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sensors Mode-S transponder

4CAF12

ICAO 24-bit transponder address · allocated to Ireland

Hex
4CAF12
Octal
23127422
Decimal
5,025,554
Country
IE
Broadcasting now · callsign SAS1798 · 35,025 ft
Flights observed
642
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 19:10 UTC

Current position

4CAF12 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CAF12 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
SAS764 Scandinavian Airlines System 9 2026-05-21
SAS763 Scandinavian Airlines System 9 2026-05-21
SAS2987 Scandinavian Airlines System 9 2026-06-07
SAS2986 Scandinavian Airlines System 9 2026-06-07
SAS2581 Scandinavian Airlines System 9 2026-06-10
SAS21M Scandinavian Airlines System 9 2026-07-24
SAS1641 Scandinavian Airlines System 9 2026-07-24
SAS710 - 8 2026-06-18
SAS662 Scandinavian Airlines System 8 2026-06-06
SAS661 Scandinavian Airlines System 8 2026-06-06
SAS648 Scandinavian Airlines System 8 2026-06-09
SAS647 Scandinavian Airlines System 8 2026-06-08
SAS2988 Scandinavian Airlines System 8 2026-06-06
SAS2893 Scandinavian Airlines System 8 2026-06-09
SAS2892 Scandinavian Airlines System 8 2026-06-09
SAS2582 Scandinavian Airlines System 8 2026-06-10
SAS1665 Scandinavian Airlines System 8 2026-06-12
SAS11N Scandinavian Airlines System 8 2026-06-12
SAS711 Scandinavian Airlines System 7 2026-06-18
SAS629 Scandinavian Airlines System 7 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS019 LLA → ARN Jul 26, 18:00 UTCJul 26, 19:00 UTC1h 0m
2026-07-26 SAS016 ARN → LLA Jul 26, 16:10 UTCJul 26, 17:05 UTC55m
2026-07-26 SAS31A - Jul 26, 14:05 UTCJul 26, 15:10 UTC1h 5m
2026-07-26 SAS12B ARN → LLA Jul 26, 12:10 UTCJul 26, 13:05 UTC55m
2026-07-26 SAS2023 UME → ARN Jul 26, 09:35 UTCJul 26, 10:15 UTC40m
2026-07-26 SAS024 ARN → UME Jul 26, 08:00 UTCJul 26, 08:35 UTC35m
2026-07-26 SAS025 UME → ARN Jul 26, 05:55 UTCJul 26, 06:40 UTC46m
2026-07-25 SAS026 ARN → UME Jul 25, 19:00 UTCJul 25, 19:35 UTC35m
2026-07-25 SAS30P LLA → ARN Jul 25, 16:35 UTCJul 25, 17:35 UTC1h 0m
2026-07-25 SAS2078 - Jul 25, 14:25 UTCJul 25, 15:40 UTC1h 15m
2026-07-25 SAS2079 - Jul 25, 12:10 UTCJul 25, 13:35 UTC1h 25m
2026-07-25 SAS69H ARN → LLA Jul 25, 10:15 UTCJul 25, 11:05 UTC50m
2026-07-25 SAS898 BGO → ARN Jul 25, 08:20 UTCJul 25, 09:20 UTC1h 0m
2026-07-25 SAS96X ARN → BGO Jul 25, 06:20 UTCJul 25, 07:30 UTC1h 10m
2026-07-25 SAS1771 TLL → ARN Jul 25, 03:35 UTCJul 25, 04:15 UTC40m
2026-07-24 SAS1790 CPH → TLL Jul 24, 21:15 UTCJul 24, 22:25 UTC1h 10m
2026-07-24 SAS48D AMS → CPH Jul 24, 15:55 UTCJul 24, 16:55 UTC1h 0m
2026-07-24 SAS1549 CPH → AMS Jul 24, 13:45 UTCJul 24, 14:45 UTC1h 0m
