Apparatus

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sensors Mode-S transponder

4CADFA

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CADFA
Octal
23126772
Decimal
5,025,274
Country
IE
Tail
EI-HPA
Type
A339
Broadcasting now · callsign ITY673 · 41,000 ft
Flights observed
156
Distinct callsigns
20
Country
IE
Last broadcast
2h ago

Current position

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

Country allocation

The ICAO 24-bit address 4CADFA 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 - 11 2026-07-13
ITY608 ITA Airways 10 2026-06-08
ITY672 - 9 2026-07-12
ITY609 ITA Airways 8 2026-06-08
ITY675 - 7 2026-07-07
ITY674 - 7 2026-07-06
ITY770 - 6 2026-07-04
ITY769 - 6 2026-07-04
ITY682 ITA Airways 6 2026-04-15
ITY640 - 6 2026-07-02
ITY6MO ITA Airways 5 2026-06-02
ITY683 ITA Airways 5 2026-04-15
ITY650 - 5 2026-06-27
ITY641 - 5 2026-07-02
ITY630 ITA Airways 5 2026-06-01
ITY651 - 4 2026-06-27
ITY637 - 4 2026-07-08
ITY636 - 4 2026-07-08
ITY629 ITA Airways 4 2026-06-30
ITY628 ITA Airways 4 2026-06-30

