Apparatus

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sensors Mode-S transponder

4CAFFB

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAFFB
Octal
23127773
Decimal
5,025,787
Country
IE
Tail
EI-TYC
Type
A339
Broadcasting now · callsign ITY679 · 39,000 ft
Flights observed
163
Distinct callsigns
20
Country
IE
Last broadcast
2h ago

Current position

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

Country allocation

The ICAO 24-bit address 4CAFFB 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
ITY610 ITA Airways 11 2026-06-12
ITY609 - 11 2026-07-10
ITY672 - 10 2026-06-18
ITY641 - 10 2026-06-26
ITY6KC - 9 2026-06-13
ITY608 - 9 2026-07-10
ITY769 - 7 2026-06-15
ITY770 - 6 2026-06-15
ITY673 ITA Airways 6 2026-06-19
ITY640 - 6 2026-06-26
ITY602 - 6 2026-07-11
ITY6MO - 5 2026-06-30
ITY679 - 5 2026-07-13
ITY678 - 5 2026-07-13
ITY630 ITA Airways 5 2026-06-30
ITY603 - 5 2026-07-11
ITY651 - 4 2026-07-12
ITY650 - 4 2026-07-12
ITY619 - 4 2026-06-21
ITY618 - 4 2026-06-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 ITY679 - Jul 13, 22:15 UTCJul 14, 04:45 UTC6h 30m
2026-07-13 ITY678 - Jul 13, 08:20 UTCJul 13, 19:55 UTC11h 35m
2026-07-12 ITY651 - Jul 12, 21:25 UTCJul 13, 05:40 UTC8h 15m
2026-07-12 ITY650 FCO → YYZ Jul 12, 10:01 UTCJul 12, 18:50 UTC8h 50m
2026-07-11 ITY603 JFK → FCO Jul 11, 22:55 UTCJul 12, 06:45 UTC7h 50m
2026-07-11 ITY602 - Jul 11, 08:55 UTCJul 11, 17:50 UTC8h 55m
2026-07-10 ITY609 JFK → FCO Jul 10, 20:55 UTCJul 11, 04:40 UTC7h 45m
2026-07-10 ITY608 - Jul 10, 08:45 UTCJul 10, 17:45 UTC9h 0m
2026-07-09 ITY603 JFK → FCO Jul 9, 21:50 UTCJul 10, 05:45 UTC7h 55m
2026-07-09 ITY602 - Jul 9, 08:15 UTCJul 9, 17:00 UTC8h 45m
2026-07-08 ITY651 YYZ → FCO Jul 8, 21:20 UTCJul 9, 05:40 UTC8h 20m
2026-07-08 ITY650 - Jul 8, 09:30 UTCJul 8, 18:10 UTC8h 40m
2026-07-07 ITY629 - Jul 7, 20:25 UTCJul 8, 05:35 UTC9h 10m
2026-07-07 ITY628 - Jul 7, 08:00 UTCJul 7, 17:30 UTC9h 30m
2026-07-06 ITY8009 - Jul 6, 17:10 UTCJul 6, 17:40 UTC30m
2026-07-02 ITY8013 - Jul 2, 14:20 UTCJul 2, 15:05 UTC45m
2026-06-30 ITY6MO - Jun 30, 23:55 UTCJul 1, 09:30 UTC9h 35m
2026-06-30 ITY630 FCO → MIA Jun 30, 09:20 UTCJun 30, 19:45 UTC10h 25m
2026-06-29 ITY629 ORD → FCO Jun 29, 20:30 UTCJun 30, 05:20 UTC8h 51m
2026-06-29 ITY628 FCO → ORD Jun 29, 08:09 UTCJun 29, 18:05 UTC9h 55m
2026-06-28 ITY633 MIA → FCO Jun 28, 03:14 UTCJun 28, 12:35 UTC9h 20m
2026-06-27 ITY632 FCO → MIA Jun 27, 13:30 UTCJun 27, 23:39 UTC10h 10m
