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sensors Mode-S transponder

4CAFD8

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CAFD8
Octal
23127730
Decimal
5,025,752
Country
IE
Tail
EI-GEF
Type
CRJ9
No current signal · last broadcast Jul 26, 21:05 UTC
Flights observed
684
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 21:05 UTC

Last known position

Most recent position reported by Mode-S 4CAFD8.

Country allocation

The ICAO 24-bit address 4CAFD8 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
SAS99A Scandinavian Airlines System 14 2026-07-19
SAS68H - 14 2026-07-19
SAS34J - 11 2026-07-19
SAS1740 Scandinavian Airlines System 11 2026-06-03
SAS87R - 10 2026-07-19
SAS82T - 10 2026-07-12
SAS743 - 9 2026-07-19
SAS40L - 9 2026-07-12
SAS899 Scandinavian Airlines System 8 2026-06-02
SAS898 - 8 2026-07-08
SAS742 Scandinavian Airlines System 8 2026-07-18
SAS41T Scandinavian Airlines System 8 2026-06-03
SAS1772 - 8 2026-07-12
SAS740 Scandinavian Airlines System 7 2026-06-02
SAS739 Scandinavian Airlines System 7 2026-06-02
SAS2886 Scandinavian Airlines System 7 2026-07-06
SAS2883 - 7 2026-07-06
SAS2645 - 7 2026-07-08
SAS2498 - 7 2026-07-08
SAS2497 - 7 2026-07-08

