Apparatus

Try JFK, AAL1290, BAW, or N225AN.

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 3h ago
Flights observed
78
Distinct callsigns
13
Country
IE
Last broadcast
3h ago

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 13 distinct

Callsign Airline Flights Last seen
MGL223 MIAT Mongolian Airlines 22 2026-06-02
MGL224 MIAT Mongolian Airlines 18 2026-06-02
MGL501 MIAT Mongolian Airlines 13 2026-05-29
MGL502 MIAT Mongolian Airlines 9 2026-05-30
MGL308 MIAT Mongolian Airlines 3 2026-05-23
MGL7308 - 2 2026-05-27
MGL7307 - 2 2026-05-27
MGL307 MIAT Mongolian Airlines 2 2026-05-23
MGL297 MIAT Mongolian Airlines 2 2026-04-15
MGL302 MIAT Mongolian Airlines 1 2026-05-08
MGL298 MIAT Mongolian Airlines 1 2026-04-15
MGL2972 MIAT Mongolian Airlines 1 2026-04-20
MGL2971 MIAT Mongolian Airlines 1 2026-04-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-02 MGL223 UBN → PEK Jun 2, 23:40 UTCJun 3, 00:00 UTC20m
2026-06-02 MGL224 PEK → UBN Jun 2, 13:30 UTCJun 2, 13:50 UTC20m
2026-06-02 MGL223 UBN → PEK Jun 2, 11:15 UTCJun 2, 11:25 UTC10m
2026-05-30 MGL502 NRT → ULN May 30, 06:25 UTCMay 30, 10:00 UTC3h 35m
2026-05-29 MGL501 ULN → NRT May 29, 13:40 UTCMay 30, 03:55 UTC14h 15m
2026-05-29 MGL223 UBN → PEK May 29, 11:00 UTCMay 29, 11:15 UTC15m
2026-05-28 MGL224 PEK → UBN May 28, 13:25 UTCMay 28, 13:35 UTC10m
2026-05-28 MGL223 UBN → PEK May 28, 11:20 UTCMay 28, 11:40 UTC20m
2026-05-27 MGL7308 - May 27, 15:10 UTCMay 27, 16:50 UTC1h 40m
2026-05-27 MGL7307 - May 27, 12:50 UTCMay 27, 13:10 UTC20m
2026-05-27 MGL224 PEK → UBN May 27, 02:14 UTCMay 27, 02:24 UTC10m
2026-05-26 MGL223 UBN → PEK May 26, 23:29 UTCMay 26, 23:49 UTC20m
2026-05-26 MGL224 PEK → UBN May 26, 13:40 UTCMay 26, 13:50 UTC10m
2026-05-26 MGL223 UBN → PEK May 26, 11:30 UTCMay 26, 11:54 UTC25m
2026-05-23 MGL308 ICN → UBN May 23, 15:10 UTCMay 23, 15:35 UTC25m
2026-05-23 MGL307 UBN → ICN May 23, 12:35 UTCMay 23, 13:05 UTC30m
2026-05-21 MGL224 PEK → UBN May 21, 13:45 UTCMay 21, 14:00 UTC15m
2026-05-20 MGL7308 - May 20, 15:20 UTCMay 20, 17:05 UTC1h 45m
2026-05-20 MGL7307 - May 20, 12:45 UTCMay 20, 13:05 UTC20m
2026-05-20 MGL224 PEK → UBN May 20, 01:50 UTCMay 20, 02:00 UTC10m
2026-05-19 MGL223 UBN → PEK May 19, 23:40 UTCMay 20, 00:00 UTC20m
2026-05-19 MGL224 PEK → UBN May 19, 13:25 UTCMay 19, 13:40 UTC15m
2026-05-19 MGL223 UBN → PEK May 19, 11:20 UTCMay 19, 11:40 UTC20m
2026-05-18 MGL224 PEK → UBN May 18, 01:50 UTCMay 18, 02:00 UTC10m
2026-05-17 MGL223 UBN → PEK May 17, 23:35 UTCMay 17, 23:50 UTC15m
2026-05-17 MGL502 NRT → ULN May 17, 06:15 UTCMay 17, 09:20 UTC3h 5m
2026-05-17 MGL501 ULN → NRT May 17, 02:15 UTCMay 17, 04:30 UTC2h 15m
2026-05-14 MGL502 NRT → ULN May 14, 06:05 UTCMay 14, 08:00 UTC1h 55m
2026-05-14 MGL501 ULN → NRT May 14, 02:15 UTCMay 14, 04:30 UTC2h 15m
2026-05-13 MGL501 ULN → NRT May 13, 06:35 UTCMay 14, 04:30 UTC21h 55m
2026-05-13 MGL501 ULN → NRT May 13, 06:10 UTCMay 14, 04:30 UTC22h 20m
2026-05-13 MGL501 ULN → NRT May 13, 02:25 UTCMay 13, 04:35 UTC2h 10m
2026-05-11 MGL502 NRT → ULN May 11, 06:10 UTCMay 11, 08:15 UTC2h 5m
2026-05-11 MGL501 ULN → NRT May 11, 02:15 UTCMay 11, 04:15 UTC2h 0m
2026-05-10 MGL501 ULN → NRT May 10, 06:35 UTCMay 11, 04:15 UTC21h 40m
2026-05-10 MGL502 NRT → ULN May 10, 06:20 UTCMay 11, 04:15 UTC21h 55m
2026-05-10 MGL501 ULN → NRT May 10, 02:14 UTCMay 10, 04:00 UTC1h 45m
2026-05-09 MGL224 PEK → UBN May 9, 01:50 UTCMay 9, 02:00 UTC10m
2026-05-08 MGL223 UBN → PEK May 8, 23:30 UTCMay 8, 23:50 UTC20m
2026-05-08 MGL302 ICN → UBN May 8, 06:09 UTCMay 8, 07:50 UTC1h 40m
2026-05-07 MGL502 NRT → ULN May 7, 06:10 UTCMay 7, 09:45 UTC3h 35m
2026-05-07 MGL501 ULN → NRT May 7, 02:10 UTCMay 7, 04:05 UTC1h 55m
2026-05-06 MGL224 PEK → UBN May 6, 01:40 UTCMay 6, 01:55 UTC15m
2026-05-05 MGL223 UBN → PEK May 5, 23:40 UTCMay 5, 23:55 UTC15m
2026-05-05 MGL224 PEK → UBN May 5, 13:30 UTCMay 5, 13:45 UTC15m
2026-05-05 MGL223 UBN → PEK May 5, 11:20 UTCMay 5, 11:35 UTC15m
2026-05-04 MGL224 PEK → UBN May 4, 01:40 UTCMay 4, 01:50 UTC10m
2026-05-03 MGL223 UBN → PEK May 3, 23:25 UTCMay 3, 23:45 UTC20m
2026-05-03 MGL502 NRT → ULN May 3, 06:15 UTCMay 3, 09:50 UTC3h 35m
2026-05-03 MGL501 ULN → NRT May 3, 02:20 UTCMay 3, 04:10 UTC1h 49m

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 3h ago.
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 13 distinct callsigns, including MGL223, MGL224, MGL501, MGL502, MGL308.