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sensors Mode-S transponder

4CAAB4

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IMX · AIRBUS A-319

Hex
4CAAB4
Octal
23125264
Decimal
5,024,436
Country
IE
Tail
EI-IMX
Type
A319
No current signal · last broadcast Jul 26, 22:35 UTC
Flights observed
597
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 22:35 UTC

Last known position

Most recent position reported by Mode-S 4CAAB4.

Country allocation

The ICAO 24-bit address 4CAAB4 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
ITY1681 - 20 2026-07-23
ITY1676 ITA Airways 19 2026-07-24
ITY1684 - 16 2026-07-24
ITY1682 ITA Airways 16 2026-07-26
ITY1678 ITA Airways 16 2026-07-25
ITY1677 - 16 2026-07-26
ITY1675 ITA Airways 16 2026-07-25
ITY1679 - 15 2026-07-24
ITY1198 - 10 2026-07-16
ITY1197 - 9 2026-07-16
ITY1157 - 8 2026-07-15
ITY1156 ITA Airways 8 2026-07-15
ITY585 ITA Airways 7 2026-07-26
ITY582 ITA Airways 7 2026-07-26
ITY2010 ITA Airways 7 2026-07-23
ITY1742 - 7 2026-07-18
ITY1196 - 7 2026-07-16
ITY1765 - 6 2026-07-21
ITY1764 - 6 2026-07-21
ITY1650 ITA Airways 6 2026-06-03

