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sensors Mode-S transponder

4CA6D9

ICAO 24-bit transponder address · allocated to Ireland

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

Hex
4CA6D9
Octal
23123331
Decimal
5,023,449
Country
IE
Tail
EI-FPG
Type
CRJ9
No current signal · last broadcast Jul 26, 22:15 UTC
Flights observed
636
Distinct callsigns
20
Country
IE
Last broadcast
Jul 26, 22:15 UTC

Last known position

Most recent position reported by Mode-S 4CA6D9.

Country allocation

The ICAO 24-bit address 4CA6D9 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
SAS1772 Scandinavian Airlines System 10 2026-07-21
SAS898 Scandinavian Airlines System 8 2026-07-21
SAS84P - 7 2026-07-22
SAS82T - 7 2026-07-20
SAS710 Scandinavian Airlines System 7 2026-06-12
SAS40L - 7 2026-07-20
SAS1771 - 7 2026-07-07
SAS1497 Scandinavian Airlines System 7 2026-06-11
SAS728 Scandinavian Airlines System 6 2026-06-11
SAS711 Scandinavian Airlines System 6 2026-06-12
SAS662 Scandinavian Airlines System 6 2026-06-10
SAS661 Scandinavian Airlines System 6 2026-06-10
SAS613 Scandinavian Airlines System 6 2026-07-23
SAS2498 - 6 2026-07-12
SAS2497 - 6 2026-07-12
SAS22P Scandinavian Airlines System 6 2026-07-23
SAS1790 Scandinavian Airlines System 6 2026-07-26
SAS1645 - 6 2026-07-18
SAS1644 - 6 2026-07-17
SAS1498 Scandinavian Airlines System 6 2026-06-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 SAS1790 CPH → TLL Jul 26, 21:10 UTCJul 26, 22:15 UTC1h 5m
2026-07-26 SAS9248 FRA → CPH Jul 26, 09:55 UTCJul 26, 10:50 UTC55m
2026-07-25 SAS42R AMS → CPH Jul 25, 21:10 UTCJul 25, 21:45 UTC35m
2026-07-25 SAS87Y CPH → AMS Jul 25, 12:20 UTCJul 25, 13:25 UTC1h 5m
2026-07-23 SAS57R MUC → CPH Jul 23, 18:45 UTCJul 23, 20:00 UTC1h 15m
2026-07-23 SAS2657 CPH → MUC Jul 23, 16:25 UTCJul 23, 17:30 UTC1h 5m
2026-07-23 SAS44T GDN → CPH Jul 23, 13:45 UTCJul 23, 14:30 UTC45m
2026-07-23 SAS75G - Jul 23, 11:55 UTCJul 23, 12:40 UTC45m
2026-07-23 SAS22P GVA → CPH Jul 23, 09:05 UTCJul 23, 10:50 UTC1h 45m
2026-07-23 SAS613 CPH → GVA Jul 23, 06:30 UTCJul 23, 08:10 UTC1h 40m
2026-07-22 SAS554 AMS → CPH Jul 22, 18:45 UTCJul 22, 19:45 UTC1h 0m
2026-07-22 SAS49M - Jul 22, 16:15 UTCJul 22, 17:15 UTC1h 0m
2026-07-22 SAS44T - Jul 22, 14:00 UTCJul 22, 14:30 UTC30m
2026-07-22 SAS75G - Jul 22, 12:10 UTCJul 22, 12:40 UTC30m
2026-07-22 SAS22P - Jul 22, 11:10 UTCJul 22, 11:35 UTC25m
2026-07-22 SAS84P TLL → CPH Jul 22, 03:10 UTCJul 22, 04:25 UTC1h 15m
2026-07-21 SAS1772 ARN → TLL Jul 21, 19:55 UTCJul 21, 20:35 UTC40m
2026-07-21 SAS1556 - Jul 21, 17:30 UTCJul 21, 19:10 UTC1h 40m
2026-07-21 SAS1555 ARN → AMS Jul 21, 14:20 UTCJul 21, 15:55 UTC1h 35m
