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sensors Mode-S transponder

4CA9BD

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-IMS · AIRBUS A-319

Hex
4CA9BD
Octal
23124675
Decimal
5,024,189
Country
IE
Tail
EI-IMS
Type
A319
No current signal · last broadcast Jul 26, 21:15 UTC
Flights observed
348
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:15 UTC

Last known position

Most recent position reported by Mode-S 4CA9BD.

Country allocation

The ICAO 24-bit address 4CA9BD 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
ITY1681 ITA Airways 15 2026-07-25
ITY1676 ITA Airways 14 2026-07-26
ITY1682 ITA Airways 8 2026-07-10
ITY1677 - 8 2026-07-10
ITY1675 - 7 2026-07-10
ITY1179 - 7 2026-07-20
ITY1174 - 7 2026-07-20
ITY3OL ITA Airways 6 2026-07-20
ITY356 - 6 2026-07-19
ITY1684 - 6 2026-07-23
ITY1679 - 6 2026-07-23
ITY1678 - 6 2026-07-10
ITY1198 ITA Airways 6 2026-07-24
ITY1197 - 6 2026-07-24
ITY2016 - 4 2026-07-11
ITY1650 - 4 2026-07-16
ITY1639 - 4 2026-07-16
ITY1176 - 4 2026-07-15
ITY885 ITA Airways 3 2026-06-26
ITY884 ITA Airways 3 2026-06-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ITY4LI LIN → CTA Jul 26, 20:50 UTCJul 26, 21:15 UTC25m
2026-07-26 ITY353 ORY → LIN Jul 26, 18:35 UTCJul 26, 19:35 UTC1h 0m
2026-07-26 ITY3LO LIN → ORY Jul 26, 16:20 UTCJul 26, 17:20 UTC1h 0m
2026-07-26 ITY2038 FCO → LIN Jul 26, 14:10 UTCJul 26, 14:55 UTC45m
2026-07-26 ITY801 ALG → FCO Jul 26, 11:05 UTCJul 26, 12:10 UTC1h 5m
2026-07-26 ITY800 FCO → ALG Jul 26, 08:05 UTCJul 26, 09:20 UTC1h 15m
2026-07-26 ITY1676 FLR → FCO Jul 26, 04:40 UTCJul 26, 05:10 UTC30m
2026-07-25 ITY1681 FCO → FLR Jul 25, 21:15 UTCJul 25, 21:40 UTC25m
2026-07-25 ITY1178 SUF → FCO Jul 25, 14:40 UTCJul 25, 15:35 UTC55m
2026-07-25 ITY1171 FCO → SUF Jul 25, 12:35 UTCJul 25, 13:20 UTC45m
2026-07-25 ITY1412 TRN → FCO Jul 25, 09:50 UTCJul 25, 10:35 UTC45m
2026-07-25 ITY1421 FCO → TRN Jul 25, 07:35 UTCJul 25, 08:40 UTC1h 5m
2026-07-25 ITY1676 FLR → FCO Jul 25, 04:35 UTCJul 25, 05:05 UTC30m
2026-07-24 ITY1681 FCO → FLR Jul 24, 20:20 UTCJul 24, 20:50 UTC30m
2026-07-24 ITY2109 LIN → FCO Jul 24, 17:50 UTCJul 24, 18:35 UTC45m
2026-07-24 ITY1198 REG → LIN Jul 24, 15:15 UTCJul 24, 16:45 UTC1h 30m
2026-07-24 ITY1197 LIN → REG Jul 24, 12:55 UTCJul 24, 14:20 UTC1h 25m
2026-07-24 ITY351 ORY → LIN Jul 24, 09:05 UTCJul 24, 10:25 UTC1h 20m
2026-07-24 ITY350 LIN → ORY Jul 24, 06:35 UTCJul 24, 07:40 UTC1h 5m
2026-07-24 ITY2014 FCO → LIN Jul 24, 04:45 UTCJul 24, 05:35 UTC50m
