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sensors Mode-S transponder

4CAF13

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAF13
Octal
23127423
Decimal
5,025,555
Country
IE
Tail
EI-HSC
Type
CRJ9
No current signal · last broadcast 4h ago
Flights observed
298
Distinct callsigns
20
Country
IE
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 4CAF13.

Country allocation

The ICAO 24-bit address 4CAF13 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
SAS75G - 6 2026-07-07
SAS753 - 6 2026-07-07
SAS613 - 6 2026-07-01
SAS44T - 6 2026-07-07
SAS22P - 6 2026-07-01
SAS1758 - 6 2026-07-08
SAS99A - 5 2026-07-11
SAS743 - 5 2026-07-13
SAS68H - 5 2026-07-11
SAS1644 - 5 2026-07-13
SAS87R - 4 2026-07-11
SAS745 Scandinavian Airlines System 4 2026-06-08
SAS73C Scandinavian Airlines System 4 2026-07-03
SAS59J - 4 2026-06-30
SAS57R - 4 2026-07-10
SAS560 - 4 2026-07-03
SAS42Y - 4 2026-06-30
SAS36F - 4 2026-07-09
SAS34J - 4 2026-07-11
SAS30U - 4 2026-07-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 SAS1644 - Jul 13, 21:15 UTCJul 13, 22:20 UTC1h 5m
2026-07-13 SAS554 - Jul 13, 18:45 UTCJul 13, 19:45 UTC1h 0m
2026-07-13 SAS49M CPH → AMS Jul 13, 16:20 UTCJul 13, 17:20 UTC1h 0m
2026-07-13 SAS1643 - Jul 13, 12:50 UTCJul 13, 14:00 UTC1h 10m
2026-07-13 SAS1642 - Jul 13, 11:05 UTCJul 13, 12:05 UTC1h 0m
2026-07-13 SAS1694 VIE → CPH Jul 13, 08:30 UTCJul 13, 09:45 UTC1h 15m
2026-07-13 SAS1693 - Jul 13, 05:55 UTCJul 13, 07:20 UTC1h 25m
2026-07-13 SAS743 VNO → CPH Jul 13, 03:20 UTCJul 13, 04:35 UTC1h 15m
2026-07-12 SAS742 CPH → VNO Jul 12, 21:00 UTCJul 12, 22:20 UTC1h 20m
2026-07-12 SAS554 AMS → CPH Jul 12, 18:50 UTCJul 12, 19:45 UTC55m
2026-07-12 SAS49M CPH → AMS Jul 12, 16:30 UTCJul 12, 17:35 UTC1h 5m
2026-07-12 SAS604 ZRH → CPH Jul 12, 14:10 UTCJul 12, 15:30 UTC1h 20m
2026-07-12 SAS603 CPH → ZRH Jul 12, 11:15 UTCJul 12, 12:45 UTC1h 30m
2026-07-12 SAS1875 - Jul 12, 08:35 UTCJul 12, 09:30 UTC55m
2026-07-12 SAS1870 CPH → SVG Jul 12, 06:40 UTCJul 12, 07:35 UTC55m
2026-07-11 SAS87R VNO → CPH Jul 11, 13:10 UTCJul 11, 14:20 UTC1h 10m
2026-07-11 SAS34J CPH → VNO Jul 11, 11:05 UTCJul 11, 12:30 UTC1h 25m
2026-07-11 SAS99A TRD → CPH Jul 11, 08:20 UTCJul 11, 09:35 UTC1h 15m
2026-07-11 SAS68H CPH → TRD Jul 11, 06:15 UTCJul 11, 07:35 UTC1h 20m
2026-07-11 SAS1645 - Jul 11, 03:30 UTCJul 11, 04:35 UTC1h 5m
2026-07-10 SAS1644 CPH → RIX Jul 10, 21:15 UTCJul 10, 22:20 UTC1h 5m