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS2877 BGO → CPH Jul 26, 20:00 UTCJul 26, 21:00 UTC1h 0m
2026-07-26 SAS2876 CPH → BGO Jul 26, 18:15 UTCJul 26, 19:20 UTC1h 5m
2026-07-26 SAS48D AMS → CPH Jul 26, 16:30 UTCJul 26, 17:25 UTC55m
2026-07-26 SAS1549 CPH → AMS Jul 26, 13:45 UTCJul 26, 14:50 UTC1h 5m
2026-07-26 SAS1869 SVG → CPH Jul 26, 11:20 UTCJul 26, 12:10 UTC50m
2026-07-26 SAS1868 CPH → SVG Jul 26, 09:40 UTCJul 26, 10:35 UTC55m
2026-07-26 SAS21M HAM → CPH Jul 26, 07:50 UTCJul 26, 08:20 UTC30m
2026-07-26 SAS1641 CPH → HAM Jul 26, 06:20 UTCJul 26, 06:50 UTC31m
2026-07-26 SAS1705 HEL → CPH Jul 26, 03:40 UTCJul 26, 05:05 UTC1h 25m
2026-07-25 SAS45T CPH → HEL Jul 25, 21:05 UTCJul 25, 22:15 UTC1h 10m
2026-07-25 SAS2514 EDI → CPH Jul 25, 18:25 UTCJul 25, 19:45 UTC1h 20m
2026-07-25 SAS2513 CPH → EDI Jul 25, 15:40 UTCJul 25, 17:25 UTC1h 45m
2026-07-25 SAS1713 HEL → CPH Jul 25, 13:20 UTCJul 25, 14:45 UTC1h 25m
2026-07-25 SAS1712 CPH → HEL Jul 25, 10:55 UTCJul 25, 12:15 UTC1h 20m
2026-07-25 SAS62L AMS → CPH Jul 25, 08:35 UTCJul 25, 09:35 UTC1h 0m
2026-07-25 SAS2551 CPH → AMS Jul 25, 06:20 UTCJul 25, 07:20 UTC1h 0m
2026-07-25 SAS1705 HEL → CPH Jul 25, 03:40 UTCJul 25, 05:05 UTC1h 25m
2026-07-24 SAS45T CPH → HEL Jul 24, 21:10 UTCJul 24, 22:30 UTC1h 20m
2026-07-24 SAS2536 BHX → CPH Jul 24, 18:40 UTCJul 24, 20:05 UTC1h 25m
2026-07-24 SAS2535 CPH → BHX Jul 24, 15:45 UTCJul 24, 17:25 UTC1h 40m
2026-07-24 SAS1713 HEL → CPH Jul 24, 13:30 UTCJul 24, 14:55 UTC1h 25m
2026-07-24 SAS1712 CPH → HEL Jul 24, 11:05 UTCJul 24, 12:30 UTC1h 25m
2026-07-24 SAS684 CPH → MXP Jul 24, 07:30 UTCJul 24, 09:25 UTC1h 55m
2026-07-24 SAS683 MXP → CPH Jul 24, 04:30 UTCJul 24, 06:20 UTC1h 50m
2026-07-23 SAS1680 BER → CPH Jul 23, 19:35 UTCJul 23, 20:20 UTC45m
2026-07-23 SAS55L CPH → BER Jul 23, 17:55 UTCJul 23, 18:35 UTC40m
2026-07-23 SAS48D AMS → CPH Jul 23, 15:50 UTCJul 23, 16:55 UTC1h 5m
2026-07-23 SAS1549 CPH → AMS Jul 23, 13:30 UTCJul 23, 14:25 UTC55m
2026-07-23 SAS2867 BGO → CPH Jul 23, 11:25 UTCJul 23, 12:25 UTC1h 0m
2026-07-23 SAS2866 CPH → BGO Jul 23, 09:35 UTCJul 23, 10:35 UTC1h 0m
2026-07-23 SAS21M HAM → CPH Jul 23, 07:50 UTCJul 23, 08:25 UTC35m
2026-07-23 SAS1641 CPH → HAM Jul 23, 06:25 UTCJul 23, 06:55 UTC30m
2026-07-23 SAS1758 GDN → CPH Jul 23, 04:00 UTCJul 23, 04:45 UTC45m
2026-07-22 SAS753 - Jul 22, 21:15 UTCJul 22, 22:00 UTC45m
2026-07-22 SAS42Y - Jul 22, 17:30 UTCJul 22, 18:30 UTC1h 0m
2026-07-22 SAS59J CPH → DUS Jul 22, 15:30 UTCJul 22, 16:25 UTC55m
2026-07-22 SAS42R - Jul 22, 13:10 UTCJul 22, 14:10 UTC1h 0m
2026-07-22 SAS87Y - Jul 22, 11:15 UTCJul 22, 12:00 UTC45m
2026-07-22 SAS1758 GDN → CPH Jul 22, 04:00 UTCJul 22, 04:45 UTC45m
2026-07-21 SAS753 - Jul 21, 21:05 UTCJul 21, 21:50 UTC45m
2026-07-21 SAS85J PRG → CPH Jul 21, 08:40 UTCJul 21, 09:45 UTC1h 5m
2026-07-21 SAS767 CPH → PRG Jul 21, 06:40 UTCJul 21, 07:40 UTC1h 0m
2026-07-20 SAS1680 BER → CPH Jul 20, 19:45 UTCJul 20, 20:25 UTC40m
2026-07-20 SAS55L CPH → BER Jul 20, 17:55 UTCJul 20, 18:40 UTC45m
2026-07-20 SAS48D AMS → CPH Jul 20, 15:45 UTCJul 20, 16:45 UTC1h 0m
2026-07-20 SAS1549 - Jul 20, 13:40 UTCJul 20, 14:45 UTC1h 5m
2026-07-19 SAS87R VNO → CPH Jul 19, 13:05 UTCJul 19, 14:20 UTC1h 15m
2026-07-19 SAS34J CPH → VNO Jul 19, 10:55 UTCJul 19, 12:10 UTC1h 15m
2026-07-19 SAS99A TRD → CPH Jul 19, 08:15 UTCJul 19, 09:30 UTC1h 15m
2026-07-19 SAS68H CPH → TRD Jul 19, 06:15 UTCJul 19, 07:30 UTC1h 15m

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

Mode-S 4CAFD8 frequently asked

What is Mode-S code 4CAFD8?
4CAFD8 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-GEF.
Where is Mode-S 4CAFD8 registered?
Mode-S code 4CAFD8 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAFD8 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:05 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAFD8, octal 23127730, decimal 5,025,752.
What flights does 4CAFD8 operate?
Mode-S 4CAFD8 has broadcast 20 distinct callsigns, including SAS99A, SAS68H, SAS34J, SAS1740, SAS87R.