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sensors Mode-S transponder

4CAD5C

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HHT · AIRBUS A220-100

Hex
4CAD5C
Octal
23126534
Decimal
5,025,116
Country
IE
Tail
EI-HHT
Type
BCS1
No current signal · last broadcast 10h ago
Flights observed
593
Distinct callsigns
20
Country
IE
Last broadcast
10h ago

Last known position

Most recent position reported by Mode-S 4CAD5C.

Country allocation

The ICAO 24-bit address 4CAD5C 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
ITY1777 - 12 2026-07-01
ITY1739 - 11 2026-07-05
ITY1782 - 10 2026-07-01
ITY1730 ITA Airways 10 2026-07-01
ITY1363 - 9 2026-07-02
ITY1356 - 9 2026-07-03
ITY577 - 7 2026-07-12
ITY574 - 7 2026-07-01
ITY573 - 7 2026-07-01
ITY572 - 7 2026-07-13
ITY571 - 7 2026-07-13
ITY2013 - 7 2026-07-06
ITY1365 - 7 2026-07-02
ITY6BO - 6 2026-07-02
ITY578 - 6 2026-07-12
ITY1PR - 6 2026-07-07
ITY1625 ITA Airways 6 2026-06-10
ITY1603 - 6 2026-07-01
ITY1428 - 6 2026-07-13
ITY1417 - 6 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ITY343 - Jul 14, 09:50 UTCJul 14, 10:35 UTC45m
2026-07-14 ITY348 - Jul 14, 07:50 UTCJul 14, 08:45 UTC55m
2026-07-13 ITY1364 - Jul 13, 18:45 UTCJul 13, 19:25 UTC40m
2026-07-13 ITY1359 - Jul 13, 17:05 UTCJul 13, 17:50 UTC45m
2026-07-13 ITY1428 - Jul 13, 13:50 UTCJul 13, 14:50 UTC1h 0m
2026-07-13 ITY1417 - Jul 13, 11:50 UTCJul 13, 12:45 UTC55m
2026-07-13 ITY571 - Jul 13, 09:25 UTCJul 13, 10:25 UTC1h 0m
2026-07-13 ITY572 - Jul 13, 07:01 UTCJul 13, 08:10 UTC1h 10m
2026-07-12 ITY577 - Jul 12, 18:05 UTCJul 12, 19:05 UTC1h 0m
2026-07-12 ITY578 FCO → GVA Jul 12, 15:25 UTCJul 12, 16:40 UTC1h 15m
2026-07-12 ITY1766 - Jul 12, 12:55 UTCJul 12, 13:40 UTC45m
2026-07-12 ITY1799 - Jul 12, 11:10 UTCJul 12, 11:40 UTC30m
2026-07-12 ITY1710 - Jul 12, 08:55 UTCJul 12, 09:50 UTC55m
2026-07-12 ITY1709 - Jul 12, 06:35 UTCJul 12, 07:35 UTC1h 0m
2026-07-11 ITY433 MUC → FCO Jul 11, 17:25 UTCJul 11, 18:35 UTC1h 10m
2026-07-11 ITY436 - Jul 11, 14:55 UTCJul 11, 16:05 UTC1h 10m
2026-07-11 ITY2049 - Jul 11, 12:05 UTCJul 11, 12:55 UTC50m
2026-07-11 ITY1747 - Jul 11, 08:15 UTCJul 11, 09:40 UTC1h 25m
2026-07-11 ITY1746 - Jul 11, 05:35 UTCJul 11, 07:00 UTC1h 25m
2026-07-10 ITY1298 - Jul 10, 19:40 UTCJul 10, 20:35 UTC55m
2026-07-10 ITY1291 - Jul 10, 17:30 UTCJul 10, 18:25 UTC55m
2026-07-10 ITY1184 - Jul 10, 15:00 UTCJul 10, 16:20 UTC1h 20m
