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sensors Mode-S transponder

4CAF20

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-TEE · AIRBUS A220-300

Hex
4CAF20
Octal
23127440
Decimal
5,025,568
Country
IE
Tail
EI-TEE
Type
BCS3
No current signal · last broadcast 7h ago
Flights observed
592
Distinct callsigns
20
Country
IE
Last broadcast
7h ago

Last known position

Most recent position reported by Mode-S 4CAF20.

Country allocation

The ICAO 24-bit address 4CAF20 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
ITY1727 - 24 2026-07-11
ITY1718 - 24 2026-07-11
ITY1768 - 22 2026-07-12
ITY1IP - 20 2026-07-11
ITY1721 - 16 2026-07-11
ITY1720 - 13 2026-07-11
ITY1286 - 8 2026-07-13
ITY1285 - 8 2026-07-13
ITY345 - 7 2026-06-29
ITY344 - 7 2026-06-29
ITY1312 - 7 2026-07-07
ITY1321 ITA Airways 6 2026-07-06
ITY2130 - 5 2026-07-01
ITY1799 - 5 2026-07-09
ITY1793 ITA Airways 5 2026-05-27
ITY1790 ITA Airways 5 2026-05-27
ITY1766 - 5 2026-07-09
ITY1731 - 5 2026-07-05
ITY1724 - 5 2026-07-03
ITY1616 - 5 2026-07-01

