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 13h ago
Flights observed
17
Distinct callsigns
13
Country
IE
Last broadcast
13h ago

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 13 distinct

Callsign Airline Flights Last seen
SAS40L - 2 2026-04-13
SAS2582 - 2 2026-04-14
SAS2581 Scandinavian Airlines System 2 2026-04-14
SAS1497 - 2 2026-04-13
SAS82T - 1 2026-04-13
SAS728 - 1 2026-04-12
SAS63A - 1 2026-04-12
SAS57F Scandinavian Airlines System 1 2026-04-13
SAS2498 - 1 2026-04-13
SAS2497 - 1 2026-04-13
SAS22A - 1 2026-04-12
SAS1772 - 1 2026-04-13
SAS1498 - 1 2026-04-13

Recent flights last 17

DateFlightRouteTakeoffLandingDuration
2026-04-14 SAS2582 - Apr 14, 09:10 UTCApr 14, 09:55 UTC45m
2026-04-14 SAS2582 - Apr 14, 08:45 UTCApr 14, 09:05 UTC20m
2026-04-14 SAS2581 CPH → LUX Apr 14, 07:10 UTCApr 14, 07:55 UTC45m
2026-04-14 SAS2581 CPH → LUX Apr 14, 06:45 UTCApr 14, 07:10 UTC25m
2026-04-13 SAS1772 - Apr 13, 19:55 UTCApr 13, 20:10 UTC15m
2026-04-13 SAS1498 - Apr 13, 17:40 UTCApr 13, 18:40 UTC1h 0m
2026-04-13 SAS1497 - Apr 13, 16:15 UTCApr 13, 17:00 UTC45m
2026-04-13 SAS1497 - Apr 13, 15:55 UTCApr 13, 16:15 UTC20m
2026-04-13 SAS82T - Apr 13, 13:05 UTCApr 13, 13:50 UTC45m
2026-04-13 SAS40L - Apr 13, 11:55 UTCApr 13, 12:15 UTC20m
2026-04-13 SAS40L ARN → TLL Apr 13, 11:20 UTCApr 13, 12:15 UTC55m
2026-04-13 SAS2498 - Apr 13, 08:30 UTCApr 13, 09:35 UTC1h 5m
2026-04-13 SAS2497 ARN → BLL Apr 13, 06:35 UTCApr 13, 07:45 UTC1h 10m
2026-04-13 SAS57F HEL → ARN Apr 13, 04:40 UTCApr 13, 05:25 UTC45m
2026-04-12 SAS728 - Apr 12, 20:10 UTCApr 12, 20:15 UTC5m
2026-04-12 SAS63A - Apr 12, 18:15 UTCApr 12, 18:55 UTC40m
2026-04-12 SAS22A - Apr 12, 17:15 UTCApr 12, 17:25 UTC10m

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 13h ago.
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 13 distinct callsigns, including SAS40L, SAS2582, SAS2581, SAS1497, SAS82T.