Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4CADC9

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HJR · AIRBUS A-330-900

Hex
4CADC9
Octal
23126711
Decimal
5,025,225
Country
IE
Tail
EI-HJR
Type
A339
No current signal · last broadcast 2h ago
Flights observed
178
Distinct callsigns
20
Country
IE
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 4CADC9.

Country allocation

The ICAO 24-bit address 4CADC9 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
ITY608 - 14 2026-07-06
ITY620 ITA Airways 13 2026-06-02
ITY621 ITA Airways 12 2026-06-02
ITY615 - 12 2026-07-12
ITY609 - 12 2026-07-06
ITY614 - 11 2026-07-12
ITY603 - 11 2026-07-05
ITY602 - 11 2026-07-05
ITY759 ITA Airways 7 2026-04-13
ITY675 - 6 2026-07-09
ITY674 - 6 2026-07-08
ITY769 - 5 2026-06-12
ITY6MO - 5 2026-07-11
ITY630 - 5 2026-07-11
ITY770 - 4 2026-06-12
ITY651 - 4 2026-06-23
ITY650 - 4 2026-06-23
ITY6KC - 3 2026-06-26
ITY682 - 3 2026-07-14
ITY673 ITA Airways 3 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 ITY682 - Jul 14, 13:25 UTCJul 14, 18:55 UTC5h 30m
2026-07-14 ITY637 - Jul 14, 00:15 UTCJul 14, 10:40 UTC10h 25m
2026-07-13 ITY636 - Jul 13, 10:00 UTCJul 13, 21:35 UTC11h 35m
2026-07-12 ITY615 - Jul 12, 23:00 UTCJul 13, 06:30 UTC7h 30m
2026-07-12 ITY614 - Jul 12, 12:01 UTCJul 12, 20:20 UTC8h 20m
2026-07-11 ITY6MO - Jul 11, 22:20 UTCJul 12, 08:10 UTC9h 50m
2026-07-11 ITY630 - Jul 11, 09:30 UTCJul 11, 19:30 UTC10h 0m
2026-07-10 ITY6MO - Jul 10, 21:10 UTCJul 11, 06:50 UTC9h 40m
2026-07-10 ITY630 - Jul 10, 08:15 UTCJul 10, 18:40 UTC10h 25m
2026-07-09 ITY675 - Jul 9, 17:35 UTCJul 10, 04:25 UTC10h 50m
2026-07-08 ITY674 - Jul 8, 20:45 UTCJul 9, 08:10 UTC11h 25m
2026-07-08 ITY641 - Jul 8, 00:35 UTCJul 8, 11:45 UTC11h 10m
2026-07-07 ITY640 - Jul 7, 09:10 UTCJul 7, 21:55 UTC12h 45m
2026-07-06 ITY609 JFK → FCO Jul 6, 20:55 UTCJul 7, 04:35 UTC7h 40m
2026-07-06 ITY608 - Jul 6, 09:20 UTCJul 6, 18:10 UTC8h 50m
2026-07-05 ITY603 JFK → FCO Jul 5, 22:35 UTCJul 6, 06:00 UTC7h 25m
2026-07-05 ITY602 - Jul 5, 08:25 UTCJul 5, 17:20 UTC8h 55m
2026-07-03 ITY6MO - Jul 3, 00:35 UTCJul 3, 10:10 UTC9h 35m
2026-07-02 ITY630 FCO → MIA Jul 2, 10:10 UTCJul 2, 20:10 UTC10h 0m
2026-07-01 ITY603 JFK → FCO Jul 1, 22:40 UTCJul 2, 06:45 UTC8h 5m
2026-07-01 ITY602 - Jul 1, 08:15 UTCJul 1, 17:10 UTC8h 55m
2026-06-30 ITY615 BOS → FCO Jun 30, 22:10 UTCJul 1, 05:30 UTC7h 20m