2026-07-24 SAS2867 BGO → CPH Jul 24, 11:30 UTCJul 24, 12:25 UTC55m
2026-07-24 SAS2866 CPH → BGO Jul 24, 09:35 UTCJul 24, 10:45 UTC1h 10m
2026-07-24 SAS21M HAM → CPH Jul 24, 08:00 UTCJul 24, 08:35 UTC35m
2026-07-24 SAS1641 CPH → HAM Jul 24, 06:25 UTCJul 24, 06:55 UTC30m
2026-07-24 SAS1645 RIX → CPH Jul 24, 03:25 UTCJul 24, 04:30 UTC1h 5m
2026-07-23 SAS1644 CPH → RIX Jul 23, 21:30 UTCJul 23, 22:35 UTC1h 5m
2026-07-23 SAS89B ZRH → CPH Jul 23, 18:45 UTCJul 23, 20:20 UTC1h 35m
2026-07-23 SAS609 CPH → ZRH Jul 23, 16:15 UTCJul 23, 17:30 UTC1h 15m
2026-07-23 SAS1713 HEL → CPH Jul 23, 14:00 UTCJul 23, 15:15 UTC1h 15m
2026-07-23 SAS1712 CPH → HEL Jul 23, 11:30 UTCJul 23, 12:55 UTC1h 25m
2026-07-23 SAS594 - Jul 23, 08:40 UTCJul 23, 09:55 UTC1h 15m
2026-07-23 SAS57B CPH → BRU Jul 23, 06:15 UTCJul 23, 07:20 UTC1h 5m
2026-07-22 SAS2752 WAW → CPH Jul 22, 18:05 UTCJul 22, 19:10 UTC1h 5m
2026-07-22 SAS2751 CPH → WAW Jul 22, 16:05 UTCJul 22, 17:05 UTC1h 0m
2026-07-22 SAS30U TLL → CPH Jul 22, 13:10 UTCJul 22, 14:25 UTC1h 15m
2026-07-22 SAS36F CPH → TLL Jul 22, 11:10 UTCJul 22, 12:10 UTC1h 0m
2026-07-13 SAS560 - Jul 13, 20:00 UTCJul 13, 21:25 UTC1h 25m
2026-07-13 SAS73C CPH → CDG Jul 13, 17:10 UTCJul 13, 18:45 UTC1h 35m
2026-07-13 SAS30U TLL → CPH Jul 13, 12:55 UTCJul 13, 14:15 UTC1h 20m
2026-07-13 SAS36F CPH → TLL Jul 13, 10:50 UTCJul 13, 12:00 UTC1h 10m
2026-07-13 SAS52R - Jul 13, 08:15 UTCJul 13, 09:20 UTC1h 5m
2026-07-13 SAS751 CPH → WAW Jul 13, 06:25 UTCJul 13, 07:30 UTC1h 5m
2026-07-12 SAS89B - Jul 12, 18:40 UTCJul 12, 20:05 UTC1h 25m
2026-07-12 SAS609 CPH → ZRH Jul 12, 16:10 UTCJul 12, 17:40 UTC1h 30m
2026-07-12 SAS44T - Jul 12, 13:35 UTCJul 12, 14:15 UTC40m
2026-07-12 SAS75G - Jul 12, 12:05 UTCJul 12, 12:45 UTC40m
2026-07-12 SAS85J PRG → CPH Jul 12, 08:25 UTCJul 12, 09:25 UTC1h 0m
2026-07-12 SAS767 - Jul 12, 06:35 UTCJul 12, 07:31 UTC55m
2026-07-12 SAS743 VNO → CPH Jul 12, 03:20 UTCJul 12, 04:35 UTC1h 15m
2026-07-11 SAS742 CPH → VNO Jul 11, 21:00 UTCJul 11, 22:20 UTC1h 20m
2026-07-11 SAS776 - Jul 11, 18:00 UTCJul 11, 20:00 UTC2h 0m
2026-07-11 SAS775 - Jul 11, 15:00 UTCJul 11, 16:55 UTC1h 55m

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 4CAF12 frequently asked

What is Mode-S code 4CAF12?
4CAF12 is an ICAO 24-bit transponder address. Allocated to Ireland.
Where is Mode-S 4CAF12 registered?
Mode-S code 4CAF12 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAF12 broadcasting right now?
Yes. Mode-S 4CAF12 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAF12, octal 23127422, decimal 5,025,554.
What flights does 4CAF12 operate?
Mode-S 4CAF12 has broadcast 20 distinct callsigns, including SAS764, SAS763, SAS2987, SAS2986, SAS2581.