Apparatus

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sensors Mode-S transponder

4CACBD

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-GEH · BOMBARDIER Regional Jet CRJ-900

Hex
4CACBD
Octal
23126275
Decimal
5,024,957
Country
IE
Tail
EI-GEH
Type
CRJ9
No current signal · last broadcast 4h ago
Flights observed
224
Distinct callsigns
20
Country
IE
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 4CACBD.

Country allocation

The ICAO 24-bit address 4CACBD 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
SAS662 Scandinavian Airlines System 8 2026-05-29
SAS661 Scandinavian Airlines System 8 2026-05-29
SAS87R Scandinavian Airlines System 6 2026-05-28
SAS34J Scandinavian Airlines System 6 2026-05-28
SAS2535 Scandinavian Airlines System 6 2026-05-18
SAS743 Scandinavian Airlines System 5 2026-05-24
SAS647 Scandinavian Airlines System 5 2026-05-29
SAS2536 - 5 2026-05-18
SAS84P - 4 2026-05-17
SAS742 Scandinavian Airlines System 4 2026-05-23
SAS658 Scandinavian Airlines System 4 2026-05-28
SAS657 Scandinavian Airlines System 4 2026-05-28
SAS649 Scandinavian Airlines System 4 2026-05-22
SAS648 Scandinavian Airlines System 4 2026-05-27
SAS2988 Scandinavian Airlines System 4 2026-05-25
SAS2983 Scandinavian Airlines System 4 2026-05-26
SAS21M Scandinavian Airlines System 4 2026-05-27
SAS1798 Scandinavian Airlines System 4 2026-05-25
SAS1797 Scandinavian Airlines System 4 2026-05-25
SAS1641 Scandinavian Airlines System 4 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SAS647 CPH → HAM May 29, 20:00 UTCMay 29, 20:35 UTC35m
2026-05-29 SAS2752 WAW → CPH May 29, 17:55 UTCMay 29, 19:05 UTC1h 10m
2026-05-29 SAS2751 CPH → WAW May 29, 16:10 UTCMay 29, 17:15 UTC1h 5m
2026-05-29 SAS668 STR → CPH May 29, 13:50 UTCMay 29, 15:15 UTC1h 25m
2026-05-29 SAS86P - May 29, 11:25 UTCMay 29, 12:35 UTC1h 10m
2026-05-29 SAS662 MUC → CPH May 29, 08:25 UTCMay 29, 09:45 UTC1h 20m
2026-05-29 SAS661 CPH → MUC May 29, 06:20 UTCMay 29, 07:35 UTC1h 15m
2026-05-28 SAS87R VNO → CPH May 28, 14:00 UTCMay 28, 15:20 UTC1h 20m
2026-05-28 SAS34J CPH → VNO May 28, 11:30 UTCMay 28, 13:15 UTC1h 45m
2026-05-28 SAS658 STR → CPH May 28, 08:15 UTCMay 28, 09:25 UTC1h 10m
2026-05-28 SAS657 CPH → STR May 28, 06:15 UTCMay 28, 07:20 UTC1h 5m
2026-05-27 SAS696 CPH → VIE May 27, 18:00 UTCMay 27, 19:30 UTC1h 30m
2026-05-27 SAS695 VIE → CPH May 27, 16:00 UTCMay 27, 17:10 UTC1h 10m
2026-05-27 SAS87R VNO → CPH May 27, 13:05 UTCMay 27, 14:30 UTC1h 25m
2026-05-27 SAS34J CPH → VNO May 27, 11:05 UTCMay 27, 12:10 UTC1h 5m
2026-05-27 SAS21M HAM → CPH May 27, 07:50 UTCMay 27, 08:20 UTC30m
2026-05-27 SAS1641 CPH → HAM May 27, 06:29 UTCMay 27, 07:05 UTC36m
2026-05-27 SAS648 HAM → CPH May 27, 04:19 UTCMay 27, 04:49 UTC30m
