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sensors Mode-S transponder

4CAD91

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-SCA · AIRBUS A-320neo

Hex
4CAD91
Octal
23126621
Decimal
5,025,169
Country
IE
Tail
EI-SCA
Type
A20N
Broadcasting now · callsign SAS7825 · 34,625 ft
Flights observed
283
Distinct callsigns
20
Country
IE
Last broadcast
6h ago

Current position

4CAD91 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CAD91 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
SAS1555 Scandinavian Airlines System 7 2026-05-27
SAS1556 Scandinavian Airlines System 6 2026-05-27
SAS51D Scandinavian Airlines System 5 2026-05-18
SAS31B Scandinavian Airlines System 5 2026-05-18
SAS89B - 4 2026-04-16
SAS72U Scandinavian Airlines System 4 2026-05-27
SAS45M Scandinavian Airlines System 4 2026-05-28
SAS41W Scandinavian Airlines System 4 2026-05-27
SAS41A Scandinavian Airlines System 4 2026-05-14
SAS36E Scandinavian Airlines System 4 2026-05-28
SAS187 Scandinavian Airlines System 4 2026-05-18
SAS793 Scandinavian Airlines System 3 2026-04-18
SAS74E Scandinavian Airlines System 3 2026-04-18
SAS68G Scandinavian Airlines System 3 2026-05-04
SAS609 - 3 2026-04-16
SAS59D Scandinavian Airlines System 3 2026-05-19
SAS58E Scandinavian Airlines System 3 2026-05-12
SAS54C Scandinavian Airlines System 3 2026-05-12
SAS169 Scandinavian Airlines System 3 2026-05-27
SAS106 Scandinavian Airlines System 3 2026-05-26

