Apparatus

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sensors Mode-S transponder

4CAA15

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAA15
Octal
23125025
Decimal
5,024,277
Country
IE
Tail
EI-MGL
Type
B789
No current signal · last broadcast Jul 26, 18:50 UTC
Flights observed
170
Distinct callsigns
11
Country
IE
Last broadcast
Jul 26, 18:50 UTC

Last known position

Most recent position reported by Mode-S 4CAA15.

Country allocation

The ICAO 24-bit address 4CAA15 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 11 distinct

Callsign Airline Flights Last seen
MGL137 MIAT Mongolian Airlines 29 2026-07-25
MGL302 MIAT Mongolian Airlines 28 2026-07-25
MGL301 MIAT Mongolian Airlines 25 2026-07-23
MGL502 MIAT Mongolian Airlines 24 2026-07-21
MGL138 MIAT Mongolian Airlines 20 2026-07-26
MGL501 - 18 2026-06-29
MGL307 - 10 2026-07-19
MGL309 - 6 2026-07-11
MGL308 - 5 2026-06-27
MGL310 MIAT Mongolian Airlines 4 2026-07-18
MGL7307 - 1 2026-04-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 MGL138 FRA → UBN Jul 26, 13:05 UTCJul 26, 18:50 UTC5h 45m
2026-07-25 MGL137 UBN → FRA Jul 25, 17:00 UTCJul 26, 11:05 UTC18h 6m
2026-07-25 MGL302 ICN → UBN Jul 25, 05:35 UTCJul 25, 15:15 UTC9h 40m
2026-07-24 MGL138 FRA → UBN Jul 24, 12:55 UTCJul 25, 03:40 UTC14h 45m
2026-07-23 MGL137 UBN → FRA Jul 23, 17:20 UTCJul 24, 10:20 UTC17h 0m
2026-07-23 MGL302 ICN → ICN Jul 23, 05:45 UTCJul 23, 15:20 UTC9h 35m
2026-07-23 MGL301 UBN → ICN Jul 23, 03:30 UTCJul 23, 03:50 UTC20m
2026-07-22 MGL138 FRA → UBN Jul 22, 12:45 UTCJul 23, 02:50 UTC14h 5m
2026-07-21 MGL137 UBN → FRA Jul 21, 17:20 UTCJul 22, 11:35 UTC18h 15m
2026-07-21 MGL137 UBN → FRA Jul 21, 17:10 UTCJul 22, 11:35 UTC18h 25m
2026-07-21 MGL502 NRT → ULN Jul 21, 06:20 UTCJul 21, 15:30 UTC9h 10m
2026-07-20 MGL138 FRA → UBN Jul 20, 13:20 UTCJul 21, 04:30 UTC15h 9m
2026-07-19 MGL137 UBN → FRA Jul 19, 15:20 UTCJul 20, 10:20 UTC19h 0m
2026-07-19 MGL307 - Jul 19, 12:25 UTCJul 19, 12:45 UTC20m
2026-07-19 MGL302 - Jul 19, 06:50 UTCJul 19, 07:10 UTC20m
2026-07-19 MGL302 - Jul 19, 05:40 UTCJul 19, 05:55 UTC15m
2026-07-18 MGL310 ICN → UBN Jul 18, 17:10 UTCJul 19, 03:30 UTC10h 20m
2026-07-18 MGL302 ICN → ICN Jul 18, 05:40 UTCJul 18, 15:15 UTC9h 35m
2026-07-18 MGL301 - Jul 18, 03:20 UTCJul 18, 03:45 UTC25m
2026-07-17 MGL138 FRA → UBN Jul 17, 13:15 UTCJul 17, 19:20 UTC6h 5m
2026-07-16 MGL137 - Jul 16, 16:09 UTCJul 17, 10:25 UTC18h 15m
