Apparatus

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sensors Mode-S transponder

4CAD87

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAD87
Octal
23126607
Decimal
5,025,159
Country
IE
Tail
EI-SIS
Type
A20N
Broadcasting now · callsign SAS791 · 15,225 ft
Flights observed
234
Distinct callsigns
20
Country
IE
Last broadcast
8h ago

Current position

4CAD87 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CAD87 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
SAS2778 Scandinavian Airlines System 9 2026-05-29
SAS2777 Scandinavian Airlines System 8 2026-05-29
SAS23A Scandinavian Airlines System 8 2026-05-29
SAS71K Scandinavian Airlines System 7 2026-05-29
SAS91Y Scandinavian Airlines System 5 2026-05-25
SAS77G Scandinavian Airlines System 5 2026-05-25
SAS52E Scandinavian Airlines System 5 2026-05-25
SAS44L Scandinavian Airlines System 5 2026-05-25
SAS594 Scandinavian Airlines System 4 2026-05-27
SAS57B Scandinavian Airlines System 4 2026-05-27
SAS1707 Scandinavian Airlines System 4 2026-05-25
SAS1706 Scandinavian Airlines System 4 2026-05-25
SAS1507 Scandinavian Airlines System 4 2026-04-30
SAS92U Scandinavian Airlines System 3 2026-05-28
SAS81L - 3 2026-04-13
SAS67L Scandinavian Airlines System 3 2026-05-27
SAS588 - 3 2026-04-13
SAS581 Scandinavian Airlines System 3 2026-05-28
SAS49K Scandinavian Airlines System 3 2026-04-30
SAS2872 Scandinavian Airlines System 3 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 SAS2778 CPH → ATH May 29, 16:45 UTCMay 29, 19:50 UTC3h 5m
2026-05-29 SAS2777 ATH → CPH May 29, 12:40 UTCMay 29, 15:20 UTC2h 40m
2026-05-29 SAS23A MXP → CPH May 29, 09:45 UTCMay 29, 11:35 UTC1h 50m
2026-05-29 SAS71K CPH → MXP May 29, 06:40 UTCMay 29, 08:20 UTC1h 40m
2026-05-28 SAS688 MXP → CPH May 28, 18:25 UTCMay 28, 20:10 UTC1h 45m
2026-05-28 SAS687 CPH → MXP May 28, 15:15 UTCMay 28, 17:00 UTC1h 45m
2026-05-28 SAS92U MAD → CPH May 28, 11:05 UTCMay 28, 13:50 UTC2h 45m
2026-05-28 SAS581 CPH → MAD May 28, 06:45 UTCMay 28, 09:25 UTC2h 40m
2026-05-28 SAS1705 HEL → CPH May 28, 03:20 UTCMay 28, 04:40 UTC1h 20m
2026-05-27 SAS45T CPH → HEL May 27, 21:10 UTCMay 27, 22:30 UTC1h 20m
2026-05-27 SAS67L BGO → CPH May 27, 18:50 UTCMay 27, 19:45 UTC55m
2026-05-27 SAS2872 CPH → BGO May 27, 16:55 UTCMay 27, 18:05 UTC1h 10m
2026-05-27 SAS1713 HEL → CPH May 27, 14:40 UTCMay 27, 16:00 UTC1h 20m
2026-05-27 SAS1712 CPH → HEL May 27, 11:45 UTCMay 27, 13:30 UTC1h 45m
2026-05-27 SAS594 BRU → CPH May 27, 08:40 UTCMay 27, 09:50 UTC1h 10m
2026-05-27 SAS57B CPH → BRU May 27, 06:15 UTCMay 27, 07:40 UTC1h 25m
2026-05-26 SAS2778 CPH → ATH May 26, 16:45 UTCMay 26, 19:45 UTC3h 0m
2026-05-26 SAS2777 ATH → CPH May 26, 12:45 UTCMay 26, 15:35 UTC2h 50m
2026-05-26 SAS23A MXP → CPH May 26, 09:49 UTCMay 26, 11:34 UTC1h 45m
