sensors Mode-S transponder

4CABDB

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-HIB · BOMBARDIER Regional Jet CRJ-1000

Hex
4CABDB
Octal
23125733
Decimal
5,024,731
Country
IE
Tail
EI-HIB
Type
CRJX
No current signal · last broadcast 16h ago
Flights observed
15
Distinct callsigns
11
Country
IE
Last broadcast
16h ago

Last known position

Most recent position reported by Mode-S 4CABDB.

Country allocation

The ICAO 24-bit address 4CABDB 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 11 distinct

Callsign Airline Flights Last seen
SAS684 Scandinavian Airlines System 3 2026-04-13
SAS1621 - 3 2026-04-13
SAS89L - 1 2026-04-13
SAS683 - 1 2026-04-13
SAS2988 - 1 2026-04-13
SAS21M - 1 2026-04-14
SAS1656 - 1 2026-04-13
SAS1641 Scandinavian Airlines System 1 2026-04-14
SAS1622 - 1 2026-04-13
SAS1522 - 1 2026-04-12
SAS1521 - 1 2026-04-12

Recent flights last 15

DateFlightRouteTakeoffLandingDuration
2026-04-14 SAS21M - Apr 14, 07:50 UTCApr 14, 08:20 UTC30m
2026-04-14 SAS1641 CPH → HAM Apr 14, 06:35 UTCApr 14, 07:10 UTC35m
2026-04-13 SAS2988 - Apr 13, 21:35 UTCApr 13, 22:10 UTC35m
2026-04-13 SAS1656 - Apr 13, 18:25 UTCApr 13, 19:35 UTC1h 10m
2026-04-13 SAS89L - Apr 13, 16:20 UTCApr 13, 17:35 UTC1h 15m
2026-04-13 SAS1622 - Apr 13, 13:30 UTCApr 13, 14:30 UTC1h 0m
2026-04-13 SAS1621 - Apr 13, 12:20 UTCApr 13, 12:40 UTC20m
2026-04-13 SAS1621 - Apr 13, 11:55 UTCApr 13, 12:40 UTC45m
2026-04-13 SAS1621 - Apr 13, 11:35 UTCApr 13, 12:15 UTC40m
2026-04-13 SAS684 CPH → MXP Apr 13, 08:20 UTCApr 13, 09:05 UTC45m
2026-04-13 SAS684 CPH → MXP Apr 13, 07:55 UTCApr 13, 09:05 UTC1h 10m
2026-04-13 SAS684 CPH → MXP Apr 13, 07:25 UTCApr 13, 08:15 UTC50m
2026-04-13 SAS683 CPH → MXP Apr 13, 04:20 UTCApr 13, 06:20 UTC2h 0m
2026-04-12 SAS1522 ABZ → CPH Apr 12, 18:20 UTCApr 12, 19:35 UTC1h 15m
2026-04-12 SAS1521 - Apr 12, 17:15 UTCApr 12, 17:30 UTC15m

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

Mode-S 4CABDB frequently asked

What is Mode-S code 4CABDB?
4CABDB is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-HIB.
Where is Mode-S 4CABDB registered?
Mode-S code 4CABDB is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CABDB broadcasting right now?
No active broadcast right now. Last signal was 16h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CABDB, octal 23125733, decimal 5,024,731.
What flights does 4CABDB operate?
Mode-S 4CABDB has broadcast 11 distinct callsigns, including SAS684, SAS1621, SAS89L, SAS683, SAS2988.