Apparatus

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sensors Mode-S transponder

4CA536

ICAO 24-bit transponder address · allocated to Ireland

Hex
4CA536
Octal
23122466
Decimal
5,023,030
Country
IE
No current signal · last broadcast 4h ago
Flights observed
223
Distinct callsigns
20
Country
IE
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 4CA536.

Country allocation

The ICAO 24-bit address 4CA536 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
TEST - 6 2026-05-28
SAS58E Scandinavian Airlines System 4 2026-06-15
SAS54C - 4 2026-06-15
SAS31T - 3 2026-07-10
SAS10E - 3 2026-07-10
SAS96T - 2 2026-06-19
SAS95T - 2 2026-06-19
SAS91Y Scandinavian Airlines System 2 2026-06-07
SAS87T - 2 2026-07-11
SAS85Y Scandinavian Airlines System 2 2026-05-30
SAS84B Scandinavian Airlines System 2 2026-06-10
SAS77G Scandinavian Airlines System 2 2026-06-07
SAS72U - 2 2026-06-29
SAS68R - 2 2026-07-04
SAS67M - 2 2026-06-28
SAS65D - 2 2026-07-08
SAS63Z - 2 2026-06-21
SAS63Y - 2 2026-07-14
SAS596 Scandinavian Airlines System 2 2026-06-06
SAS595 Scandinavian Airlines System 2 2026-06-06

