06-17 EJU63FY EDI → LIN Jun 17, 13:45 UTCJun 17, 15:46 UTC2h 0m
2026-06-17 EJU17HC AMS → LIN Jun 17, 07:45 UTCJun 17, 09:00 UTC1h 15m
2026-06-16 EJU38RC LIN → MAN Jun 16, 09:45 UTCJun 16, 11:40 UTC1h 55m
2026-06-16 EJU95EH FRA → LIN Jun 16, 07:25 UTCJun 16, 08:15 UTC50m
2026-06-15 EJU87LY MAN → LIN Jun 15, 12:45 UTCJun 15, 14:40 UTC1h 55m
2026-06-15 EJU38RC LIN → MAN Jun 15, 09:40 UTCJun 15, 11:34 UTC1h 55m
2026-06-14 EJU91TL BRU → LIN Jun 14, 19:35 UTCJun 14, 20:35 UTC1h 0m
2026-06-14 EJU62FC BCN → BHX Jun 14, 17:30 UTCJun 14, 18:40 UTC1h 10m

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

Mode-S 4CA81D frequently asked

What is Mode-S code 4CA81D?
4CA81D is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-DTM.
Where is Mode-S 4CA81D registered?
Mode-S code 4CA81D is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA81D broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA81D, octal 23124035, decimal 5,023,773.
What flights does 4CA81D operate?
Mode-S 4CA81D has broadcast 20 distinct callsigns, including EJU63FY, EJU34ER, EJU62ZC, EJU17HC, EJU91GR.