Apparatus

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sensors Mode-S transponder

4CAC7A

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAC7A
Octal
23126172
Decimal
5,024,890
Country
IE
Tail
EI-SIK
Type
A20N
Transponder active on ground
Flights observed
272
Distinct callsigns
20
Country
IE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4CAC7A.

Country allocation

The ICAO 24-bit address 4CAC7A 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
SAS71K Scandinavian Airlines System 6 2026-05-21
SAS2778 Scandinavian Airlines System 6 2026-05-21
SAS2777 Scandinavian Airlines System 6 2026-05-21
SAS23A Scandinavian Airlines System 6 2026-05-21
SAS79E - 5 2026-04-17
SAS41W Scandinavian Airlines System 5 2026-05-29
TEST - 4 2026-04-15
SAS95W - 4 2026-04-17
SAS82E Scandinavian Airlines System 4 2026-05-30
SAS72U Scandinavian Airlines System 4 2026-05-29
SAS185 Scandinavian Airlines System 4 2026-05-27
SAS125 Scandinavian Airlines System 4 2026-05-27
SAS035 Scandinavian Airlines System 4 2026-04-30
SAS034 Scandinavian Airlines System 4 2026-04-30
SAS92U Scandinavian Airlines System 3 2026-05-13
SAS65Y Scandinavian Airlines System 3 2026-05-27
SAS581 Scandinavian Airlines System 3 2026-05-13
SAS31B Scandinavian Airlines System 3 2026-04-29
SAS130 Scandinavian Airlines System 3 2026-05-28
SAS987P Scandinavian Airlines System 2 2026-05-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 SAS7828 CHQ → ARN May 30, 09:10 UTCMay 30, 12:30 UTC3h 20m
2026-05-30 SAS82E ARN → CHQ May 30, 04:20 UTCMay 30, 07:40 UTC3h 20m
2026-05-29 SAS2029 UME → ARN May 29, 18:25 UTCMay 29, 19:10 UTC45m
2026-05-29 SAS2028 ARN → UME May 29, 17:00 UTCMay 29, 17:40 UTC40m
2026-05-29 SAS41W PMI → ARN May 29, 12:25 UTCMay 29, 15:50 UTC3h 25m
2026-05-29 SAS72U ARN → PMI May 29, 07:45 UTCMay 29, 11:05 UTC3h 20m
2026-05-28 SAS2142 GOT → ARN May 28, 18:55 UTCMay 28, 19:40 UTC45m
2026-05-28 SAS2141 ARN → GOT May 28, 17:30 UTCMay 28, 18:10 UTC40m
2026-05-28 SAS029 IRG → CUQ May 28, 15:55 UTCMay 28, 16:35 UTC40m
2026-05-28 SAS028 ARN → UME May 28, 14:05 UTCMay 28, 14:45 UTC40m
2026-05-28 SAS144 GOT → ARN May 28, 09:05 UTCMay 28, 09:55 UTC50m
2026-05-28 SAS143 ARN → GOT May 28, 07:20 UTCMay 28, 08:05 UTC45m
2026-05-28 SAS130 MMX → ARN May 28, 04:05 UTCMay 28, 05:05 UTC1h 0m
2026-05-27 SAS125 ARN → MMX May 27, 20:05 UTCMay 27, 20:55 UTC50m
2026-05-27 SAS63A GOT → GOT May 27, 17:50 UTCMay 27, 18:40 UTC50m
2026-05-27 SAS22A ARN → GOT May 27, 16:20 UTCMay 27, 17:00 UTC40m
2026-05-27 SAS65Y AGH → ARN May 27, 14:20 UTCMay 27, 15:15 UTC55m
2026-05-27 SAS185 ARN → AGH May 27, 12:45 UTCMay 27, 13:30 UTC45m
2026-05-27 SAS84B UME → ARN May 27, 10:55 UTCMay 27, 11:45 UTC50m