2026-07-10 SAS57R - Jul 10, 18:50 UTCJul 10, 20:00 UTC1h 10m
2026-07-10 SAS2657 - Jul 10, 16:20 UTCJul 10, 17:35 UTC1h 15m
2026-07-10 SAS2893 - Jul 10, 13:25 UTCJul 10, 14:35 UTC1h 10m
2026-07-10 SAS2892 - Jul 10, 11:15 UTCJul 10, 12:15 UTC1h 0m
2026-07-10 SAS1694 VIE → CPH Jul 10, 08:30 UTCJul 10, 09:55 UTC1h 25m
2026-07-10 SAS1693 CPH → VIE Jul 10, 06:25 UTCJul 10, 07:35 UTC1h 10m
2026-07-10 SAS743 VNO → CPH Jul 10, 03:15 UTCJul 10, 04:25 UTC1h 10m
2026-07-09 SAS742 CPH → VNO Jul 9, 21:00 UTCJul 9, 22:15 UTC1h 15m
2026-07-09 SAS57R MUC → CPH Jul 9, 18:35 UTCJul 9, 19:50 UTC1h 15m
2026-07-09 SAS2657 CPH → MUC Jul 9, 16:10 UTCJul 9, 17:20 UTC1h 10m
2026-07-09 SAS30U TLL → CPH Jul 9, 13:40 UTCJul 9, 14:55 UTC1h 15m
2026-07-09 SAS36F - Jul 9, 11:00 UTCJul 9, 12:20 UTC1h 20m
2026-07-09 SAS46R - Jul 9, 08:20 UTCJul 9, 09:50 UTC1h 30m
2026-07-09 SAS82A CPH → CDG Jul 9, 05:20 UTCJul 9, 06:50 UTC1h 30m
2026-07-08 SAS1643 - Jul 8, 13:10 UTCJul 8, 14:20 UTC1h 10m
2026-07-08 SAS1642 - Jul 8, 11:10 UTCJul 8, 12:10 UTC1h 0m
2026-07-08 SAS52R - Jul 8, 08:15 UTCJul 8, 09:20 UTC1h 5m
2026-07-08 SAS751 - Jul 8, 06:15 UTCJul 8, 07:15 UTC1h 0m
2026-07-08 SAS1758 GDN → CPH Jul 8, 04:00 UTCJul 8, 04:45 UTC45m
2026-07-07 SAS753 - Jul 7, 21:35 UTCJul 7, 22:15 UTC40m
2026-07-07 SAS1680 BER → CPH Jul 7, 20:05 UTCJul 7, 20:50 UTC45m
2026-07-07 SAS55L - Jul 7, 18:30 UTCJul 7, 19:05 UTC35m
2026-07-07 SAS44T - Jul 7, 17:00 UTCJul 7, 17:35 UTC35m
2026-07-07 SAS75G - Jul 7, 15:30 UTCJul 7, 16:10 UTC40m
2026-07-07 SAS1643 - Jul 7, 12:50 UTCJul 7, 14:10 UTC1h 20m
2026-07-07 SAS1642 - Jul 7, 11:00 UTCJul 7, 12:00 UTC1h 0m
2026-07-07 SAS85J PRG → CPH Jul 7, 08:30 UTCJul 7, 09:40 UTC1h 10m
2026-07-07 SAS767 - Jul 7, 06:25 UTCJul 7, 07:25 UTC1h 0m
2026-07-07 SAS1705 HEL → CPH Jul 7, 03:50 UTCJul 7, 05:15 UTC1h 25m

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

Mode-S 4CAF13 frequently asked

What is Mode-S code 4CAF13?
4CAF13 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HSC.
Where is Mode-S 4CAF13 registered?
Mode-S code 4CAF13 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAF13 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 4CAF13, octal 23127423, decimal 5,025,555.
What flights does 4CAF13 operate?
Mode-S 4CAF13 has broadcast 20 distinct callsigns, including SAS75G, SAS753, SAS613, SAS44T, SAS22P.