2026-07-10 ITY1185 - Jul 10, 12:40 UTCJul 10, 14:00 UTC1h 20m
2026-07-10 ITY121 AMS → LIN Jul 10, 10:05 UTCJul 10, 11:20 UTC1h 15m
2026-07-10 ITY120 LIN → AMS Jul 10, 07:30 UTCJul 10, 08:55 UTC1h 25m
2026-07-10 ITY1176 - Jul 10, 04:50 UTCJul 10, 06:05 UTC1h 15m
2026-07-09 ITY1177 - Jul 9, 20:05 UTCJul 9, 21:25 UTC1h 20m
2026-07-09 ITY453 - Jul 9, 18:15 UTCJul 9, 19:00 UTC45m
2026-07-09 ITY452 LIN → MUC Jul 9, 16:10 UTCJul 9, 17:00 UTC50m
2026-07-09 ITY1786 PMO → LIN Jul 9, 13:45 UTCJul 9, 15:00 UTC1h 15m
2026-07-09 ITY1787 LIN → PMO Jul 9, 11:00 UTCJul 9, 12:25 UTC1h 25m
2026-07-09 ITY1286 - Jul 9, 06:55 UTCJul 9, 07:50 UTC55m
2026-07-09 ITY1285 - Jul 9, 04:35 UTCJul 9, 05:25 UTC50m
2026-07-08 ITY311 - Jul 8, 20:10 UTCJul 8, 21:15 UTC1h 5m
2026-07-08 ITY358 - Jul 8, 17:50 UTCJul 8, 19:05 UTC1h 15m
2026-07-08 ITY1704 CTA → LIN Jul 8, 14:55 UTCJul 8, 16:30 UTC1h 35m
2026-07-08 ITY1723 - Jul 8, 12:15 UTCJul 8, 13:40 UTC1h 25m
2026-07-08 ITY351 ORY → LIN Jul 8, 09:30 UTCJul 8, 10:40 UTC1h 10m
2026-07-08 ITY350 - Jul 8, 06:45 UTCJul 8, 07:55 UTC1h 10m
2026-07-08 ITY1278 - Jul 8, 04:40 UTCJul 8, 05:40 UTC1h 0m
2026-07-07 ITY1297 - Jul 7, 19:30 UTCJul 7, 20:20 UTC50m
2026-07-07 ITY8720 - Jul 7, 17:30 UTCJul 7, 18:35 UTC1h 5m
2026-07-07 ITY8721 LIN → PMO Jul 7, 14:50 UTCJul 7, 16:05 UTC1h 15m
2026-07-07 ITY2044 - Jul 7, 12:35 UTCJul 7, 13:25 UTC50m
2026-07-07 ITY1PR - Jul 7, 06:00 UTCJul 7, 06:40 UTC40m
2026-07-06 ITY1267 - Jul 6, 20:35 UTCJul 6, 21:05 UTC30m
2026-07-06 ITY1608 BRI → FCO Jul 6, 17:25 UTCJul 6, 18:10 UTC45m
2026-07-06 ITY1609 FCO → BRI Jul 6, 15:35 UTCJul 6, 16:25 UTC50m
2026-07-06 ITY2045 - Jul 6, 09:45 UTCJul 6, 10:30 UTC45m
2026-07-06 ITY2028 - Jul 6, 07:25 UTCJul 6, 08:15 UTC50m

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

Mode-S 4CAD5C frequently asked

What is Mode-S code 4CAD5C?
4CAD5C is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HHT.
Where is Mode-S 4CAD5C registered?
Mode-S code 4CAD5C is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAD5C broadcasting right now?
No active broadcast right now. Last signal was 10h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAD5C, octal 23126534, decimal 5,025,116.
What flights does 4CAD5C operate?
Mode-S 4CAD5C has broadcast 20 distinct callsigns, including ITY1777, ITY1739, ITY1782, ITY1730, ITY1363.