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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
Broadcasting now · callsign ITY721 · 9,975 ft
Flights observed
517
Distinct callsigns
20
Country
IE
Last broadcast
3h ago

Current position

4CAAB4 is currently broadcasting. Map zoomed to live position.

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 - 16 2026-07-13
ITY1682 ITA Airways 15 2026-07-08
ITY1677 - 15 2026-07-08
ITY1676 - 15 2026-07-14
ITY1675 - 14 2026-07-12
ITY1678 - 13 2026-07-12
ITY1684 - 12 2026-07-12
ITY1679 - 11 2026-07-12
ITY1198 ITA Airways 9 2026-06-19
ITY1197 ITA Airways 8 2026-06-19
ITY1157 - 7 2026-07-12
ITY1156 ITA Airways 7 2026-07-12
ITY585 - 6 2026-07-08
ITY582 - 6 2026-07-08
ITY1742 ITA Airways 6 2026-05-26
ITY1650 ITA Airways 6 2026-06-03
ITY1639 ITA Airways 6 2026-06-03
ITY1196 ITA Airways 6 2026-05-26
ITY3LO ITA Airways 5 2026-05-24
ITY353 ITA Airways 5 2026-05-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ITY718 FCO → ATH Jul 14, 13:55 UTCJul 14, 15:30 UTC1h 35m
2026-07-14 ITY085 - Jul 14, 10:55 UTCJul 14, 12:15 UTC1h 20m
2026-07-14 ITY084 - Jul 14, 08:25 UTCJul 14, 09:50 UTC1h 25m
2026-07-14 ITY1676 - Jul 14, 04:25 UTCJul 14, 04:50 UTC25m
2026-07-13 ITY1681 - Jul 13, 20:25 UTCJul 13, 20:55 UTC30m
2026-07-13 ITY885 - Jul 13, 17:40 UTCJul 13, 18:50 UTC1h 10m
2026-07-13 ITY884 - Jul 13, 15:45 UTCJul 13, 16:45 UTC1h 0m
2026-07-13 ITY1800 - Jul 13, 09:35 UTCJul 13, 10:25 UTC50m
2026-07-13 ITY1801 - Jul 13, 07:50 UTCJul 13, 08:30 UTC40m
2026-07-13 ITY1676 - Jul 13, 04:35 UTCJul 13, 05:05 UTC30m
2026-07-12 ITY1681 - Jul 12, 20:10 UTCJul 12, 20:45 UTC35m
2026-07-12 ITY1684 - Jul 12, 17:10 UTCJul 12, 17:35 UTC25m
2026-07-12 ITY1679 - Jul 12, 15:35 UTCJul 12, 16:10 UTC35m
2026-07-12 ITY1156 REG → FCO Jul 12, 13:15 UTCJul 12, 14:05 UTC50m
2026-07-12 ITY1157 - Jul 12, 11:35 UTCJul 12, 12:20 UTC45m
2026-07-12 ITY1678 - Jul 12, 09:45 UTCJul 12, 10:15 UTC30m
2026-07-12 ITY1675 - Jul 12, 08:10 UTCJul 12, 08:45 UTC35m
2026-07-11 ITY1684 - Jul 11, 17:15 UTCJul 11, 17:45 UTC30m
2026-07-11 ITY1679 - Jul 11, 15:35 UTCJul 11, 16:15 UTC40m
2026-07-11 ITY1800 - Jul 11, 09:15 UTCJul 11, 10:05 UTC50m
2026-07-11 ITY1801 - Jul 11, 07:30 UTCJul 11, 08:10 UTC40m
2026-07-10 ITY1BC BDS → FCO Jul 10, 18:00 UTCJul 10, 19:00 UTC1h 0m
2026-07-10 ITY1623 FCO → BDS Jul 10, 16:20 UTCJul 10, 17:10 UTC50m
2026-07-10 ITY081 - Jul 10, 11:35 UTCJul 10, 12:50 UTC1h 15m
2026-07-10 ITY080 - Jul 10, 09:15 UTCJul 10, 10:25 UTC1h 10m
2026-07-10 ITY1676 - Jul 10, 04:25 UTCJul 10, 04:50 UTC25m
2026-07-09 ITY1681 - Jul 9, 20:25 UTCJul 9, 20:55 UTC30m
2026-07-09 ITY1156 REG → FCO Jul 9, 13:15 UTCJul 9, 14:15 UTC1h 0m
2026-07-09 ITY1157 - Jul 9, 11:35 UTCJul 9, 12:25 UTC50m
2026-07-09 ITY1678 - Jul 9, 09:45 UTCJul 9, 10:10 UTC25m
2026-07-09 ITY1675 - Jul 9, 08:15 UTCJul 9, 08:50 UTC35m
2026-07-09 ITY1PR - Jul 9, 04:40 UTCJul 9, 05:10 UTC30m
2026-07-08 ITY1267 - Jul 8, 20:15 UTCJul 8, 20:40 UTC25m
2026-07-08 ITY1BC BDS → FCO Jul 8, 17:15 UTCJul 8, 18:10 UTC55m
2026-07-08 ITY1623 FCO → BDS Jul 8, 15:40 UTCJul 8, 16:30 UTC50m
2026-07-08 ITY1682 FLR → FCO Jul 8, 13:40 UTCJul 8, 14:10 UTC30m
2026-07-08 ITY1677 - Jul 8, 12:25 UTCJul 8, 12:50 UTC25m
2026-07-08 ITY585 - Jul 8, 10:15 UTCJul 8, 11:10 UTC55m
2026-07-08 ITY582 - Jul 8, 07:45 UTCJul 8, 08:40 UTC55m
2026-07-08 ITY1460 - Jul 8, 04:25 UTCJul 8, 05:05 UTC40m
2026-07-07 ITY1473 - Jul 7, 20:20 UTCJul 7, 21:00 UTC40m
2026-07-07 ITY1BC BDS → FCO Jul 7, 17:35 UTCJul 7, 18:30 UTC55m
2026-07-07 ITY1623 FCO → BDS Jul 7, 15:45 UTCJul 7, 16:30 UTC45m
2026-07-07 ITY1682 FLR → FCO Jul 7, 13:55 UTCJul 7, 14:25 UTC30m
2026-07-07 ITY1677 - Jul 7, 12:25 UTCJul 7, 12:50 UTC25m
2026-07-07 ITY1676 - Jul 7, 04:25 UTCJul 7, 04:55 UTC30m
2026-07-06 ITY1681 FCO → FLR Jul 6, 20:40 UTCJul 6, 21:15 UTC35m
2026-07-06 ITY1606 - Jul 6, 17:40 UTCJul 6, 18:30 UTC50m
2026-07-06 ITY1607 - Jul 6, 16:00 UTCJul 6, 16:45 UTC45m
2026-07-06 ITY9927 TRN → FCO Jul 6, 13:05 UTCJul 6, 13:35 UTC30m

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?
Yes. Mode-S 4CAAB4 is currently airborne.
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, ITY1682, ITY1677, ITY1676, ITY1675.