2026-07-16 MGL137 - Jul 16, 13:20 UTCJul 17, 10:25 UTC21h 5m
2026-07-16 MGL138 FRA → UBN Jul 16, 12:55 UTCJul 17, 10:25 UTC21h 30m
2026-07-15 MGL137 ICN → FRA Jul 15, 15:40 UTCJul 16, 10:35 UTC18h 55m
2026-07-15 MGL302 - Jul 15, 05:50 UTCJul 15, 13:05 UTC7h 15m
2026-07-15 MGL301 - Jul 15, 03:00 UTCJul 15, 03:20 UTC20m
2026-07-14 MGL138 FRA → UBN Jul 14, 12:45 UTCJul 14, 18:45 UTC6h 0m
2026-07-13 MGL137 - Jul 13, 15:20 UTCJul 14, 10:40 UTC19h 20m
2026-07-13 MGL137 ICN → FRA Jul 13, 15:10 UTCJul 14, 10:40 UTC19h 30m
2026-07-13 MGL307 - Jul 13, 12:45 UTCJul 13, 13:10 UTC25m
2026-07-13 MGL302 - Jul 13, 05:55 UTCJul 13, 07:25 UTC1h 30m
2026-07-13 MGL301 - Jul 13, 03:15 UTCJul 13, 03:40 UTC25m
2026-07-12 MGL138 FRA → UBN Jul 12, 12:50 UTCJul 12, 18:50 UTC6h 0m
2026-07-11 MGL137 ICN → FRA Jul 11, 17:40 UTCJul 12, 10:25 UTC16h 45m
2026-07-11 MGL309 - Jul 11, 15:45 UTCJul 11, 16:10 UTC25m
2026-07-11 MGL302 - Jul 11, 05:45 UTCJul 11, 07:10 UTC1h 25m
2026-07-11 MGL301 - Jul 11, 03:15 UTCJul 11, 03:45 UTC30m
2026-07-10 MGL138 FRA → UBN Jul 10, 12:50 UTCJul 11, 02:25 UTC13h 35m
2026-07-09 MGL137 ICN → FRA Jul 9, 17:05 UTCJul 10, 10:45 UTC17h 40m
2026-07-09 MGL309 UBN → ICN Jul 9, 15:05 UTCJul 9, 15:25 UTC20m
2026-07-09 MGL302 - Jul 9, 05:50 UTCJul 9, 07:35 UTC1h 45m
2026-07-09 MGL301 - Jul 9, 03:55 UTCJul 9, 04:20 UTC25m
2026-07-08 MGL138 FRA → UBN Jul 8, 12:35 UTCJul 8, 18:40 UTC6h 5m
2026-07-07 MGL137 ICN → FRA Jul 7, 17:05 UTCJul 8, 10:20 UTC17h 15m
2026-07-07 MGL309 UBN → ICN Jul 7, 15:05 UTCJul 7, 15:25 UTC20m
2026-07-07 MGL502 - Jul 7, 06:15 UTCJul 7, 09:35 UTC3h 20m
2026-07-06 MGL138 FRA → UBN Jul 6, 13:20 UTCJul 7, 04:20 UTC15h 0m
2026-07-05 MGL137 - Jul 5, 15:20 UTCJul 6, 10:40 UTC19h 20m
2026-07-05 MGL137 ICN → FRA Jul 5, 15:05 UTCJul 6, 10:40 UTC19h 35m
2026-07-05 MGL307 - Jul 5, 12:50 UTCJul 5, 13:10 UTC20m

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

Mode-S 4CAA15 frequently asked

What is Mode-S code 4CAA15?
4CAA15 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-MGL.
Where is Mode-S 4CAA15 registered?
Mode-S code 4CAA15 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAA15 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 18:50 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAA15, octal 23125025, decimal 5,024,277.
What flights does 4CAA15 operate?
Mode-S 4CAA15 has broadcast 11 distinct callsigns, including MGL137, MGL302, MGL301, MGL502, MGL138.