Apparatus

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sensors Mode-S transponder

4CA1AA

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-CXV · BOEING 737-800

Hex
4CA1AA
Octal
23120652
Decimal
5,022,122
Country
IE
Tail
EI-CXV
Type
B738
No current signal · last broadcast Jul 26, 21:35 UTC
Flights observed
193
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:35 UTC

Last known position

Most recent position reported by Mode-S 4CA1AA.

Country allocation

The ICAO 24-bit address 4CA1AA 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
MGL223 MIAT Mongolian Airlines 39 2026-07-26
MGL224 MIAT Mongolian Airlines 33 2026-07-25
MGL307 MIAT Mongolian Airlines 15 2026-07-21
MGL297 MIAT Mongolian Airlines 15 2026-07-20
MGL501 MIAT Mongolian Airlines 13 2026-05-29
MGL308 - 11 2026-07-11
MGL298 MIAT Mongolian Airlines 11 2026-07-23
MGL502 MIAT Mongolian Airlines 9 2026-05-30
MGL302 - 5 2026-07-14
MGL304 - 4 2026-07-13
MGL303 - 4 2026-07-13
MGL301 - 4 2026-07-14
MGL509 MIAT Mongolian Airlines 3 2026-07-24
MGL310 - 3 2026-07-12
MGL7308 - 2 2026-05-27
MGL7307 - 2 2026-05-27
MGL510 MIAT Mongolian Airlines 2 2026-07-24
MGL504 - 2 2026-07-15
MGL503 MIAT Mongolian Airlines 2 2026-07-21
MGL309 MIAT Mongolian Airlines 2 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 MGL2973 UBN → HKG Jul 26, 13:30 UTCJul 26, 21:25 UTC7h 55m
2026-07-26 MGL223 UBN → PEK Jul 26, 11:20 UTCJul 26, 11:35 UTC15m
2026-07-25 MGL224 PEK → UBN Jul 25, 01:55 UTCJul 25, 02:10 UTC15m
2026-07-24 MGL223 UBN → PEK Jul 24, 23:40 UTCJul 25, 00:05 UTC25m
2026-07-24 MGL510 NRT → UBN Jul 24, 12:45 UTCJul 24, 15:50 UTC3h 5m
2026-07-24 MGL509 UBN → NRT Jul 24, 08:30 UTCJul 24, 10:45 UTC2h 15m
2026-07-23 MGL509 UBN → NRT Jul 23, 13:55 UTCJul 24, 10:30 UTC20h 35m
2026-07-23 MGL223 UBN → PEK Jul 23, 11:25 UTCJul 23, 11:50 UTC25m
2026-07-23 MGL298 HKG → ULN Jul 23, 05:05 UTCJul 23, 05:20 UTC15m
2026-07-22 MGL506 KIX → UBN Jul 22, 17:50 UTCJul 23, 03:15 UTC9h 25m
2026-07-22 MGL505 UBN → KIX Jul 22, 14:40 UTCJul 22, 16:10 UTC1h 30m
2026-07-21 MGL503 UBN → NRT Jul 21, 19:30 UTCJul 22, 04:35 UTC9h 5m
2026-07-21 MGL307 UBN → ICN Jul 21, 17:20 UTCJul 21, 17:55 UTC35m
2026-07-21 MGL298 HKG → ULN Jul 21, 04:30 UTCJul 21, 04:45 UTC15m
2026-07-20 MGL297 ULN → HKG Jul 20, 23:45 UTCJul 21, 02:50 UTC3h 5m
2026-07-20 MGL297 ULN → HKG Jul 20, 04:55 UTCJul 21, 02:50 UTC21h 55m
2026-07-19 MGL297 ULN → HKG Jul 19, 13:45 UTCJul 20, 02:50 UTC13h 5m
2026-07-19 MGL223 UBN → PEK Jul 19, 11:20 UTCJul 19, 11:45 UTC25m
