Apparatus

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sensors Mode-S transponder

4CA82B

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-FXX · BOEING 737-800

Hex
4CA82B
Octal
23124053
Decimal
5,023,787
Country
IE
Tail
EI-FXX
Type
B738
No current signal · last broadcast 6h ago
Flights observed
258
Distinct callsigns
20
Country
IE
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 4CA82B.

Country allocation

The ICAO 24-bit address 4CA82B 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
MSA56B - 21 2026-07-13
MSA55B - 21 2026-07-13
MSA92C - 20 2026-06-30
MSA91C - 20 2026-07-01
MSA79F - 20 2026-07-01
MSA9792 - 19 2026-07-01
MSA9712 - 17 2026-07-01
MSA711 - 16 2026-07-01
MSA763 Mistral Air 12 2026-07-10
MSA734 Mistral Air 12 2026-06-12
MSA9784 - 10 2026-07-01
MSA976P - 10 2026-07-10
MSA84F Mistral Air 9 2026-06-11
MSA83E Mistral Air 9 2026-06-11
MSA82E Mistral Air 9 2026-06-11
MSA61P Mistral Air 8 2026-05-15
MSA9732 - 6 2026-07-10
MSA33B - 5 2026-07-12
MSA9786 Mistral Air 3 2026-06-15
MSA86E Mistral Air 3 2026-06-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 MSA56B - Jul 13, 23:00 UTCJul 13, 23:55 UTC55m
2026-07-13 MSA55B - Jul 13, 20:20 UTCJul 13, 21:30 UTC1h 10m
2026-07-12 MSA33B - Jul 12, 21:05 UTCJul 12, 22:05 UTC1h 0m
2026-07-10 MSA976P - Jul 10, 23:10 UTCJul 11, 00:15 UTC1h 5m
2026-07-10 MSA763 VBS → CAG Jul 10, 21:20 UTCJul 10, 22:05 UTC45m
2026-07-10 MSA763 VBS → CAG Jul 10, 19:40 UTCJul 10, 20:40 UTC1h 0m
2026-07-10 MSA9732 - Jul 10, 00:55 UTCJul 10, 01:55 UTC1h 0m
2026-07-09 MSA56B - Jul 9, 22:40 UTCJul 9, 23:40 UTC1h 0m
2026-07-09 MSA55B - Jul 9, 20:35 UTCJul 9, 21:35 UTC1h 0m
2026-07-08 MSA56B - Jul 8, 23:05 UTCJul 9, 00:05 UTC1h 0m
2026-07-08 MSA55B - Jul 8, 20:30 UTCJul 8, 21:35 UTC1h 5m
2026-07-07 MSA56B - Jul 7, 23:00 UTCJul 8, 00:00 UTC1h 0m
2026-07-07 MSA55B - Jul 7, 20:20 UTCJul 7, 21:20 UTC1h 0m
2026-07-06 MSA56B - Jul 6, 23:05 UTCJul 7, 00:05 UTC1h 0m
2026-07-06 MSA55B - Jul 6, 20:55 UTCJul 6, 21:55 UTC1h 0m
2026-07-05 MSA33B - Jul 5, 21:05 UTCJul 5, 22:05 UTC1h 0m
2026-07-03 MSA976P - Jul 3, 23:10 UTCJul 4, 00:20 UTC1h 10m
2026-07-03 MSA763 VBS → CAG Jul 3, 21:15 UTCJul 3, 21:40 UTC25m
2026-07-03 MSA763 VBS → CAG Jul 3, 19:25 UTCJul 3, 20:15 UTC50m
2026-07-03 MSA9732 - Jul 3, 01:10 UTCJul 3, 02:10 UTC1h 0m
2026-07-02 MSA56B - Jul 2, 22:50 UTCJul 2, 23:55 UTC1h 5m
2026-07-02 MSA55B - Jul 2, 20:20 UTCJul 2, 21:20 UTC1h 0m
2026-07-01 MSA56B - Jul 1, 22:55 UTCJul 2, 00:00 UTC1h 5m
2026-07-01 MSA91C - Jul 1, 20:30 UTCJul 1, 21:45 UTC1h 15m
2026-07-01 MSA79F - Jul 1, 17:40 UTCJul 1, 18:30 UTC50m
2026-07-01 MSA9784 - Jul 1, 12:55 UTCJul 1, 13:30 UTC35m
2026-07-01 MSA784B - Jul 1, 11:05 UTCJul 1, 11:35 UTC30m
2026-07-01 MSA9712 - Jul 1, 07:45 UTCJul 1, 08:55 UTC1h 10m
2026-07-01 MSA711 - Jul 1, 05:50 UTCJul 1, 06:50 UTC1h 0m
2026-07-01 MSA9792 - Jul 1, 01:20 UTCJul 1, 02:10 UTC50m
2026-06-30 MSA92C - Jun 30, 22:50 UTCJul 1, 00:05 UTC1h 15m
2026-06-30 MSA91C - Jun 30, 20:20 UTCJun 30, 21:40 UTC1h 20m
2026-06-30 MSA79F - Jun 30, 18:05 UTCJun 30, 18:50 UTC45m
2026-06-30 MSA9792 - Jun 30, 01:30 UTCJun 30, 02:25 UTC55m
2026-06-29 MSA92C - Jun 29, 23:14 UTCJun 30, 00:30 UTC1h 15m
2026-06-29 MSA91C - Jun 29, 20:15 UTCJun 29, 21:50 UTC1h 35m
2026-06-29 MSA79F - Jun 29, 17:45 UTCJun 29, 18:34 UTC50m
2026-06-26 MSA9792 - Jun 26, 01:34 UTCJun 26, 02:24 UTC50m
2026-06-25 MSA92C - Jun 25, 23:05 UTCJun 26, 00:24 UTC1h 20m
2026-06-25 MSA91C CTA → VBS Jun 25, 20:34 UTCJun 25, 21:44 UTC1h 10m
2026-06-25 MSA79F - Jun 25, 18:15 UTCJun 25, 18:59 UTC45m
2026-06-25 MSA9792 - Jun 25, 04:54 UTCJun 25, 05:50 UTC55m
2026-06-25 MSA92C - Jun 25, 02:19 UTCJun 25, 03:50 UTC1h 30m
2026-06-24 MSA91C CTA → VBS Jun 24, 20:35 UTCJun 24, 21:50 UTC1h 15m
2026-06-24 MSA79F - Jun 24, 18:20 UTCJun 24, 19:10 UTC50m
2026-06-24 MSA9712 - Jun 24, 07:10 UTCJun 24, 08:14 UTC1h 5m
2026-06-24 MSA711 - Jun 24, 04:55 UTCJun 24, 05:59 UTC1h 5m
2026-06-24 MSA9792 - Jun 24, 01:14 UTCJun 24, 02:05 UTC50m
2026-06-23 MSA92C - Jun 23, 23:00 UTCJun 24, 00:15 UTC1h 15m
2026-06-23 MSA91C CTA → VBS Jun 23, 20:15 UTCJun 23, 21:34 UTC1h 20m

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

Mode-S 4CA82B frequently asked

What is Mode-S code 4CA82B?
4CA82B is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-FXX.
Where is Mode-S 4CA82B registered?
Mode-S code 4CA82B is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA82B broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA82B, octal 23124053, decimal 5,023,787.
What flights does 4CA82B operate?
Mode-S 4CA82B has broadcast 20 distinct callsigns, including MSA56B, MSA55B, MSA92C, MSA91C, MSA79F.