2026-05-27 SAS2026 ARN → UME May 27, 09:10 UTCMay 27, 09:45 UTC35m
2026-05-27 SAS58E CPH → ARN May 27, 07:15 UTCMay 27, 08:10 UTC55m
2026-05-27 SAS54C ARN → CPH May 27, 05:14 UTCMay 27, 06:09 UTC55m
2026-05-26 SAS1558 AMS → ARN May 26, 19:40 UTCMay 26, 21:14 UTC1h 35m
2026-05-26 SAS1557 ARN → AMS May 26, 17:04 UTCMay 26, 18:55 UTC1h 50m
2026-05-26 SAS65Y AGH → ARN May 26, 14:14 UTCMay 26, 15:09 UTC55m
2026-05-26 SAS185 ARN → AGH May 26, 12:30 UTCMay 26, 13:19 UTC50m
2026-05-26 SAS38M LHR → ARN May 26, 09:15 UTCMay 26, 11:05 UTC1h 50m
2026-05-26 SAS94B ARN → LHR May 26, 05:20 UTCMay 26, 07:49 UTC2h 30m
2026-05-25 SAS66P BRU → ARN May 25, 17:25 UTCMay 25, 19:10 UTC1h 45m
2026-05-25 SAS64U ARN → BRU May 25, 14:25 UTCMay 25, 16:25 UTC2h 0m
2026-05-25 SAS144 GOT → ARN May 25, 09:15 UTCMay 25, 09:55 UTC40m
2026-05-25 SAS143 ARN → GOT May 25, 07:40 UTCMay 25, 08:20 UTC40m
2026-05-24 SAS86L AGP → GOT May 24, 19:50 UTCMay 24, 21:45 UTC1h 55m
2026-05-24 SAS579 ARN → CDG May 24, 16:15 UTCMay 24, 18:25 UTC2h 10m
2026-05-24 SAS58M LIN → ARN May 24, 12:30 UTCMay 24, 15:05 UTC2h 35m
2026-05-24 SAS63Z ARN → LIN May 24, 09:00 UTCMay 24, 11:15 UTC2h 15m
2026-05-24 SAS46M CPH → ARN May 24, 06:10 UTCMay 24, 07:00 UTC50m
2026-05-23 SAS65K PMO → CPH May 23, 16:10 UTCMay 23, 18:50 UTC2h 40m
2026-05-23 SAS2695 CPH → PMO May 23, 12:25 UTCMay 23, 14:55 UTC2h 30m
2026-05-23 SAS10E VCE → CPH May 23, 09:15 UTCMay 23, 10:55 UTC1h 40m
2026-05-23 SAS31T CPH → VCE May 23, 06:25 UTCMay 23, 08:05 UTC1h 40m
2026-05-22 SAS1910 BIO → CPH May 22, 17:55 UTCMay 22, 20:15 UTC2h 20m
2026-05-22 SAS1909 CPH → BIO May 22, 13:55 UTCMay 22, 16:15 UTC2h 20m
2026-05-22 SAS47D NAP → CPH May 22, 10:15 UTCMay 22, 12:40 UTC2h 25m
2026-05-22 SAS81L CPH → CDG May 22, 06:45 UTCMay 22, 08:40 UTC1h 55m
2026-05-21 SAS2778 CPH → ATH May 21, 16:45 UTCMay 21, 19:45 UTC3h 0m
2026-05-21 SAS2777 ATH → CPH May 21, 12:45 UTCMay 21, 15:30 UTC2h 45m
2026-05-21 SAS23A MXP → CPH May 21, 09:30 UTCMay 21, 11:30 UTC2h 0m
2026-05-21 SAS71K CPH → MXP May 21, 06:45 UTCMay 21, 08:20 UTC1h 35m
2026-05-20 SAS688 MXP → CPH May 20, 18:25 UTCMay 20, 20:05 UTC1h 40m

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

Mode-S 4CAC7A frequently asked

What is Mode-S code 4CAC7A?
4CAC7A is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-SIK.
Where is Mode-S 4CAC7A registered?
Mode-S code 4CAC7A is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAC7A broadcasting right now?
Mode-S 4CAC7A is currently broadcasting from the ground.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAC7A, octal 23126172, decimal 5,024,890.
What flights does 4CAC7A operate?
Mode-S 4CAC7A has broadcast 20 distinct callsigns, including SAS71K, SAS2778, SAS2777, SAS23A, SAS79E.