2026-07-23 ITY1684 - Jul 23, 18:05 UTCJul 23, 18:30 UTC25m
2026-07-23 ITY1679 - Jul 23, 16:30 UTCJul 23, 17:05 UTC35m
2026-07-23 ITY1318 BLQ → FCO Jul 23, 14:25 UTCJul 23, 15:00 UTC35m
2026-07-23 ITY1319 FCO → BLQ Jul 23, 12:50 UTCJul 23, 13:25 UTC35m
2026-07-23 ITY863 TUN → FCO Jul 23, 10:15 UTCJul 23, 11:15 UTC1h 0m
2026-07-23 ITY864 FCO → TUN Jul 23, 08:10 UTCJul 23, 08:55 UTC45m
2026-07-23 ITY1154 REG → FCO Jul 23, 04:25 UTCJul 23, 05:25 UTC1h 0m
2026-07-22 ITY1161 FCO → REG Jul 22, 20:05 UTCJul 22, 20:50 UTC45m
2026-07-22 ITY727 - Jul 22, 12:10 UTCJul 22, 14:25 UTC2h 15m
2026-07-22 ITY726 - Jul 22, 10:20 UTCJul 22, 11:25 UTC1h 5m
2026-07-21 ITY1198 REG → LIN Jul 21, 19:05 UTCJul 21, 20:30 UTC1h 25m
2026-07-21 ITY1197 LIN → REG Jul 21, 17:00 UTCJul 21, 18:15 UTC1h 15m
2026-07-21 ITY051 LIN → PMI Jul 21, 14:35 UTCJul 21, 15:45 UTC1h 10m
2026-07-21 ITY050 PMI → LIN Jul 21, 11:55 UTCJul 21, 13:25 UTC1h 30m
2026-07-21 ITY1642 BDS → LIN Jul 21, 06:50 UTCJul 21, 08:15 UTC1h 25m
2026-07-21 ITY1629 LIN → BDS Jul 21, 04:40 UTCJul 21, 05:50 UTC1h 10m
2026-07-20 ITY2130 FCO → LIN Jul 20, 21:20 UTCJul 20, 22:05 UTC45m
2026-07-20 ITY745 - Jul 20, 19:00 UTCJul 20, 20:00 UTC1h 0m
2026-07-20 ITY744 - Jul 20, 15:30 UTCJul 20, 16:25 UTC55m
2026-07-20 ITY2071 - Jul 20, 13:30 UTCJul 20, 14:15 UTC45m
2026-07-20 ITY1174 - Jul 20, 10:35 UTCJul 20, 12:05 UTC1h 30m
2026-07-20 ITY1179 - Jul 20, 08:20 UTCJul 20, 09:30 UTC1h 10m
2026-07-20 ITY3OL ORY → LIN Jul 20, 05:40 UTCJul 20, 06:40 UTC1h 0m
2026-07-19 ITY356 LIN → ORY Jul 19, 18:40 UTCJul 19, 19:45 UTC1h 5m
2026-07-19 ITY723 CFU → LIN Jul 19, 16:00 UTCJul 19, 17:25 UTC1h 25m
2026-07-19 ITY724 - Jul 19, 13:05 UTCJul 19, 14:25 UTC1h 20m
2026-07-19 ITY1847 PNL → LIN Jul 19, 08:30 UTCJul 19, 10:00 UTC1h 30m
2026-07-19 ITY1844 LIN → PNL Jul 19, 06:10 UTCJul 19, 07:30 UTC1h 20m
2026-07-18 ITY1298 - Jul 18, 20:15 UTCJul 18, 21:15 UTC1h 0m
2026-07-18 ITY1291 - Jul 18, 18:10 UTCJul 18, 19:00 UTC50m

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

Mode-S 4CA9BD frequently asked

What is Mode-S code 4CA9BD?
4CA9BD is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-IMS.
Where is Mode-S 4CA9BD registered?
Mode-S code 4CA9BD is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA9BD broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA9BD, octal 23124675, decimal 5,024,189.
What flights does 4CA9BD operate?
Mode-S 4CA9BD has broadcast 20 distinct callsigns, including ITY1681, ITY1676, ITY1682, ITY1677, ITY1675.