Apparatus

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sensors Mode-S transponder

4CA9E7

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-NUA · BOEING 787-9 Dreamliner

Hex
4CA9E7
Octal
23124747
Decimal
5,024,231
Country
IE
Tail
EI-NUA
Type
B789
No current signal · last broadcast 10h ago
Flights observed
97
Distinct callsigns
20
Country
IE
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 4CA9E7.

Country allocation

The ICAO 24-bit address 4CA9E7 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
NOS611 Neos 8 2026-05-23
NOS573 Neos 6 2026-05-01
NOS127 - 5 2026-04-14
NOS789 Neos 4 2026-05-18
NOS787 Neos 4 2026-05-18
NOS523 Neos 4 2026-05-30
NOS153 Neos 4 2026-05-26
NOS126 Neos 4 2026-04-13
NOS947 - 3 2026-04-17
NOS946 - 3 2026-04-16
NOS852 - 3 2026-05-27
NOS76TA Neos 3 2026-05-24
NOS631 Neos 3 2026-05-02
NOS403 Neos 3 2026-05-07
NOS27XN - 3 2026-05-23
NOS773 Neos 2 2026-05-03
NOS772 Neos 2 2026-05-03
NOS55BJ Neos 2 2026-05-25
NOS522 Neos 2 2026-05-29
NOS43RR - 2 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 NOS523 FCO → VRN May 30, 10:00 UTCMay 30, 10:40 UTC40m
2026-05-29 NOS523 FCO → VRN May 29, 11:50 UTCMay 30, 07:40 UTC19h 50m
2026-05-29 NOS522 MBJ → VRN May 29, 11:20 UTCMay 30, 07:40 UTC20h 20m
2026-05-29 NOS98AQ VRN → FCO May 29, 08:10 UTCMay 29, 08:55 UTC45m
2026-05-29 NOS822 - May 29, 05:45 UTCMay 29, 06:05 UTC20m
2026-05-28 NOS7613 LXR → MXP May 28, 07:00 UTCMay 28, 15:20 UTC8h 20m
2026-05-27 NOS952 AMS → MLA May 27, 10:35 UTCMay 27, 13:00 UTC2h 25m
2026-05-27 NOS852 - May 27, 06:34 UTCMay 27, 08:05 UTC1h 31m
2026-05-26 NOS153 NOS → FCO May 26, 17:39 UTCMay 26, 18:19 UTC40m
2026-05-25 NOS153 NOS → FCO May 25, 20:40 UTCMay 26, 16:15 UTC19h 35m
2026-05-25 NOS55BJ VRN → FCO May 25, 17:55 UTCMay 25, 18:35 UTC40m
2026-05-24 NOS76TA FCO → VRN May 24, 17:55 UTCMay 24, 18:45 UTC50m
2026-05-23 NOS611 FCO → VRN May 23, 21:50 UTCMay 24, 16:00 UTC18h 10m
2026-05-23 NOS611 FCO → VRN May 23, 19:50 UTCMay 24, 16:00 UTC20h 10m
2026-05-23 NOS611 FCO → VRN May 23, 19:20 UTCMay 24, 16:00 UTC20h 40m
2026-05-23 NOS27XN MXP → FCO May 23, 16:35 UTCMay 23, 17:20 UTC45m
2026-05-23 NOS82MP MXP → MXP May 23, 04:50 UTCMay 23, 14:25 UTC9h 35m
2026-05-22 NOS431 CUN → FCO May 22, 17:20 UTCMay 22, 18:20 UTC1h 0m
2026-05-22 NOS431 CUN → FCO May 22, 05:15 UTCMay 22, 15:00 UTC9h 45m
2026-05-21 NOS430 MXP → FCO May 21, 15:25 UTCMay 22, 02:40 UTC11h 15m
2026-05-21 NOS430 MXP → FCO May 21, 10:40 UTCMay 21, 11:30 UTC50m