2026-07-19 MGL298 - Jul 19, 04:30 UTCJul 19, 04:45 UTC15m
2026-07-18 MGL297 ULN → HKG Jul 18, 23:40 UTCJul 19, 02:45 UTC3h 5m
2026-07-18 MGL2972 - Jul 18, 11:10 UTCJul 18, 11:25 UTC15m
2026-07-18 MGL2971 - Jul 18, 06:30 UTCJul 18, 09:30 UTC3h 0m
2026-07-18 MGL224 - Jul 18, 01:39 UTCJul 18, 01:54 UTC15m
2026-07-17 MGL510 NRT → UBN Jul 17, 13:25 UTCJul 17, 23:45 UTC10h 20m
2026-07-16 MGL509 UBN → NRT Jul 16, 15:10 UTCJul 17, 10:30 UTC19h 20m
2026-07-16 MGL307 - Jul 16, 12:20 UTCJul 16, 12:49 UTC30m
2026-07-16 MGL298 - Jul 16, 04:35 UTCJul 16, 04:50 UTC15m
2026-07-15 MGL297 - Jul 15, 08:45 UTCJul 16, 02:40 UTC17h 55m
2026-07-15 MGL504 - Jul 15, 06:35 UTCJul 16, 02:40 UTC20h 5m
2026-07-15 MGL504 - Jul 15, 05:45 UTCJul 16, 02:40 UTC20h 55m
2026-07-14 MGL503 ICN → NRT Jul 14, 15:40 UTCJul 15, 03:55 UTC12h 14m
2026-07-14 MGL307 - Jul 14, 12:30 UTCJul 14, 13:15 UTC45m
2026-07-14 MGL302 - Jul 14, 05:30 UTCJul 14, 07:10 UTC1h 40m
2026-07-14 MGL301 - Jul 14, 03:05 UTCJul 14, 03:25 UTC20m
2026-07-13 MGL228 - Jul 13, 19:20 UTCJul 13, 19:30 UTC10m
2026-07-13 MGL227 - Jul 13, 16:55 UTCJul 13, 17:10 UTC15m
2026-07-13 MGL304 - Jul 13, 07:15 UTCJul 13, 08:45 UTC1h 30m
2026-07-13 MGL303 - Jul 13, 05:05 UTCJul 13, 05:25 UTC20m
2026-07-12 MGL310 - Jul 12, 17:05 UTCJul 12, 18:35 UTC1h 30m
2026-07-12 MGL302 ICN → ICN Jul 12, 05:40 UTCJul 12, 15:20 UTC9h 40m
2026-07-12 MGL301 - Jul 12, 03:10 UTCJul 12, 03:30 UTC20m
2026-07-11 MGL308 - Jul 11, 15:25 UTCJul 11, 16:40 UTC1h 15m
2026-07-11 MGL307 - Jul 11, 13:30 UTCJul 11, 13:50 UTC20m
2026-07-11 MGL224 - Jul 11, 01:55 UTCJul 11, 02:10 UTC15m
2026-07-10 MGL223 - Jul 10, 23:40 UTCJul 11, 00:00 UTC20m
2026-07-10 MGL304 - Jul 10, 07:25 UTCJul 10, 08:55 UTC1h 30m
2026-07-10 MGL303 - Jul 10, 05:25 UTCJul 10, 05:45 UTC20m
2026-07-09 MGL308 - Jul 9, 15:30 UTCJul 10, 04:30 UTC13h 0m
2026-07-09 MGL307 - Jul 9, 12:45 UTCJul 9, 13:00 UTC15m
2026-07-09 MGL298 - Jul 9, 04:35 UTCJul 9, 04:50 UTC15m

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

Mode-S 4CA1AA frequently asked

What is Mode-S code 4CA1AA?
4CA1AA is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-CXV.
Where is Mode-S 4CA1AA registered?
Mode-S code 4CA1AA is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA1AA broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA1AA, octal 23120652, decimal 5,022,122.
What flights does 4CA1AA operate?
Mode-S 4CA1AA has broadcast 20 distinct callsigns, including MGL223, MGL224, MGL307, MGL297, MGL501.