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ITY802 FCO → ALG Jul 26, 21:20 UTCJul 26, 22:35 UTC1h 15m
2026-07-26 ITY1712 CTA → FCO Jul 26, 18:40 UTCJul 26, 19:40 UTC1h 0m
2026-07-26 ITY1733 FCO → CTA Jul 26, 16:20 UTCJul 26, 17:10 UTC50m
2026-07-26 ITY1682 FLR → FCO Jul 26, 14:30 UTCJul 26, 14:55 UTC25m
2026-07-26 ITY1677 - Jul 26, 12:50 UTCJul 26, 13:25 UTC35m
2026-07-26 ITY585 TIA → FCO Jul 26, 10:35 UTCJul 26, 11:30 UTC55m
2026-07-26 ITY582 FCO → TIA Jul 26, 08:10 UTCJul 26, 09:00 UTC50m
2026-07-25 ITY055 FCO → MAH Jul 25, 19:45 UTCJul 25, 20:40 UTC55m
2026-07-25 ITY054 - Jul 25, 16:50 UTCJul 25, 18:05 UTC1h 15m
2026-07-25 ITY1766 - Jul 25, 14:35 UTCJul 25, 15:20 UTC45m
2026-07-25 ITY1799 - Jul 25, 12:30 UTCJul 25, 13:00 UTC30m
2026-07-25 ITY1678 FLR → FCO Jul 25, 10:15 UTCJul 25, 10:45 UTC30m
2026-07-25 ITY1675 FCO → FLR Jul 25, 08:45 UTCJul 25, 09:15 UTC30m
2026-07-25 ITY1PR NAP → FCO Jul 25, 05:10 UTCJul 25, 05:35 UTC25m
2026-07-24 ITY1267 FCO → NAP Jul 24, 21:05 UTCJul 24, 21:30 UTC25m
2026-07-24 ITY1684 FLR → FCO Jul 24, 18:45 UTCJul 24, 19:25 UTC40m
2026-07-24 ITY1679 FCO → FLR Jul 24, 17:20 UTCJul 24, 17:50 UTC30m
2026-07-24 ITY1360 TRS → FCO Jul 24, 15:00 UTCJul 24, 15:50 UTC50m
2026-07-24 ITY1365 - Jul 24, 13:10 UTCJul 24, 13:55 UTC45m
2026-07-24 ITY1678 FLR → FCO Jul 24, 10:30 UTCJul 24, 11:00 UTC30m
2026-07-24 ITY1675 FCO → FLR Jul 24, 08:50 UTCJul 24, 09:25 UTC35m
2026-07-24 ITY1676 FLR → FCO Jul 24, 04:35 UTCJul 24, 05:00 UTC25m
2026-07-23 ITY1681 - Jul 23, 20:20 UTCJul 23, 20:45 UTC25m
2026-07-23 ITY2109 - Jul 23, 17:35 UTCJul 23, 18:15 UTC40m
2026-07-23 ITY1184 SUF → LIN Jul 23, 14:40 UTCJul 23, 16:10 UTC1h 30m
2026-07-23 ITY1185 LIN → SUF Jul 23, 12:35 UTCJul 23, 13:40 UTC1h 5m
2026-07-23 ITY1648 - Jul 23, 09:55 UTCJul 23, 11:15 UTC1h 20m
2026-07-23 ITY1649 LIN → BRI Jul 23, 07:35 UTCJul 23, 08:30 UTC55m
2026-07-23 ITY2010 FCO → LIN Jul 23, 05:15 UTCJul 23, 06:05 UTC50m
2026-07-22 ITY1684 - Jul 22, 18:55 UTCJul 22, 19:25 UTC30m
2026-07-22 ITY1679 - Jul 22, 17:25 UTCJul 22, 17:55 UTC30m
2026-07-22 ITY1792 - Jul 22, 15:20 UTCJul 22, 16:05 UTC45m
2026-07-22 ITY1781 - Jul 22, 12:55 UTCJul 22, 13:40 UTC45m
2026-07-22 ITY1678 FLR → FCO Jul 22, 11:10 UTCJul 22, 11:20 UTC10m
2026-07-22 ITY1676 FLR → FCO Jul 22, 04:35 UTCJul 22, 05:05 UTC30m
2026-07-21 ITY1681 - Jul 21, 21:10 UTCJul 21, 21:50 UTC40m
2026-07-21 ITY2097 - Jul 21, 16:20 UTCJul 21, 17:10 UTC50m
2026-07-21 ITY1764 - Jul 21, 12:10 UTCJul 21, 13:35 UTC1h 25m
2026-07-21 ITY1765 - Jul 21, 08:10 UTCJul 21, 09:25 UTC1h 15m
2026-07-21 ITY3OL ORY → LIN Jul 21, 05:45 UTCJul 21, 06:50 UTC1h 5m
2026-07-20 ITY356 LIN → ORY Jul 20, 19:50 UTCJul 20, 21:00 UTC1h 10m
2026-07-20 ITY2050 - Jul 20, 17:55 UTCJul 20, 18:40 UTC45m
2026-07-20 ITY089 - Jul 20, 15:20 UTCJul 20, 16:35 UTC1h 15m
2026-07-20 ITY088 - Jul 20, 11:50 UTCJul 20, 13:20 UTC1h 30m
2026-07-20 ITY1676 FLR → FCO Jul 20, 04:40 UTCJul 20, 05:05 UTC25m
2026-07-19 ITY1681 - Jul 19, 20:45 UTCJul 19, 21:15 UTC30m
2026-07-19 ITY1684 - Jul 19, 18:00 UTCJul 19, 18:30 UTC30m
2026-07-19 ITY1679 - Jul 19, 16:10 UTCJul 19, 16:40 UTC30m
2026-07-19 ITY2071 - Jul 19, 13:45 UTCJul 19, 14:35 UTC50m
2026-07-19 ITY1718 - Jul 19, 10:30 UTCJul 19, 12:00 UTC1h 30m

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

Mode-S 4CAAB4 frequently asked

What is Mode-S code 4CAAB4?
4CAAB4 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IMX.
Where is Mode-S 4CAAB4 registered?
Mode-S code 4CAAB4 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAAB4 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAAB4, octal 23125264, decimal 5,024,436.
What flights does 4CAAB4 operate?
Mode-S 4CAAB4 has broadcast 20 distinct callsigns, including ITY1681, ITY1676, ITY1684, ITY1682, ITY1678.