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ITY113 AMS → LIN Jul 13, 18:35 UTCJul 13, 19:50 UTC1h 15m
2026-07-13 ITY112 LIN → AMS Jul 13, 15:55 UTCJul 13, 17:15 UTC1h 20m
2026-07-13 ITY1786 - Jul 13, 13:30 UTCJul 13, 14:50 UTC1h 20m
2026-07-13 ITY1787 - Jul 13, 11:10 UTCJul 13, 12:15 UTC1h 5m
2026-07-13 ITY1286 - Jul 13, 06:40 UTCJul 13, 07:40 UTC1h 0m
2026-07-13 ITY1285 - Jul 13, 04:30 UTCJul 13, 05:20 UTC50m
2026-07-12 ITY1702 - Jul 12, 19:35 UTCJul 12, 21:05 UTC1h 30m
2026-07-12 ITY1701 - Jul 12, 16:55 UTCJul 12, 18:20 UTC1h 25m
2026-07-12 ITY1672 - Jul 12, 14:35 UTCJul 12, 15:45 UTC1h 10m
2026-07-12 ITY1671 - Jul 12, 12:15 UTCJul 12, 13:20 UTC1h 5m
2026-07-12 ITY1286 - Jul 12, 10:05 UTCJul 12, 11:01 UTC55m
2026-07-12 ITY1285 - Jul 12, 07:50 UTCJul 12, 08:45 UTC55m
2026-07-12 ITY1768 PMO → LIN Jul 12, 04:40 UTCJul 12, 06:01 UTC1h 20m
2026-07-11 ITY1IP LIN → PMO Jul 11, 20:05 UTCJul 11, 21:20 UTC1h 15m
2026-07-11 ITY1720 - Jul 11, 17:25 UTCJul 11, 18:50 UTC1h 25m
2026-07-11 ITY1721 - Jul 11, 14:20 UTCJul 11, 15:45 UTC1h 25m
2026-07-11 ITY1718 - Jul 11, 10:10 UTCJul 11, 11:40 UTC1h 30m
2026-07-11 ITY1727 - Jul 11, 07:00 UTCJul 11, 08:25 UTC1h 25m
2026-07-11 ITY1768 PMO → LIN Jul 11, 04:40 UTCJul 11, 05:55 UTC1h 15m
2026-07-10 ITY1769 - Jul 10, 19:00 UTCJul 10, 19:35 UTC35m
2026-07-10 ITY089 - Jul 10, 16:10 UTCJul 10, 17:25 UTC1h 15m
2026-07-10 ITY088 - Jul 10, 13:20 UTCJul 10, 14:40 UTC1h 20m
2026-07-10 ITY719 - Jul 10, 10:10 UTCJul 10, 11:55 UTC1h 45m
2026-07-10 ITY720 - Jul 10, 07:05 UTCJul 10, 08:35 UTC1h 30m
2026-07-09 ITY573 - Jul 9, 18:05 UTCJul 9, 19:05 UTC1h 0m
2026-07-09 ITY574 FCO → ZRH Jul 9, 15:40 UTCJul 9, 16:50 UTC1h 10m
2026-07-09 ITY1766 - Jul 9, 13:50 UTCJul 9, 14:40 UTC50m
2026-07-09 ITY1799 - Jul 9, 12:00 UTCJul 9, 12:40 UTC40m
2026-07-09 ITY075 - Jul 9, 04:25 UTCJul 9, 05:45 UTC1h 20m
2026-07-08 ITY078 - Jul 8, 20:20 UTCJul 8, 21:40 UTC1h 20m
2026-07-08 ITY1320 - Jul 8, 17:55 UTCJul 8, 18:30 UTC35m
2026-07-08 ITY1317 - Jul 8, 16:10 UTCJul 8, 16:50 UTC40m
2026-07-08 ITY1622 BDS → FCO Jul 8, 13:40 UTCJul 8, 14:35 UTC55m
2026-07-08 ITY1619 - Jul 8, 11:45 UTCJul 8, 12:40 UTC55m
2026-07-08 ITY1358 - Jul 8, 09:25 UTCJul 8, 10:10 UTC45m
2026-07-08 ITY1357 - Jul 8, 07:30 UTCJul 8, 08:20 UTC50m
2026-07-08 ITY1162 - Jul 8, 04:20 UTCJul 8, 05:10 UTC50m
2026-07-07 ITY1173 - Jul 7, 20:25 UTCJul 7, 21:10 UTC45m
2026-07-07 ITY573 - Jul 7, 18:00 UTCJul 7, 19:05 UTC1h 5m
2026-07-07 ITY574 - Jul 7, 15:40 UTCJul 7, 16:50 UTC1h 10m
2026-07-07 ITY1766 - Jul 7, 13:25 UTCJul 7, 14:20 UTC55m
2026-07-07 ITY1799 - Jul 7, 11:05 UTCJul 7, 11:50 UTC45m
2026-07-07 ITY1312 - Jul 7, 04:45 UTCJul 7, 05:20 UTC35m
2026-07-06 ITY1321 FCO → BLQ Jul 6, 20:40 UTCJul 6, 21:25 UTC45m
2026-07-06 ITY079 BCN → FCO Jul 6, 15:30 UTCJul 6, 16:50 UTC1h 20m
2026-07-06 ITY076 FCO → BCN Jul 6, 12:55 UTCJul 6, 14:15 UTC1h 20m
2026-07-06 ITY585 - Jul 6, 10:05 UTCJul 6, 11:05 UTC1h 0m
2026-07-06 ITY582 - Jul 6, 07:45 UTCJul 6, 08:35 UTC50m
2026-07-06 ITY1778 - Jul 6, 04:30 UTCJul 6, 05:15 UTC45m
2026-07-05 ITY1IP - Jul 5, 20:25 UTCJul 5, 21:30 UTC1h 5m

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

Mode-S 4CAF20 frequently asked

What is Mode-S code 4CAF20?
4CAF20 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-TEE.
Where is Mode-S 4CAF20 registered?
Mode-S code 4CAF20 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAF20 broadcasting right now?
No active broadcast right now. Last signal was 7h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAF20, octal 23127440, decimal 5,025,568.
What flights does 4CAF20 operate?
Mode-S 4CAF20 has broadcast 20 distinct callsigns, including ITY1727, ITY1718, ITY1768, ITY1IP, ITY1721.