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ITY673 - Jul 13, 17:40 UTCJul 13, 23:55 UTC6h 15m
2026-07-12 ITY672 - Jul 12, 20:50 UTCJul 13, 08:01 UTC11h 10m
2026-07-08 ITY637 - Jul 8, 23:30 UTCJul 9, 10:05 UTC10h 35m
2026-07-08 ITY636 - Jul 8, 09:00 UTCJul 8, 20:15 UTC11h 15m
2026-07-07 ITY675 - Jul 7, 17:35 UTCJul 8, 04:35 UTC11h 0m
2026-07-06 ITY674 - Jul 6, 21:30 UTCJul 7, 09:10 UTC11h 40m
2026-07-05 ITY673 GIG → FCO Jul 5, 22:45 UTCJul 6, 09:20 UTC10h 35m
2026-07-05 ITY672 - Jul 5, 09:00 UTCJul 5, 20:15 UTC11h 15m
2026-07-04 ITY769 DEL → FCO Jul 4, 22:05 UTCJul 5, 06:05 UTC8h 0m
2026-07-04 ITY770 - Jul 4, 13:00 UTCJul 4, 20:05 UTC7h 5m
2026-07-04 ITY6KC JFK → FCO Jul 4, 01:50 UTCJul 4, 09:20 UTC7h 30m
2026-07-03 ITY610 - Jul 3, 13:35 UTCJul 3, 22:30 UTC8h 55m
2026-07-02 ITY641 - Jul 2, 23:20 UTCJul 3, 10:20 UTC11h 0m
2026-07-02 ITY640 - Jul 2, 08:30 UTCJul 2, 20:45 UTC12h 15m
2026-07-01 ITY615 - Jul 1, 21:25 UTCJul 2, 05:10 UTC7h 45m
2026-07-01 ITY614 - Jul 1, 09:05 UTCJul 1, 17:40 UTC8h 35m
2026-06-30 ITY629 ORD → FCO Jun 30, 20:15 UTCJul 1, 05:00 UTC8h 45m
2026-06-30 ITY628 FCO → ORD Jun 30, 07:55 UTCJun 30, 17:40 UTC9h 45m
2026-06-28 ITY637 IAH → FCO Jun 28, 23:04 UTCJun 29, 09:25 UTC10h 20m
2026-06-28 ITY636 FCO → IAH Jun 28, 08:50 UTCJun 28, 19:55 UTC11h 5m
2026-06-27 ITY651 - Jun 27, 21:40 UTCJun 28, 05:40 UTC8h 0m
2026-06-27 ITY650 - Jun 27, 09:34 UTCJun 27, 18:20 UTC8h 45m
2026-06-26 ITY769 DEL → FCO Jun 26, 22:10 UTCJun 27, 06:15 UTC8h 5m
2026-06-26 ITY770 - Jun 26, 12:50 UTCJun 26, 19:55 UTC7h 5m
2026-06-25 ITY641 - Jun 25, 22:34 UTCJun 26, 10:05 UTC11h 30m
2026-06-25 ITY640 - Jun 25, 07:30 UTCJun 25, 19:39 UTC12h 10m
2026-06-24 ITY675 - Jun 24, 17:29 UTCJun 25, 04:29 UTC11h 0m
2026-06-23 ITY674 - Jun 23, 20:34 UTCJun 24, 07:44 UTC11h 10m
2026-06-22 ITY641 SFO → FCO Jun 22, 22:44 UTCJun 23, 10:15 UTC11h 30m
2026-06-22 ITY640 - Jun 22, 15:10 UTCJun 22, 19:54 UTC4h 45m
2026-06-22 ITY640 - Jun 22, 07:34 UTCJun 22, 13:19 UTC5h 45m
2026-06-21 ITY615 BOS → FCO Jun 21, 21:44 UTCJun 22, 05:10 UTC7h 25m
2026-06-21 ITY614 - Jun 21, 09:44 UTCJun 21, 18:04 UTC8h 20m
2026-06-19 ITY651 YYZ → FCO Jun 19, 21:14 UTCJun 20, 05:29 UTC8h 15m
2026-06-19 ITY650 - Jun 19, 16:25 UTCJun 19, 17:29 UTC1h 5m
2026-06-19 ITY650 - Jun 19, 08:44 UTCJun 19, 11:49 UTC3h 5m
2026-06-19 - - Jun 19, 06:10 UTCJun 19, 06:20 UTC10m
2026-06-18 ITY619 IAD → FCO Jun 18, 20:45 UTCJun 19, 05:00 UTC8h 14m
2026-06-18 ITY618 FCO → IAD Jun 18, 08:55 UTCJun 18, 18:05 UTC9h 10m
2026-06-17 ITY629 ORD → FCO Jun 17, 21:15 UTCJun 18, 06:10 UTC8h 55m
2026-06-17 ITY628 FCO → ORD Jun 17, 08:40 UTCJun 17, 18:45 UTC10h 5m
2026-06-16 ITY675 - Jun 16, 17:35 UTCJun 17, 04:15 UTC10h 41m
2026-06-16 ITY674 - Jun 16, 02:24 UTCJun 16, 13:55 UTC11h 30m
2026-06-15 ITY8010 CAG → AHO Jun 15, 14:40 UTCJun 15, 23:54 UTC9h 15m
2026-06-15 RYR25DD STN → EGC Jun 15, 10:40 UTCJun 15, 10:50 UTC10m
2026-06-13 ITY632 FCO → MIA Jun 13, 23:15 UTCJun 13, 23:55 UTC40m
2026-06-13 ITY632 FCO → MIA Jun 13, 13:35 UTCJun 13, 16:20 UTC2h 45m
2026-06-12 ITY641 SFO → FCO Jun 12, 22:55 UTCJun 13, 10:20 UTC11h 24m
2026-06-12 ITY640 FCO → SFO Jun 12, 07:45 UTCJun 12, 19:55 UTC12h 10m
2026-06-11 ITY675 GRU → FCO Jun 11, 17:20 UTCJun 12, 04:30 UTC11h 11m

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

Mode-S 4CADFA frequently asked

What is Mode-S code 4CADFA?
4CADFA is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HPA.
Where is Mode-S 4CADFA registered?
Mode-S code 4CADFA is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CADFA broadcasting right now?
Yes. Mode-S 4CADFA is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CADFA, octal 23126772, decimal 5,025,274.
What flights does 4CADFA operate?
Mode-S 4CADFA has broadcast 20 distinct callsigns, including ITY673, ITY608, ITY672, ITY609, ITY675.