Apparatus

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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 12h ago
Flights observed
125
Distinct callsigns
20
Country
IE
Last broadcast
12h ago

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 - 30 2026-07-06
MSA976P - 19 2026-07-07
MSA95S - 10 2026-07-13
MSA94S - 9 2026-07-13
MSA9781 - 5 2026-06-29
MSA780 - 5 2026-06-29
MSA9784 - 4 2026-05-17
MSA56B Mistral Air 4 2026-04-23
MSA9893 - 3 2026-07-10
MSA92C - 3 2026-07-02
MSA83E Mistral Air 3 2026-05-04
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
MSA9709 - 2 2026-07-03
MSA91C - 2 2026-07-02
MSA79F - 2 2026-07-02
MSA710 - 2 2026-07-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
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
2026-07-03 MSA9792 - Jul 3, 01:00 UTCJul 3, 02:25 UTC1h 25m
2026-07-02 MSA92C - Jul 2, 22:40 UTCJul 3, 00:00 UTC1h 20m
2026-07-02 MSA91C - Jul 2, 20:10 UTCJul 2, 21:30 UTC1h 20m
2026-07-02 MSA79F - Jul 2, 18:00 UTCJul 2, 18:45 UTC45m
2026-07-02 MSA976P - Jul 2, 01:25 UTCJul 2, 02:00 UTC35m
2026-07-01 MSA61P - Jul 1, 23:50 UTCJul 2, 00:30 UTC40m
2026-07-01 MSA61P - Jul 1, 22:05 UTCJul 1, 22:50 UTC45m
2026-07-01 MSA976P - Jul 1, 01:25 UTCJul 1, 02:35 UTC1h 10m
2026-06-30 MSA61P - Jun 30, 23:30 UTCJul 1, 00:10 UTC40m
2026-06-30 MSA61P - Jun 30, 22:05 UTCJun 30, 22:50 UTC45m
2026-06-29 MSA976P - Jun 29, 23:05 UTCJun 29, 23:49 UTC45m
2026-06-29 MSA61P - Jun 29, 21:05 UTCJun 29, 22:00 UTC55m
2026-06-29 MSA9781 - Jun 29, 18:34 UTCJun 29, 19:35 UTC1h 0m
2026-06-29 MSA780 - Jun 29, 16:39 UTCJun 29, 17:14 UTC35m
2026-06-29 MSA976P OLB → FCO Jun 29, 00:24 UTCJun 29, 00:54 UTC30m
2026-06-28 MSA61P - Jun 28, 21:30 UTCJun 28, 22:24 UTC55m
2026-06-28 MSA9781 - Jun 28, 18:34 UTCJun 28, 19:34 UTC1h 0m
2026-06-28 MSA780 - Jun 28, 16:45 UTCJun 28, 17:10 UTC25m
2026-06-25 MSA976P - Jun 25, 22:24 UTCJun 25, 22:54 UTC30m
2026-06-25 MSA61P - Jun 25, 20:59 UTCJun 25, 21:40 UTC40m
2026-06-25 MSA9781 - Jun 25, 18:10 UTCJun 25, 19:05 UTC55m
2026-06-25 MSA780 - Jun 25, 16:39 UTCJun 25, 17:14 UTC35m
2026-06-25 MSA9711 FCO → MIR Jun 25, 13:59 UTCJun 25, 14:34 UTC35m
2026-06-25 MSA710 - Jun 25, 08:55 UTCJun 25, 10:45 UTC1h 50m
2026-06-25 MSA9709 - Jun 25, 05:25 UTCJun 25, 07:05 UTC1h 40m
2026-06-24 MSA976P - Jun 24, 22:29 UTCJun 24, 23:00 UTC30m
2026-06-24 MSA61P - Jun 24, 20:54 UTCJun 24, 21:50 UTC55m
2026-06-24 MSA9781 - Jun 24, 18:09 UTCJun 24, 19:04 UTC55m
2026-06-24 MSA780 - Jun 24, 16:29 UTCJun 24, 17:05 UTC35m

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 12h ago.
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.