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sensors Mode-S transponder

4CAD53

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HHJ · AIRBUS A220-300

Hex
4CAD53
Octal
23126523
Decimal
5,025,107
Country
IE
Tail
EI-HHJ
Type
BCS3
Broadcasting now · callsign ITY731 · 37,975 ft
Flights observed
170
Distinct callsigns
20
Country
IE
Last broadcast
21d ago

Current position

4CAD53 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CAD53 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
ITY1473 ITA Airways 6 2026-07-26
ITY1460 ITA Airways 5 2026-07-25
ITY1363 - 5 2026-07-15
ITY1358 ITA Airways 5 2026-07-21
ITY1357 - 5 2026-07-21
ITY1356 - 5 2026-07-16
ITY1432 ITA Airways 4 2026-07-26
ITY1431 ITA Airways 4 2026-07-25
ITY574 - 3 2026-07-17
ITY573 - 3 2026-07-17
ITY355 - 3 2026-07-18
ITY354 - 3 2026-07-18
ITY345 ITA Airways 3 2026-07-21
ITY344 ITA Airways 3 2026-07-21
ITY1466 ITA Airways 3 2026-07-24
ITY1463 ITA Airways 3 2026-07-24
ITY1435 - 3 2026-07-24
ITY1430 - 3 2026-07-24
ITY1421 - 3 2026-07-23
ITY1412 - 3 2026-07-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ITY1473 FCO → VCE Jul 26, 21:20 UTCJul 26, 22:00 UTC40m
2026-07-26 ITY407 FRA → FCO Jul 26, 17:15 UTCJul 26, 18:30 UTC1h 15m
2026-07-26 ITY404 FCO → FRA Jul 26, 14:20 UTCJul 26, 16:00 UTC1h 40m
2026-07-26 ITY159 BRU → FCO Jul 26, 10:55 UTCJul 26, 12:30 UTC1h 35m
2026-07-26 ITY156 FCO → BRU Jul 26, 08:00 UTCJul 26, 09:50 UTC1h 50m
2026-07-26 ITY1432 TRN → FCO Jul 26, 05:00 UTCJul 26, 05:55 UTC55m
2026-07-25 ITY1431 FCO → TRN Jul 25, 20:25 UTCJul 25, 21:20 UTC55m
2026-07-25 ITY1712 CTA → FCO Jul 25, 17:50 UTCJul 25, 18:45 UTC55m
2026-07-25 ITY1733 FCO → CTA Jul 25, 15:50 UTCJul 25, 16:35 UTC45m
2026-07-25 ITY1616 BRI → FCO Jul 25, 13:40 UTCJul 25, 14:25 UTC45m
2026-07-25 ITY1613 FCO → BRI Jul 25, 12:00 UTCJul 25, 12:30 UTC30m
2026-07-25 ITY1800 TPS → FCO Jul 25, 09:30 UTCJul 25, 10:10 UTC40m
2026-07-25 ITY1801 FCO → TPS Jul 25, 07:45 UTCJul 25, 08:10 UTC25m
2026-07-25 ITY1460 VCE → FCO Jul 25, 04:25 UTCJul 25, 05:05 UTC40m
2026-07-24 ITY1473 FCO → VCE Jul 24, 21:50 UTCJul 24, 22:30 UTC40m
2026-07-24 ITY1430 TRN → FCO Jul 24, 18:55 UTCJul 24, 19:55 UTC1h 0m
2026-07-24 ITY1435 - Jul 24, 17:10 UTCJul 24, 18:05 UTC55m
2026-07-24 ITY1462 - Jul 24, 14:45 UTCJul 24, 15:35 UTC50m
2026-07-24 ITY1475 FCO → VCE Jul 24, 12:40 UTCJul 24, 13:25 UTC45m
2026-07-24 ITY1466 VCE → FCO Jul 24, 10:00 UTCJul 24, 10:45 UTC45m