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 SAS588 - Jul 14, 18:30 UTCJul 14, 21:35 UTC3h 5m
2026-07-14 SAS63Y - Jul 14, 13:40 UTCJul 14, 17:15 UTC3h 35m
2026-07-14 SAS2990 - Jul 14, 09:25 UTCJul 14, 11:55 UTC2h 30m
2026-07-14 SAS2989 - Jul 14, 05:10 UTCJul 14, 07:15 UTC2h 5m
2026-07-13 SAS2768 - Jul 13, 16:15 UTCJul 13, 19:15 UTC3h 0m
2026-07-13 SAS44A CPH → MLA Jul 13, 12:25 UTCJul 13, 15:15 UTC2h 50m
2026-07-13 SAS790 - Jul 13, 08:15 UTCJul 13, 10:20 UTC2h 5m
2026-07-13 SAS789 - Jul 13, 04:40 UTCJul 13, 07:01 UTC2h 20m
2026-07-12 SAS2778 ATH → CPH Jul 12, 18:30 UTCJul 12, 21:25 UTC2h 55m
2026-07-12 SAS2777 CPH → ATH Jul 12, 14:10 UTCJul 12, 17:05 UTC2h 55m
2026-07-12 SAS2814 - Jul 12, 09:05 UTCJul 12, 11:50 UTC2h 45m
2026-07-12 SAS2813 - Jul 12, 04:35 UTCJul 12, 07:45 UTC3h 10m
2026-07-11 SAS2774 OPO → CPH Jul 11, 20:05 UTCJul 11, 23:00 UTC2h 55m
2026-07-11 SAS2773 CPH → OPO Jul 11, 15:40 UTCJul 11, 18:40 UTC3h 0m
2026-07-11 SAS431 - Jul 11, 13:40 UTCJul 11, 14:05 UTC25m
2026-07-11 SAS430 - Jul 11, 12:15 UTCJul 11, 12:50 UTC35m
2026-07-11 SAS45F - Jul 11, 09:40 UTCJul 11, 11:10 UTC1h 30m
2026-07-11 SAS21D CPH → CDG Jul 11, 06:40 UTCJul 11, 08:10 UTC1h 30m
2026-07-11 SAS87T - Jul 11, 04:05 UTCJul 11, 04:30 UTC25m
2026-07-10 SAS448 CPH → GOT Jul 10, 21:20 UTCJul 10, 21:50 UTC30m
2026-07-10 SAS10E VCE → CPH Jul 10, 18:05 UTCJul 10, 19:45 UTC1h 40m
2026-07-10 SAS31T CPH → VCE Jul 10, 15:05 UTCJul 10, 16:45 UTC1h 40m
2026-07-10 SAS2802 LIS → CPH Jul 10, 10:50 UTCJul 10, 14:00 UTC3h 10m
2026-07-10 SAS2801 CPH → LIS Jul 10, 05:50 UTCJul 10, 09:15 UTC3h 25m
2026-07-09 SAS2994 - Jul 9, 19:45 UTCJul 9, 23:05 UTC3h 20m
2026-07-09 SAS2993 - Jul 9, 15:30 UTCJul 9, 18:10 UTC2h 40m
2026-07-08 SAS51B BCN → CPH Jul 8, 17:35 UTCJul 8, 20:15 UTC2h 40m
2026-07-08 SAS65D CPH → BCN Jul 8, 13:20 UTCJul 8, 15:40 UTC2h 20m
2026-07-08 SAS584 - Jul 8, 09:00 UTCJul 8, 12:20 UTC3h 20m
2026-07-08 SAS583 - Jul 8, 04:10 UTCJul 8, 07:20 UTC3h 10m
2026-07-07 SAS51B BCN → CPH Jul 7, 17:20 UTCJul 7, 20:05 UTC2h 45m
2026-07-07 SAS65D - Jul 7, 13:25 UTCJul 7, 15:45 UTC2h 20m
2026-07-07 SAS23A MXP → CPH Jul 7, 10:15 UTCJul 7, 12:10 UTC1h 55m
2026-07-07 SAS71K - Jul 7, 06:35 UTCJul 7, 08:45 UTC2h 10m
2026-07-06 SAS10E VCE → CPH Jul 6, 17:55 UTCJul 6, 19:45 UTC1h 50m
2026-07-06 SAS31T - Jul 6, 15:05 UTCJul 6, 16:35 UTC1h 30m
2026-07-06 SAS2992 RHO → CPH Jul 6, 09:30 UTCJul 6, 13:00 UTC3h 30m
2026-07-06 SAS2991 - Jul 6, 04:50 UTCJul 6, 07:50 UTC3h 0m
2026-07-05 SAS2990 - Jul 5, 17:35 UTCJul 5, 20:10 UTC2h 35m
2026-07-05 SAS2989 - Jul 5, 14:05 UTCJul 5, 16:05 UTC2h 0m
2026-07-05 SAS42K - Jul 5, 09:35 UTCJul 5, 12:00 UTC2h 25m
2026-07-05 SAS49L - Jul 5, 06:00 UTCJul 5, 08:00 UTC2h 0m
2026-07-04 SAS792 NCE → CPH Jul 4, 18:25 UTCJul 4, 20:30 UTC2h 5m
2026-07-04 SAS791 - Jul 4, 15:10 UTCJul 4, 17:10 UTC2h 0m
2026-07-04 SAS55H ATH → CPH Jul 4, 10:40 UTCJul 4, 13:40 UTC3h 0m
2026-07-04 SAS68R - Jul 4, 06:15 UTCJul 4, 08:55 UTC2h 40m
2026-07-01 SAS588 - Jul 1, 18:20 UTCJul 1, 21:40 UTC3h 20m
2026-07-01 SAS63Y - Jul 1, 13:50 UTCJul 1, 16:55 UTC3h 5m
2026-07-01 SAS1914 - Jul 1, 09:50 UTCJul 1, 12:45 UTC2h 55m
2026-07-01 SAS1913 - Jul 1, 04:50 UTCJul 1, 08:00 UTC3h 10m

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.

Mode-S 4CA536 frequently asked

What is Mode-S code 4CA536?
4CA536 is an ICAO 24-bit transponder address. Allocated to Ireland.
Where is Mode-S 4CA536 registered?
Mode-S code 4CA536 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA536 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 4CA536, octal 23122466, decimal 5,023,030.
What flights does 4CA536 operate?
Mode-S 4CA536 has broadcast 20 distinct callsigns, including TEST, SAS58E, SAS54C, SAS31T, SAS10E.