2026-05-20 NOS231 FCO → MXP May 20, 20:45 UTCMay 20, 21:40 UTC55m
2026-05-20 NOS231 FCO → MXP May 20, 00:05 UTCMay 20, 18:55 UTC18h 51m
2026-05-19 NOS230 FCO → HAV May 19, 15:50 UTCMay 20, 15:20 UTC23h 31m
2026-05-19 NOS230 FCO → HAV May 19, 14:50 UTCMay 20, 10:45 UTC19h 56m
2026-05-19 NOS52EM - May 19, 11:55 UTCMay 19, 12:45 UTC50m
2026-05-18 NOS789 JFK → MXP May 18, 21:20 UTCMay 19, 04:15 UTC6h 55m
2026-05-18 NOS787 MXP → JFK May 18, 10:40 UTCMay 18, 18:20 UTC7h 40m
2026-05-17 NOS76TA FCO → VRN May 17, 17:50 UTCMay 17, 18:40 UTC50m
2026-05-17 NOS611 FCO → VRN May 17, 00:05 UTCMay 17, 16:05 UTC16h 0m
2026-05-16 NOS611 FCO → VRN May 16, 19:50 UTCMay 17, 16:05 UTC20h 15m
2026-05-16 NOS27XN MXP → FCO May 16, 16:15 UTCMay 16, 17:10 UTC55m
2026-05-12 NOS247 NOS → MXP May 12, 21:50 UTCMay 13, 17:40 UTC19h 50m
2026-05-12 NOS247 NOS → MXP May 12, 21:15 UTCMay 13, 17:40 UTC20h 25m
2026-05-12 NOS8246 FCO → MXP May 12, 17:55 UTCMay 12, 18:50 UTC55m
2026-05-11 NOS153 NOS → FCO May 11, 21:50 UTCMay 12, 16:30 UTC18h 40m
2026-05-11 NOS153 NOS → FCO May 11, 21:15 UTCMay 12, 16:30 UTC19h 15m
2026-05-11 NOS55BJ VRN → FCO May 11, 18:25 UTCMay 11, 19:05 UTC40m
2026-05-10 NOS76TA FCO → VRN May 10, 18:09 UTCMay 10, 18:45 UTC35m
2026-05-09 NOS611 FCO → VRN May 9, 22:20 UTCMay 10, 16:25 UTC18h 5m
2026-05-09 NOS611 FCO → VRN May 9, 19:49 UTCMay 10, 16:25 UTC20h 35m
2026-05-09 NOS611 FCO → VRN May 9, 19:25 UTCMay 10, 16:25 UTC21h 0m
2026-05-09 NOS27XN - May 9, 16:35 UTCMay 9, 17:20 UTC45m
2026-05-09 NOS523 FCO → VRN May 9, 11:05 UTCMay 9, 11:45 UTC40m
2026-05-09 NOS523 FCO → VRN May 9, 01:10 UTCMay 9, 09:25 UTC8h 15m
2026-05-08 NOS522 MBJ → VRN May 8, 13:20 UTCMay 8, 15:45 UTC2h 25m
2026-05-07 NOS403 CUN → MXP May 7, 18:30 UTCMay 8, 08:40 UTC14h 9m
2026-05-07 NOS403 CUN → MXP May 7, 09:50 UTCMay 8, 08:40 UTC22h 50m
2026-05-07 NOS403 CUN → MXP May 7, 09:05 UTCMay 8, 07:44 UTC22h 40m
2026-05-07 NOS402 HAV → MXP May 7, 05:35 UTCMay 7, 06:35 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-NUA page for operator, model, and routing details .

Mode-S 4CA9E7 frequently asked

What is Mode-S code 4CA9E7?
4CA9E7 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-NUA.
Where is Mode-S 4CA9E7 registered?
Mode-S code 4CA9E7 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA9E7 broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA9E7, octal 23124747, decimal 5,024,231.
What flights does 4CA9E7 operate?
Mode-S 4CA9E7 has broadcast 20 distinct callsigns, including NOS611, NOS573, NOS127, NOS789, NOS787.