2026-07-24 ITY1463 FCO → VCE Jul 24, 07:55 UTCJul 24, 08:50 UTC55m
2026-07-24 ITY341 NCE → FCO Jul 24, 05:05 UTCJul 24, 05:45 UTC40m
2026-07-23 ITY340 - Jul 23, 21:25 UTCJul 23, 22:15 UTC50m
2026-07-23 ITY1430 - Jul 23, 19:10 UTCJul 23, 20:00 UTC50m
2026-07-23 ITY1435 - Jul 23, 17:10 UTCJul 23, 18:10 UTC1h 0m
2026-07-23 ITY1792 - Jul 23, 14:50 UTCJul 23, 15:45 UTC55m
2026-07-23 ITY1781 - Jul 23, 12:35 UTCJul 23, 13:05 UTC30m
2026-07-23 ITY1412 - Jul 23, 09:35 UTCJul 23, 10:25 UTC50m
2026-07-23 ITY1421 - Jul 23, 07:35 UTCJul 23, 08:30 UTC55m
2026-07-23 ITY1460 VCE → FCO Jul 23, 04:25 UTCJul 23, 05:05 UTC40m
2026-07-22 ITY1473 FCO → VCE Jul 22, 20:30 UTCJul 22, 21:10 UTC40m
2026-07-22 ITY1BC BDS → FCO Jul 22, 18:05 UTCJul 22, 19:00 UTC55m
2026-07-22 ITY1623 FCO → BDS Jul 22, 16:10 UTCJul 22, 17:00 UTC50m
2026-07-22 ITY1428 - Jul 22, 14:10 UTCJul 22, 15:00 UTC50m
2026-07-22 ITY1417 - Jul 22, 12:20 UTCJul 22, 13:15 UTC55m
2026-07-22 ITY1432 TRN → FCO Jul 22, 04:50 UTCJul 22, 05:25 UTC35m
2026-07-21 ITY1431 - Jul 21, 20:40 UTCJul 21, 21:35 UTC55m
2026-07-21 ITY1480 - Jul 21, 18:35 UTCJul 21, 19:20 UTC45m
2026-07-21 ITY1467 - Jul 21, 16:35 UTCJul 21, 17:20 UTC45m
2026-07-21 ITY345 NCE → FCO Jul 21, 14:20 UTCJul 21, 15:05 UTC45m
2026-07-21 ITY344 FCO → NCE Jul 21, 12:00 UTCJul 21, 12:55 UTC55m
2026-07-21 ITY1358 TRS → FCO Jul 21, 09:25 UTCJul 21, 10:20 UTC55m
2026-07-21 ITY1357 - Jul 21, 07:30 UTCJul 21, 08:20 UTC50m
2026-07-21 ITY1432 TRN → FCO Jul 21, 04:55 UTCJul 21, 05:45 UTC50m
2026-07-20 ITY1431 - Jul 20, 20:35 UTCJul 20, 21:30 UTC55m
2026-07-20 ITY1430 - Jul 20, 17:50 UTCJul 20, 18:35 UTC45m
2026-07-20 ITY1435 - Jul 20, 15:50 UTCJul 20, 16:45 UTC55m
2026-07-20 ITY1270 - Jul 20, 14:00 UTCJul 20, 14:30 UTC30m
2026-07-20 ITY1269 - Jul 20, 11:50 UTCJul 20, 12:40 UTC50m
2026-07-20 ITY1358 TRS → FCO Jul 20, 09:30 UTCJul 20, 10:15 UTC45m

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

Mode-S 4CAD53 frequently asked

What is Mode-S code 4CAD53?
4CAD53 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HHJ.
Where is Mode-S 4CAD53 registered?
Mode-S code 4CAD53 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAD53 broadcasting right now?
Yes. Mode-S 4CAD53 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAD53, octal 23126523, decimal 5,025,107.
What flights does 4CAD53 operate?
Mode-S 4CAD53 has broadcast 20 distinct callsigns, including ITY1473, ITY1460, ITY1363, ITY1358, ITY1357.