Apparatus

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sensors Mode-S transponder

4CA4B0

ICAO 24-bit transponder address · allocated to Ireland

Hex
4CA4B0
Octal
23122260
Decimal
5,022,896
Country
IE
No current signal · last broadcast 1h ago
Flights observed
157
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CA4B0.

Country allocation

The ICAO 24-bit address 4CA4B0 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
ITY673 ITA Airways 12 2026-07-07
ITY672 - 11 2026-07-06
ITY6KC - 10 2026-07-14
ITY650 - 10 2026-07-10
ITY679 ITA Airways 9 2026-06-10
ITY675 - 9 2026-06-22
ITY651 - 9 2026-07-10
ITY610 - 9 2026-07-14
ITY678 ITA Airways 8 2026-06-10
ITY674 - 6 2026-06-21
ITY615 - 6 2026-07-09
ITY603 - 6 2026-07-08
ITY602 - 6 2026-07-08
ITY614 - 5 2026-07-09
ITY629 - 4 2026-07-11
ITY628 - 4 2026-07-11
ITY609 - 4 2026-06-29
ITY608 - 4 2026-06-29
ITY641 - 3 2026-07-04
ITY640 - 3 2026-07-04

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ITY610 - Jul 14, 13:40 UTCJul 14, 16:00 UTC2h 20m
2026-07-14 ITY6KC - Jul 14, 01:35 UTCJul 14, 09:20 UTC7h 45m
2026-07-13 ITY610 - Jul 13, 14:00 UTCJul 13, 22:40 UTC8h 40m
2026-07-12 ITY637 - Jul 12, 23:10 UTCJul 13, 09:45 UTC10h 35m
2026-07-12 ITY636 - Jul 12, 09:15 UTCJul 12, 20:40 UTC11h 25m
2026-07-11 ITY629 - Jul 11, 21:40 UTCJul 12, 06:25 UTC8h 45m
2026-07-11 ITY628 - Jul 11, 09:35 UTCJul 11, 19:05 UTC9h 30m
2026-07-10 ITY651 YYZ → FCO Jul 10, 21:30 UTCJul 11, 05:31 UTC8h 0m
2026-07-10 ITY650 - Jul 10, 09:20 UTCJul 10, 18:15 UTC8h 55m
2026-07-09 ITY615 BOS → FCO Jul 9, 23:15 UTCJul 10, 06:45 UTC7h 30m
2026-07-09 ITY614 - Jul 9, 12:25 UTCJul 9, 20:50 UTC8h 25m
2026-07-08 ITY603 JFK → FCO Jul 8, 22:30 UTCJul 9, 06:30 UTC8h 0m
2026-07-08 ITY602 - Jul 8, 10:40 UTCJul 8, 19:10 UTC8h 30m
2026-07-07 ITY673 GIG → FCO Jul 7, 17:50 UTCJul 8, 04:40 UTC10h 50m
2026-07-06 ITY672 - Jul 6, 22:20 UTCJul 7, 09:20 UTC11h 0m
2026-07-06 ITY759 - Jul 6, 05:40 UTCJul 6, 17:15 UTC11h 35m
2026-07-05 ITY758 - Jul 5, 13:55 UTCJul 6, 00:20 UTC10h 25m
2026-07-04 ITY641 SFO → FCO Jul 4, 23:25 UTCJul 5, 10:35 UTC11h 10m
2026-07-04 ITY640 - Jul 4, 08:25 UTCJul 4, 21:15 UTC12h 50m
2026-07-03 ITY673 GIG → FCO Jul 3, 17:40 UTCJul 4, 04:10 UTC10h 30m
2026-07-02 ITY672 - Jul 2, 21:15 UTCJul 3, 07:40 UTC10h 25m
2026-07-02 ITY6MO - Jul 2, 00:25 UTCJul 2, 10:20 UTC9h 55m