2026-05-26 SAS71K CPH → MXP May 26, 06:54 UTCMay 26, 08:30 UTC1h 35m
2026-05-25 SAS52E PRG → CPH May 25, 19:00 UTCMay 25, 20:04 UTC1h 4m
2026-05-25 SAS44L CPH → PRG May 25, 17:05 UTCMay 25, 18:05 UTC1h 0m
2026-05-25 SAS91Y MXP → CPH May 25, 14:05 UTCMay 25, 15:55 UTC1h 50m
2026-05-25 SAS77G CPH → MXP May 25, 11:15 UTCMay 25, 12:55 UTC1h 40m
2026-05-25 SAS1707 HEL → CPH May 25, 08:30 UTCMay 25, 10:05 UTC1h 35m
2026-05-25 SAS1706 CPH → HEL May 25, 06:10 UTCMay 25, 07:30 UTC1h 20m
2026-05-24 SAS698 PSA → CPH May 24, 19:20 UTCMay 24, 21:10 UTC1h 50m
2026-05-24 SAS697 CPH → PSA May 24, 16:15 UTCMay 24, 18:10 UTC1h 55m
2026-05-24 SAS55H ATH → CPH May 24, 11:55 UTCMay 24, 15:00 UTC3h 5m
2026-05-24 SAS68R CPH → ATH May 24, 06:50 UTCMay 24, 09:45 UTC2h 55m
2026-05-23 SAS688 MXP → CPH May 23, 18:10 UTCMay 23, 20:05 UTC1h 55m
2026-05-23 SAS687 CPH → MXP May 23, 15:10 UTCMay 23, 16:50 UTC1h 40m
2026-05-23 SAS2994 HER → CPH May 23, 10:25 UTCMay 23, 13:35 UTC3h 10m
2026-05-23 SAS2993 CPH → HER May 23, 05:20 UTCMay 23, 08:15 UTC2h 55m
2026-05-22 SAS52E PRG → CPH May 22, 19:10 UTCMay 22, 20:10 UTC1h 0m
2026-05-22 SAS44L CPH → PRG May 22, 17:10 UTCMay 22, 18:10 UTC1h 0m
2026-05-22 SAS91Y MXP → CPH May 22, 14:15 UTCMay 22, 16:00 UTC1h 45m
2026-05-22 SAS77G CPH → MXP May 22, 11:10 UTCMay 22, 12:50 UTC1h 40m
2026-05-22 SAS1707 HEL → CPH May 22, 08:35 UTCMay 22, 10:00 UTC1h 25m
2026-05-22 SAS1706 CPH → HEL May 22, 06:10 UTCMay 22, 07:35 UTC1h 25m
2026-05-22 SAS1758 GDN → CPH May 22, 03:55 UTCMay 22, 04:45 UTC50m
2026-05-21 SAS753 CPH → GDN May 21, 21:15 UTCMay 21, 21:50 UTC35m
2026-05-21 SAS52E PRG → CPH May 21, 18:50 UTCMay 21, 19:50 UTC1h 0m
2026-05-21 SAS44L CPH → PRG May 21, 17:05 UTCMay 21, 17:55 UTC50m
2026-05-21 SAS91Y MXP → CPH May 21, 14:00 UTCMay 21, 15:45 UTC1h 45m
2026-05-21 SAS77G CPH → MXP May 21, 11:00 UTCMay 21, 12:40 UTC1h 40m
2026-05-21 SAS1707 HEL → CPH May 21, 08:15 UTCMay 21, 09:45 UTC1h 30m
2026-05-21 SAS1706 CPH → HEL May 21, 06:10 UTCMay 21, 07:25 UTC1h 15m
2026-05-20 SAS52E PRG → CPH May 20, 18:55 UTCMay 20, 19:55 UTC1h 0m
2026-05-20 SAS44L CPH → PRG May 20, 17:05 UTCMay 20, 18:05 UTC1h 0m

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

Mode-S 4CAD87 frequently asked

What is Mode-S code 4CAD87?
4CAD87 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-SIS.
Where is Mode-S 4CAD87 registered?
Mode-S code 4CAD87 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAD87 broadcasting right now?
Yes. Mode-S 4CAD87 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAD87, octal 23126607, decimal 5,025,159.
What flights does 4CAD87 operate?
Mode-S 4CAD87 has broadcast 20 distinct callsigns, including SAS2778, SAS2777, SAS23A, SAS71K, SAS91Y.