2026-06-30 ITY614 - Jun 30, 10:40 UTCJun 30, 19:15 UTC8h 35m
2026-06-29 ITY603 JFK → FCO Jun 29, 23:19 UTCJun 30, 06:50 UTC7h 31m
2026-06-29 ITY602 - Jun 29, 08:24 UTCJun 29, 17:10 UTC8h 45m
2026-06-28 ITY675 - Jun 28, 17:34 UTCJun 29, 04:25 UTC10h 50m
2026-06-27 ITY674 - Jun 27, 21:25 UTCJun 28, 09:45 UTC12h 20m
2026-06-27 ITY683 - Jun 27, 04:49 UTCJun 27, 17:34 UTC12h 45m
2026-06-26 ITY682 - Jun 26, 12:55 UTCJun 27, 02:14 UTC13h 20m
2026-06-26 ITY6KC - Jun 26, 02:14 UTCJun 26, 09:55 UTC7h 40m
2026-06-25 ITY610 - Jun 25, 13:59 UTCJun 25, 22:49 UTC8h 50m
2026-06-24 ITY637 IAH → FCO Jun 24, 23:45 UTCJun 25, 09:59 UTC10h 15m
2026-06-24 ITY636 FCO → IAH Jun 24, 09:24 UTCJun 24, 20:49 UTC11h 25m
2026-06-23 ITY651 YYZ → FCO Jun 23, 22:34 UTCJun 24, 06:20 UTC7h 45m
2026-06-23 ITY650 - Jun 23, 10:55 UTCJun 23, 19:50 UTC8h 55m
2026-06-22 ITY603 JFK → FCO Jun 22, 21:59 UTCJun 23, 05:49 UTC7h 50m
2026-06-22 ITY602 - Jun 22, 08:19 UTCJun 22, 17:10 UTC8h 50m
2026-06-21 ITY675 - Jun 21, 17:45 UTCJun 22, 04:59 UTC11h 15m
2026-06-20 ITY674 - Jun 20, 21:34 UTCJun 21, 08:40 UTC11h 5m
2026-06-20 ITY6MO - Jun 20, 00:24 UTCJun 20, 09:54 UTC9h 30m
2026-06-19 ITY630 FCO → MIA Jun 19, 09:59 UTCJun 19, 20:24 UTC10h 25m
2026-06-18 ITY629 ORD → FCO Jun 18, 21:00 UTCJun 19, 05:54 UTC8h 54m
2026-06-18 ITY628 FCO → ORD Jun 18, 08:35 UTCJun 18, 18:15 UTC9h 40m
2026-06-15 ITY637 IAH → FCO Jun 15, 23:45 UTCJun 16, 09:40 UTC9h 55m
2026-06-15 ITY636 FCO → IAH Jun 15, 09:15 UTCJun 15, 21:09 UTC11h 55m
2026-06-14 ITY615 BOS → FCO Jun 14, 21:20 UTCJun 15, 04:34 UTC7h 15m
2026-06-14 ITY614 FCO → BOS Jun 14, 09:05 UTCJun 14, 17:20 UTC8h 15m
2026-06-13 ITY615 BOS → FCO Jun 13, 22:35 UTCJun 14, 06:05 UTC7h 30m
2026-06-13 ITY614 FCO → BOS Jun 13, 10:40 UTCJun 13, 19:10 UTC8h 30m
2026-06-12 ITY769 DEL → FCO Jun 12, 22:55 UTCJun 13, 06:45 UTC7h 49m

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

Mode-S 4CADC9 frequently asked

What is Mode-S code 4CADC9?
4CADC9 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HJR.
Where is Mode-S 4CADC9 registered?
Mode-S code 4CADC9 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CADC9 broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CADC9, octal 23126711, decimal 5,025,225.
What flights does 4CADC9 operate?
Mode-S 4CADC9 has broadcast 20 distinct callsigns, including ITY608, ITY620, ITY621, ITY615, ITY609.