2026-07-01 ITY630 FCO → MIA Jul 1, 09:40 UTCJul 1, 20:20 UTC10h 40m
2026-06-30 ITY651 YYZ → FCO Jun 30, 21:40 UTCJul 1, 05:35 UTC7h 55m
2026-06-30 ITY650 - Jun 30, 08:50 UTCJun 30, 17:50 UTC9h 0m
2026-06-29 ITY609 - Jun 29, 20:40 UTCJun 30, 04:05 UTC7h 25m
2026-06-29 ITY608 - Jun 29, 08:50 UTCJun 29, 17:24 UTC8h 35m
2026-06-28 ITY609 JFK → FCO Jun 28, 19:49 UTCJun 29, 03:34 UTC7h 45m
2026-06-28 ITY608 - Jun 28, 08:39 UTCJun 28, 17:25 UTC8h 45m
2026-06-27 ITY615 BOS → FCO Jun 27, 21:15 UTCJun 28, 04:25 UTC7h 10m
2026-06-27 ITY614 - Jun 27, 08:55 UTCJun 27, 17:14 UTC8h 20m
2026-06-26 ITY651 YYZ → FCO Jun 26, 21:24 UTCJun 27, 05:19 UTC7h 55m
2026-06-26 ITY650 - Jun 26, 09:24 UTCJun 26, 18:15 UTC8h 50m
2026-06-25 ITY603 - Jun 25, 22:49 UTCJun 26, 06:35 UTC7h 45m
2026-06-25 ITY602 - Jun 25, 07:54 UTCJun 25, 16:50 UTC8h 55m
2026-06-22 ITY675 - Jun 22, 17:25 UTCJun 23, 04:50 UTC11h 25m
2026-06-21 ITY674 - Jun 21, 20:54 UTCJun 22, 07:54 UTC11h 0m
2026-06-21 ITY633 MIA → FCO Jun 21, 05:40 UTCJun 21, 14:50 UTC9h 10m
2026-06-21 ITY632 FCO → MIA Jun 21, 03:00 UTCJun 21, 03:40 UTC40m
2026-06-20 ITY632 FCO → MIA Jun 20, 13:55 UTCJun 21, 01:25 UTC11h 30m
2026-06-20 ITY6KC JFK → FCO Jun 20, 02:00 UTCJun 20, 09:34 UTC7h 35m
2026-06-19 ITY610 - Jun 19, 13:44 UTCJun 19, 22:39 UTC8h 55m
2026-06-19 ITY6KC - Jun 19, 01:59 UTCJun 19, 09:49 UTC7h 50m
2026-06-18 ITY610 - Jun 18, 13:55 UTCJun 18, 22:35 UTC8h 40m
2026-06-17 ITY637 IAH → FCO Jun 17, 23:30 UTCJun 18, 09:50 UTC10h 20m
2026-06-17 ITY636 FCO → IAH Jun 17, 09:10 UTCJun 17, 20:40 UTC11h 30m
2026-06-16 ITY603 - Jun 16, 22:40 UTCJun 17, 06:10 UTC7h 30m
2026-06-16 ITY602 - Jun 16, 08:30 UTCJun 16, 17:30 UTC9h 0m
2026-06-15 ITY629 ORD → FCO Jun 15, 20:15 UTCJun 16, 04:55 UTC8h 40m
2026-06-15 ITY628 FCO → ORD Jun 15, 07:55 UTCJun 15, 17:45 UTC9h 50m

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.

Mode-S 4CA4B0 frequently asked

What is Mode-S code 4CA4B0?
4CA4B0 is an ICAO 24-bit transponder address. Allocated to Ireland.
Where is Mode-S 4CA4B0 registered?
Mode-S code 4CA4B0 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA4B0 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA4B0, octal 23122260, decimal 5,022,896.
What flights does 4CA4B0 operate?
Mode-S 4CA4B0 has broadcast 20 distinct callsigns, including ITY673, ITY672, ITY6KC, ITY650, ITY679.