2026-07-21 SAS84B - Jul 21, 12:10 UTCJul 21, 12:55 UTC45m
2026-07-21 SAS2026 - Jul 21, 10:20 UTCJul 21, 11:00 UTC40m
2026-07-21 SAS898 BGO → ARN Jul 21, 08:05 UTCJul 21, 09:10 UTC1h 5m
2026-07-21 SAS96X ARN → BGO Jul 21, 06:10 UTCJul 21, 07:20 UTC1h 10m
2026-07-21 SAS025 UME → ARN Jul 21, 04:25 UTCJul 21, 05:05 UTC40m
2026-07-20 SAS026 - Jul 20, 18:55 UTCJul 20, 19:25 UTC30m
2026-07-20 SAS1482 - Jul 20, 16:45 UTCJul 20, 17:55 UTC1h 10m
2026-07-20 SAS1481 ARN → BGO Jul 20, 15:00 UTCJul 20, 16:05 UTC1h 5m
2026-07-20 SAS82T TLL → ARN Jul 20, 13:30 UTCJul 20, 14:10 UTC40m
2026-07-20 SAS40L ARN → TLL Jul 20, 12:05 UTCJul 20, 12:45 UTC40m
2026-07-20 SAS1015 - Jul 20, 10:15 UTCJul 20, 11:10 UTC55m
2026-07-20 SAS1014 - Jul 20, 08:30 UTCJul 20, 09:20 UTC50m
2026-07-20 SAS705 HEL → ARN Jul 20, 06:35 UTCJul 20, 07:25 UTC50m
2026-07-20 SAS702 ARN → HEL Jul 20, 05:05 UTCJul 20, 05:45 UTC40m
2026-07-19 SAS2031 - Jul 19, 19:00 UTCJul 19, 19:45 UTC45m
2026-07-19 SAS2030 - Jul 19, 17:20 UTCJul 19, 17:55 UTC35m
2026-07-19 SAS84B - Jul 19, 15:40 UTCJul 19, 16:25 UTC45m
2026-07-19 SAS2026 - Jul 19, 14:10 UTCJul 19, 14:45 UTC35m
2026-07-19 SAS1015 - Jul 19, 12:30 UTCJul 19, 13:25 UTC55m
2026-07-19 SAS1014 - Jul 19, 10:55 UTCJul 19, 11:45 UTC50m
2026-07-19 SAS57J - Jul 19, 08:20 UTCJul 19, 09:50 UTC1h 30m
2026-07-19 SAS62Y - Jul 19, 06:20 UTCJul 19, 07:15 UTC55m
2026-07-18 SAS64E DUB → ARN Jul 18, 18:55 UTCJul 18, 21:15 UTC2h 20m
2026-07-18 SAS63H ARN → DUB Jul 18, 15:10 UTCJul 18, 17:25 UTC2h 15m
2026-07-18 SAS82T TLL → ARN Jul 18, 13:25 UTCJul 18, 14:05 UTC40m
2026-07-18 SAS36F CPH → TLL Jul 18, 11:00 UTCJul 18, 12:10 UTC1h 10m
2026-07-18 SAS1645 - Jul 18, 03:35 UTCJul 18, 04:40 UTC1h 5m
2026-07-17 SAS1644 CPH → RIX Jul 17, 21:15 UTCJul 17, 22:15 UTC1h 0m
2026-07-17 SAS2536 - Jul 17, 18:40 UTCJul 17, 20:04 UTC1h 25m
2026-07-17 SAS2535 - Jul 17, 15:40 UTCJul 17, 17:25 UTC1h 45m
2026-07-16 SAS85J PRG → CPH Jul 16, 08:25 UTCJul 16, 09:25 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-FPG page for operator, model, and routing details .

Mode-S 4CA6D9 frequently asked

What is Mode-S code 4CA6D9?
4CA6D9 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-FPG.
Where is Mode-S 4CA6D9 registered?
Mode-S code 4CA6D9 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CA6D9 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 22:15 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CA6D9, octal 23123331, decimal 5,023,449.
What flights does 4CA6D9 operate?
Mode-S 4CA6D9 has broadcast 20 distinct callsigns, including SAS1772, SAS898, SAS84P, SAS82T, SAS710.