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SAS7656 CHQ → GOT May 29, 18:25 UTCMay 29, 22:10 UTC3h 45m
2026-05-29 SAS7655 GOT → CHQ May 29, 14:00 UTCMay 29, 17:10 UTC3h 10m
2026-05-29 SAS7884 ZTH → GOT May 29, 08:55 UTCMay 29, 12:05 UTC3h 10m
2026-05-29 SAS7883 GOT → ZTH May 29, 04:25 UTCMay 29, 07:15 UTC2h 50m
2026-05-28 SAS7960 - May 28, 19:10 UTCMay 28, 23:00 UTC3h 50m
2026-05-28 SAS7959 - May 28, 14:50 UTCMay 28, 17:55 UTC3h 5m
2026-05-28 SAS36E AGP → GOT May 28, 10:00 UTCMay 28, 13:25 UTC3h 25m
2026-05-28 SAS45M GOT → AGP May 28, 05:05 UTCMay 28, 08:40 UTC3h 35m
2026-05-27 SAS169 ARN → GOT May 27, 20:10 UTCMay 27, 20:55 UTC45m
2026-05-27 SAS1556 AMS → ARN May 27, 17:20 UTCMay 27, 19:05 UTC1h 45m
2026-05-27 SAS1555 ARN → AMS May 27, 14:30 UTCMay 27, 16:10 UTC1h 40m
2026-05-27 SAS41W PMI → ARN May 27, 09:45 UTCMay 27, 13:05 UTC3h 20m
2026-05-27 SAS72U ARN → PMI May 27, 05:19 UTCMay 27, 08:40 UTC3h 21m
2026-05-26 SAS79E BER → ARN May 26, 20:20 UTCMay 26, 21:40 UTC1h 20m
2026-05-26 SAS95W ARN → BER May 26, 18:10 UTCMay 26, 19:30 UTC1h 20m
2026-05-26 SAS488 OSL → ARN May 26, 16:15 UTCMay 26, 17:09 UTC55m
2026-05-26 SAS491 ARN → OSL May 26, 14:24 UTCMay 26, 15:14 UTC50m
2026-05-26 SAS68L KRN → ARN May 26, 12:00 UTCMay 26, 13:19 UTC1h 20m
2026-05-26 SAS50F ARN → KRN May 26, 09:49 UTCMay 26, 11:05 UTC1h 15m
2026-05-26 SAS106 MMX → ARN May 26, 08:10 UTCMay 26, 08:54 UTC45m
2026-05-26 SAS105 ARN → MMX May 26, 06:20 UTCMay 26, 07:15 UTC55m
2026-05-26 SAS130 MMX → ARN May 26, 04:00 UTCMay 26, 04:54 UTC55m
2026-05-25 SAS125 ARN → MMX May 25, 19:59 UTCMay 25, 20:50 UTC50m
2026-05-25 SAS150 GOT → ARN May 25, 05:20 UTCMay 25, 06:00 UTC40m
2026-05-24 SAS2051 LLA → GOT May 24, 19:40 UTCMay 24, 21:00 UTC1h 20m
2026-05-24 SAS2002 ARN → LLA May 24, 17:35 UTCMay 24, 18:35 UTC1h 0m
2026-05-24 SAS2003 LLA → ARN May 24, 15:30 UTCMay 24, 16:25 UTC55m
2026-05-24 SAS2050 LLA → GOT May 24, 13:05 UTCMay 24, 14:25 UTC1h 20m
2026-05-24 SAS7654 RHO → GOT May 24, 08:20 UTCMay 24, 11:55 UTC3h 35m
2026-05-24 SAS7653 GOT → RHO May 24, 03:20 UTCMay 24, 06:40 UTC3h 20m
2026-05-23 SAS7916 JSI → GOT May 23, 17:50 UTCMay 23, 20:05 UTC2h 15m
2026-05-23 SAS7915 GOT → JSI May 23, 14:40 UTCMay 23, 16:40 UTC2h 0m
2026-05-23 SAS7826 JTR → GOT May 23, 12:55 UTCMay 23, 13:35 UTC40m
2026-05-23 SAS7826 JTR → GOT May 23, 09:30 UTCMay 23, 12:50 UTC3h 20m
2026-05-23 SAS7825 GOT → JTR May 23, 04:15 UTCMay 23, 08:10 UTC3h 55m
2026-05-22 SAS7956 IOA → GOT May 22, 19:15 UTCMay 22, 22:05 UTC2h 50m
2026-05-22 SAS7923 - May 22, 15:00 UTCMay 22, 17:40 UTC2h 40m
2026-05-21 SAS96T AGP → ARN May 21, 18:40 UTCMay 21, 22:30 UTC3h 50m
2026-05-21 SAS95T ARN → AGP May 21, 13:15 UTCMay 21, 17:20 UTC4h 5m
2026-05-21 SAS59Z GOT → ARN May 21, 11:30 UTCMay 21, 12:10 UTC40m
2026-05-21 SAS157 ARN → GOT May 21, 10:05 UTCMay 21, 10:45 UTC40m
2026-05-21 SAS106 MMX → ARN May 21, 08:00 UTCMay 21, 08:55 UTC55m
2026-05-21 SAS105 ARN → MMX May 21, 06:15 UTCMay 21, 07:05 UTC50m
2026-05-21 SAS45A CPH → CDG May 21, 04:35 UTCMay 21, 05:15 UTC40m
2026-05-20 SAS026 ARN → UME May 20, 20:05 UTCMay 20, 20:40 UTC35m
2026-05-20 SAS1556 AMS → ARN May 20, 17:20 UTCMay 20, 18:55 UTC1h 35m
2026-05-20 SAS1555 ARN → AMS May 20, 14:25 UTCMay 20, 16:10 UTC1h 45m
2026-05-20 SAS41W PMI → ARN May 20, 10:00 UTCMay 20, 13:20 UTC3h 20m
2026-05-20 SAS72U ARN → PMI May 20, 05:30 UTCMay 20, 08:45 UTC3h 15m
2026-05-19 SAS1428 CPH → ARN May 19, 21:30 UTCMay 19, 22:20 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-SCA page for operator, model, and routing details .

Mode-S 4CAD91 frequently asked

What is Mode-S code 4CAD91?
4CAD91 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-SCA.
Where is Mode-S 4CAD91 registered?
Mode-S code 4CAD91 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAD91 broadcasting right now?
Yes. Mode-S 4CAD91 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAD91, octal 23126621, decimal 5,025,169.
What flights does 4CAD91 operate?
Mode-S 4CAD91 has broadcast 20 distinct callsigns, including SAS1555, SAS1556, SAS51D, SAS31B, SAS89B.