2026-05-26 SAS647 CPH → HAM May 26, 19:55 UTCMay 26, 20:24 UTC30m
2026-05-26 SAS766 CPH → WRO May 26, 17:35 UTCMay 26, 18:34 UTC1h 0m
2026-05-26 SAS765 WRO → CPH May 26, 16:00 UTCMay 26, 16:55 UTC55m
2026-05-26 SAS1622 DUS → CPH May 26, 14:00 UTCMay 26, 15:05 UTC1h 5m
2026-05-26 SAS1621 CPH → DUS May 26, 11:44 UTCMay 26, 12:45 UTC1h 0m
2026-05-26 SAS662 MUC → CPH May 26, 08:30 UTCMay 26, 09:55 UTC1h 25m
2026-05-26 SAS661 CPH → MUC May 26, 06:10 UTCMay 26, 07:29 UTC1h 20m
2026-05-26 SAS2983 CPH → KRS May 26, 04:04 UTCMay 26, 04:45 UTC40m
2026-05-25 SAS2988 CPH → KRS May 25, 20:59 UTCMay 25, 21:49 UTC50m
2026-05-25 SAS2711 TKU → CPH May 25, 12:55 UTCMay 25, 14:05 UTC1h 10m
2026-05-25 SAS2710 CPH → TKU May 25, 10:55 UTCMay 25, 12:00 UTC1h 5m
2026-05-25 SAS1797 TLL → CPH May 25, 08:30 UTCMay 25, 10:00 UTC1h 30m
2026-05-25 SAS1798 CPH → TLL May 25, 06:25 UTCMay 25, 07:40 UTC1h 15m
2026-05-25 SAS1240 AAR → CPH May 25, 04:25 UTCMay 25, 05:00 UTC35m
2026-05-24 SAS94J FRA → CPH May 24, 18:45 UTCMay 24, 19:45 UTC1h 0m
2026-05-24 SAS1635 CPH → FRA May 24, 16:25 UTCMay 24, 17:25 UTC1h 0m
2026-05-24 SAS2873 BGO → CPH May 24, 14:20 UTCMay 24, 15:15 UTC55m
2026-05-24 SAS2868 CPH → BGO May 24, 12:25 UTCMay 24, 13:35 UTC1h 10m
2026-05-24 SAS662 MUC → CPH May 24, 08:40 UTCMay 24, 09:50 UTC1h 10m
2026-05-24 SAS661 CPH → MUC May 24, 06:05 UTCMay 24, 07:20 UTC1h 15m
2026-05-24 SAS743 VNO → CPH May 24, 03:15 UTCMay 24, 04:40 UTC1h 25m
2026-05-23 SAS742 CPH → VNO May 23, 21:05 UTCMay 23, 22:10 UTC1h 5m
2026-05-23 SAS2883 TRD → CPH May 23, 17:45 UTCMay 23, 19:00 UTC1h 16m
2026-05-23 SAS2886 CPH → TRD May 23, 15:45 UTCMay 23, 17:05 UTC1h 20m
2026-05-23 SAS87R VNO → CPH May 23, 13:00 UTCMay 23, 14:25 UTC1h 25m
2026-05-23 SAS34J CPH → VNO May 23, 11:00 UTCMay 23, 12:10 UTC1h 10m
2026-05-23 SAS658 STR → CPH May 23, 08:15 UTCMay 23, 09:30 UTC1h 15m
2026-05-23 SAS657 CPH → STR May 23, 06:10 UTCMay 23, 07:20 UTC1h 10m
2026-05-22 SAS762 BUD → CPH May 22, 17:50 UTCMay 22, 19:25 UTC1h 35m
2026-05-22 SAS55N CPH → BUD May 22, 15:35 UTCMay 22, 17:00 UTC1h 25m
2026-05-22 SAS51R HAM → CPH May 22, 13:45 UTCMay 22, 14:25 UTC40m
2026-05-22 SAS649 CPH → HAM May 22, 12:25 UTCMay 22, 12:55 UTC30m

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

Mode-S 4CACBD frequently asked

What is Mode-S code 4CACBD?
4CACBD is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-GEH.
Where is Mode-S 4CACBD registered?
Mode-S code 4CACBD is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CACBD broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CACBD, octal 23126275, decimal 5,024,957.
What flights does 4CACBD operate?
Mode-S 4CACBD has broadcast 20 distinct callsigns, including SAS662, SAS661, SAS87R, SAS34J, SAS2535.