2026-06-26 ITY641 - Jun 26, 22:40 UTCJun 27, 10:25 UTC11h 45m
2026-06-26 ITY640 - Jun 26, 07:35 UTCJun 26, 19:45 UTC12h 10m
2026-06-25 ITY615 BOS → FCO Jun 25, 21:20 UTCJun 26, 04:39 UTC7h 20m
2026-06-25 ITY614 - Jun 25, 08:55 UTCJun 25, 17:34 UTC8h 40m
2026-06-23 ITY621 - Jun 23, 22:25 UTCJun 24, 09:59 UTC11h 35m
2026-06-23 ITY620 - Jun 23, 07:40 UTCJun 23, 20:19 UTC12h 40m
2026-06-22 ITY609 - Jun 22, 20:39 UTCJun 23, 04:19 UTC7h 40m
2026-06-22 ITY608 - Jun 22, 08:35 UTCJun 22, 17:20 UTC8h 45m
2026-06-21 ITY619 IAD → FCO Jun 21, 20:54 UTCJun 22, 05:04 UTC8h 10m
2026-06-21 ITY618 - Jun 21, 09:10 UTCJun 21, 18:25 UTC9h 15m
2026-06-20 ITY629 ORD → FCO Jun 20, 20:20 UTCJun 21, 05:15 UTC8h 55m
2026-06-20 ITY628 FCO → ORD Jun 20, 07:54 UTCJun 20, 17:44 UTC9h 50m
2026-06-19 ITY673 GIG → FCO Jun 19, 17:44 UTCJun 20, 04:24 UTC10h 40m
2026-06-18 ITY672 - Jun 18, 20:50 UTCJun 19, 07:59 UTC11h 9m
2026-06-17 ITY641 - Jun 17, 23:10 UTCJun 18, 10:50 UTC11h 40m
2026-06-17 ITY640 - Jun 17, 08:20 UTCJun 17, 20:35 UTC12h 15m
2026-06-16 ITY609 - Jun 16, 21:00 UTCJun 17, 04:30 UTC7h 30m
2026-06-16 ITY608 - Jun 16, 08:55 UTCJun 16, 17:49 UTC8h 55m
2026-06-15 ITY769 DEL → FCO Jun 15, 22:00 UTCJun 16, 05:59 UTC8h 0m
2026-06-15 ITY770 - Jun 15, 12:39 UTCJun 15, 19:35 UTC6h 55m
2026-06-14 ITY637 IAH → FCO Jun 14, 23:20 UTCJun 15, 09:40 UTC10h 20m
2026-06-14 ITY636 FCO → IAH Jun 14, 08:50 UTCJun 14, 20:20 UTC11h 30m
2026-06-13 ITY6KC JFK → FCO Jun 13, 02:05 UTCJun 13, 09:50 UTC7h 44m
2026-06-12 ITY610 FCO → JFK Jun 12, 13:40 UTCJun 12, 22:20 UTC8h 40m
2026-06-11 ITY641 - Jun 11, 22:40 UTCJun 12, 10:00 UTC11h 21m
2026-06-11 ITY640 FCO → SFO Jun 11, 07:35 UTCJun 11, 20:05 UTC12h 30m
2026-06-10 ITY609 JFK → FCO Jun 10, 20:50 UTCJun 11, 04:35 UTC7h 45m
2026-06-10 ITY608 FCO → JFK Jun 10, 08:40 UTCJun 10, 17:35 UTC8h 55m

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

Mode-S 4CAFFB frequently asked

What is Mode-S code 4CAFFB?
4CAFFB is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-TYC.
Where is Mode-S 4CAFFB registered?
Mode-S code 4CAFFB is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAFFB broadcasting right now?
Yes. Mode-S 4CAFFB is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAFFB, octal 23127773, decimal 5,025,787.
What flights does 4CAFFB operate?
Mode-S 4CAFFB has broadcast 20 distinct callsigns, including ITY610, ITY609, ITY672, ITY641, ITY6KC.