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sensors Mode-S transponder

4CAFCB

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-GHB · BOEING 737-400

Hex
4CAFCB
Octal
23127713
Decimal
5,025,739
Country
IE
Tail
EI-GHB
Type
B734
No current signal · last broadcast Jul 26, 22:45 UTC
Flights observed
154
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 22:45 UTC

Last known position

Most recent position reported by Mode-S 4CAFCB.

Country allocation

The ICAO 24-bit address 4CAFCB 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
MSA61P Mistral Air 35 2026-07-21
MSA976P - 22 2026-07-22
MSA95S Mistral Air 15 2026-07-26
MSA94S - 15 2026-07-23
MSA9781 - 5 2026-06-29
MSA780 - 5 2026-06-29
MSA9893 Mistral Air 4 2026-07-24
MSA9784 - 4 2026-05-17
MSA56B Mistral Air 4 2026-04-23
MSA9709 - 3 2026-07-17
MSA92C - 3 2026-07-02
MSA83E Mistral Air 3 2026-05-04
MSA710 Mistral Air 3 2026-07-17
MSA55B Mistral Air 3 2026-04-23
MSA97C - 2 2026-07-12
MSA9798 - 2 2026-07-13
MSA9792 - 2 2026-07-03
MSA9786 Mistral Air 2 2026-04-27
MSA91C - 2 2026-07-02
MSA79F - 2 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 MSA95S VBS → BRI Jul 26, 22:20 UTCJul 26, 22:45 UTC25m
2026-07-25 MSA9725 - Jul 25, 00:05 UTCJul 25, 01:20 UTC1h 15m
2026-07-24 MSA724 - Jul 24, 22:20 UTCJul 24, 22:55 UTC35m
2026-07-24 MSA724 - Jul 24, 20:30 UTCJul 24, 21:30 UTC1h 0m
2026-07-24 MSA9893 LEJ → VBS Jul 24, 01:05 UTCJul 24, 02:20 UTC1h 15m
2026-07-23 MSA95S VBS → BRI Jul 23, 22:50 UTCJul 23, 23:50 UTC1h 0m
2026-07-23 MSA94S - Jul 23, 20:10 UTCJul 23, 21:25 UTC1h 15m
2026-07-22 MSA95S VBS → BRI Jul 22, 22:50 UTCJul 22, 23:50 UTC1h 0m
2026-07-22 MSA82E - Jul 22, 20:10 UTCJul 22, 21:05 UTC55m
2026-07-22 MSA84F - Jul 22, 18:10 UTCJul 22, 18:40 UTC30m
2026-07-22 MSA976P - Jul 22, 12:10 UTCJul 22, 12:50 UTC40m
2026-07-21 MSA61P VBS → OLB Jul 21, 23:55 UTCJul 22, 00:25 UTC30m
2026-07-21 MSA61P VBS → OLB Jul 21, 22:35 UTCJul 21, 23:15 UTC40m
2026-07-21 MSA94S - Jul 21, 20:05 UTCJul 21, 21:20 UTC1h 15m
2026-07-20 MSA995A - Jul 20, 19:30 UTCJul 20, 20:35 UTC1h 5m
2026-07-20 MSA976P - Jul 20, 01:20 UTCJul 20, 02:30 UTC1h 10m
2026-07-19 MSA61P VBS → OLB Jul 19, 23:40 UTCJul 20, 00:10 UTC30m
2026-07-19 MSA61P VBS → OLB Jul 19, 22:15 UTCJul 19, 23:00 UTC45m
2026-07-17 MSA9709 - Jul 17, 11:30 UTCJul 17, 13:10 UTC1h 40m
2026-07-17 MSA710 MXP → LGG Jul 17, 08:15 UTCJul 17, 09:45 UTC1h 30m
2026-07-17 MSA976P PMO → MXP Jul 17, 01:29 UTCJul 17, 03:05 UTC1h 35m
2026-07-16 MSA61P - Jul 16, 23:59 UTCJul 17, 00:40 UTC40m
2026-07-16 MSA94S - Jul 16, 22:40 UTCJul 16, 23:25 UTC45m
2026-07-16 MSA94S - Jul 16, 20:15 UTCJul 16, 21:30 UTC1h 15m
2026-07-15 MSA95S - Jul 15, 22:45 UTCJul 15, 23:50 UTC1h 5m
2026-07-15 MSA94S - Jul 15, 20:15 UTCJul 15, 21:30 UTC1h 15m
2026-07-14 MSA95S - Jul 14, 22:50 UTCJul 14, 23:55 UTC1h 5m
2026-07-14 MSA94S - Jul 14, 20:00 UTCJul 14, 21:20 UTC1h 20m
2026-07-14 - - Jul 14, 13:15 UTCJul 14, 13:25 UTC10m
2026-07-13 MSA95S - Jul 13, 22:45 UTCJul 13, 23:55 UTC1h 10m
2026-07-13 MSA94S - Jul 13, 20:05 UTCJul 13, 21:25 UTC1h 20m
2026-07-13 MSA9798 - Jul 13, 01:01 UTCJul 13, 01:25 UTC25m
2026-07-12 MSA97C - Jul 12, 22:40 UTCJul 12, 23:45 UTC1h 5m
2026-07-12 MSA9796 - Jul 12, 20:25 UTCJul 12, 21:55 UTC1h 30m
2026-07-12 MSA95F - Jul 12, 18:01 UTCJul 12, 18:50 UTC50m
2026-07-10 MSA9893 - Jul 10, 01:10 UTCJul 10, 02:00 UTC50m
2026-07-09 MSA95S - Jul 9, 22:45 UTCJul 9, 23:50 UTC1h 5m
2026-07-09 MSA94S - Jul 9, 20:05 UTCJul 9, 21:15 UTC1h 10m
2026-07-08 MSA95S - Jul 8, 22:50 UTCJul 8, 23:55 UTC1h 5m
2026-07-08 MSA94S - Jul 8, 20:00 UTCJul 8, 21:15 UTC1h 15m
2026-07-07 MSA95S - Jul 7, 23:05 UTCJul 8, 00:10 UTC1h 5m
2026-07-07 MSA976P - Jul 7, 01:20 UTCJul 7, 02:30 UTC1h 10m
2026-07-06 MSA61P - Jul 6, 23:30 UTCJul 7, 00:10 UTC40m
2026-07-06 MSA61P - Jul 6, 22:05 UTCJul 6, 22:50 UTC45m
2026-07-06 MSA976P - Jul 6, 15:15 UTCJul 6, 16:30 UTC1h 15m
2026-07-05 MSA61P - Jul 5, 23:05 UTCJul 5, 23:25 UTC20m
2026-07-05 MSA61P - Jul 5, 21:40 UTCJul 5, 22:25 UTC45m
2026-07-03 MSA9709 - Jul 3, 16:35 UTCJul 3, 16:55 UTC20m
2026-07-03 MSA711 - Jul 3, 13:50 UTCJul 3, 14:55 UTC1h 5m
2026-07-03 MSA710 - Jul 3, 08:05 UTCJul 3, 09:10 UTC1h 5m

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

Mode-S 4CAFCB frequently asked

What is Mode-S code 4CAFCB?
4CAFCB is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-GHB.
Where is Mode-S 4CAFCB registered?
Mode-S code 4CAFCB is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAFCB broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAFCB, octal 23127713, decimal 5,025,739.
What flights does 4CAFCB operate?
Mode-S 4CAFCB has broadcast 20 distinct callsigns, including MSA61P, MSA976P, MSA95S, MSA94S, MSA9781.