Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

4CAC65

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-AZD · BOEING 737-800

Hex
4CAC65
Octal
23126145
Decimal
5,024,869
Country
IE
Tail
EI-AZD
Type
B738
No current signal · last broadcast 3h ago
Flights observed
82
Distinct callsigns
11
Country
IE
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 4CAC65.

Country allocation

The ICAO 24-bit address 4CAC65 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 11 distinct

Callsign Airline Flights Last seen
BCS95W European Air Transport 27 2026-05-29
BCS21Q European Air Transport 24 2026-05-29
BCS32B European Air Transport 23 2026-05-28
BCS843 European Air Transport 1 2026-05-08
BCS757 European Air Transport 1 2026-05-25
BCS5917 European Air Transport 1 2026-04-24
BCS5916 European Air Transport 1 2026-04-24
BCS2960 European Air Transport 1 2026-05-08
BCS1TQ European Air Transport 1 2026-05-08
BCS129 - 1 2026-04-30
ABR779 - 1 2026-04-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 BCS21Q CDG → BOD May 29, 19:45 UTCMay 29, 21:40 UTC1h 55m
2026-05-29 BCS95W LEJ → BRU May 29, 03:55 UTCMay 29, 05:10 UTC1h 15m
2026-05-28 BCS21Q CDG → BOD May 28, 21:55 UTCMay 28, 22:30 UTC35m
2026-05-28 BCS32B BOD → BOD May 28, 19:30 UTCMay 28, 20:20 UTC50m
2026-05-28 BCS95W LEJ → BRU May 28, 03:55 UTCMay 28, 05:10 UTC1h 15m
2026-05-27 BCS21Q CDG → BOD May 27, 22:15 UTCMay 27, 22:45 UTC30m
2026-05-27 BCS32B BOD → BOD May 27, 19:55 UTCMay 27, 20:45 UTC50m
2026-05-27 BCS95W LEJ → BRU May 27, 03:59 UTCMay 27, 05:09 UTC1h 10m
2026-05-26 BCS32B BOD → BOD May 26, 19:55 UTCMay 26, 21:04 UTC1h 10m
2026-05-26 BCS95W LEJ → BRU May 26, 03:55 UTCMay 26, 05:10 UTC1h 15m
2026-05-25 BCS757 FRA → LHR May 25, 03:55 UTCMay 25, 05:15 UTC1h 20m
2026-05-25 BCS95W LEJ → BRU May 25, 01:55 UTCMay 25, 02:20 UTC25m
2026-05-22 BCS21Q CDG → BOD May 22, 19:35 UTCMay 22, 21:15 UTC1h 40m
2026-05-22 BCS95W LEJ → BRU May 22, 04:05 UTCMay 22, 05:20 UTC1h 15m
2026-05-21 BCS21Q CDG → BOD May 21, 22:10 UTCMay 21, 22:45 UTC35m
2026-05-21 BCS32B BOD → BOD May 21, 19:10 UTCMay 21, 20:05 UTC55m
2026-05-21 BCS95W LEJ → BRU May 21, 04:00 UTCMay 21, 05:15 UTC1h 15m
2026-05-20 BCS21Q CDG → BOD May 20, 22:00 UTCMay 20, 22:40 UTC40m
2026-05-20 BCS32B BOD → BOD May 20, 19:10 UTCMay 20, 20:10 UTC1h 0m
2026-05-20 BCS95W LEJ → BRU May 20, 04:00 UTCMay 20, 05:10 UTC1h 11m
2026-05-19 BCS21Q CDG → BOD May 19, 22:05 UTCMay 19, 22:45 UTC40m
2026-05-19 BCS32B BOD → BOD May 19, 19:20 UTCMay 19, 20:20 UTC1h 0m
2026-05-19 BCS95W LEJ → BRU May 19, 04:00 UTCMay 19, 05:15 UTC1h 15m
2026-05-18 BCS21Q CDG → BOD May 18, 22:55 UTCMay 18, 23:35 UTC40m
2026-05-18 BCS32B BOD → BOD May 18, 20:30 UTCMay 18, 21:30 UTC1h 0m
2026-05-18 BCS95W LEJ → BRU May 18, 00:15 UTCMay 18, 02:00 UTC1h 45m
2026-05-15 BCS21Q CDG → BOD May 15, 19:40 UTCMay 15, 21:30 UTC1h 50m
2026-05-15 BCS95W LEJ → BRU May 15, 04:05 UTCMay 15, 05:10 UTC1h 5m
2026-05-13 BCS21Q CDG → BOD May 13, 22:00 UTCMay 13, 22:40 UTC40m
2026-05-13 BCS32B BOD → BOD May 13, 19:15 UTCMay 13, 20:10 UTC55m
2026-05-13 BCS95W LEJ → BRU May 13, 03:55 UTCMay 13, 05:10 UTC1h 15m
2026-05-12 BCS21Q CDG → BOD May 12, 22:10 UTCMay 12, 22:45 UTC35m
2026-05-12 BCS32B BOD → BOD May 12, 19:15 UTCMay 12, 20:15 UTC1h 0m
2026-05-12 BCS95W LEJ → BRU May 12, 04:00 UTCMay 12, 05:10 UTC1h 10m
2026-05-11 BCS21Q CDG → BOD May 11, 22:10 UTCMay 11, 22:35 UTC24m
2026-05-11 BCS32B BOD → BOD May 11, 19:15 UTCMay 11, 20:20 UTC1h 5m
2026-05-11 BCS95W LEJ → BRU May 11, 00:19 UTCMay 11, 02:10 UTC1h 50m
2026-05-08 BCS1TQ SNN → LEJ May 8, 19:00 UTCMay 8, 20:55 UTC1h 55m
2026-05-08 BCS2960 LEJ → SNN May 8, 03:04 UTCMay 8, 05:09 UTC2h 5m
2026-05-08 BCS843 EMA → CGN May 8, 00:09 UTCMay 8, 01:00 UTC50m
2026-05-07 BCS21Q CDG → BOD May 7, 22:05 UTCMay 7, 22:45 UTC40m
2026-05-07 BCS32B BOD → BOD May 7, 20:00 UTCMay 7, 20:50 UTC50m
2026-05-07 BCS95W LEJ → BRU May 7, 04:00 UTCMay 7, 05:15 UTC1h 15m
2026-05-06 BCS21Q CDG → BOD May 6, 22:05 UTCMay 6, 22:45 UTC40m
2026-05-06 BCS32B BOD → BOD May 6, 19:25 UTCMay 6, 20:20 UTC55m
2026-05-06 BCS95W LEJ → BRU May 6, 04:15 UTCMay 6, 05:25 UTC1h 10m
2026-05-05 BCS21Q CDG → BOD May 5, 22:01 UTCMay 5, 22:30 UTC30m
2026-05-05 BCS32B BOD → BOD May 5, 19:15 UTCMay 5, 20:15 UTC1h 0m
2026-05-05 BCS95W LEJ → BRU May 5, 04:00 UTCMay 5, 05:15 UTC1h 15m
2026-05-04 BCS21Q CDG → BOD May 4, 22:00 UTCMay 4, 22:35 UTC35m

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

Mode-S 4CAC65 frequently asked

What is Mode-S code 4CAC65?
4CAC65 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-AZD.
Where is Mode-S 4CAC65 registered?
Mode-S code 4CAC65 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAC65 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAC65, octal 23126145, decimal 5,024,869.
What flights does 4CAC65 operate?
Mode-S 4CAC65 has broadcast 11 distinct callsigns, including BCS95W, BCS21Q, BCS32B, BCS843, BCS757.