Apparatus

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sensors Mode-S transponder

4CAD4B

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-AZF · BOEING 737-800

Hex
4CAD4B
Octal
23126513
Decimal
5,025,099
Country
IE
Tail
EI-AZF
Type
B738
No current signal · last broadcast Jul 26, 19:35 UTC
Flights observed
108
Distinct callsigns
18
Country
IE
Last broadcast
Jul 26, 19:35 UTC

Last known position

Most recent position reported by Mode-S 4CAD4B.

Country allocation

The ICAO 24-bit address 4CAD4B 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 18 distinct

Callsign Airline Flights Last seen
ABR403 ASL Airlines Ireland 20 2026-07-19
ABR402 - 20 2026-07-20
ABR426 ASL Airlines Ireland 12 2026-07-12
ABR425 - 11 2026-07-12
ABR469 - 10 2026-07-16
ABR468 ASL Airlines Ireland 9 2026-07-20
ABR420 - 5 2026-07-24
ABR421 - 4 2026-07-26
ABR294 - 3 2026-07-26
ABR291 - 3 2026-07-26
ABR2401 - 3 2026-05-06
RYR57AE - 1 2026-07-07
ABR2269 - 1 2026-07-02
ABR2225 - 1 2026-05-09
ABR2221 - 1 2026-05-08
ABR2203 - 1 2026-06-25
ABR2202 - 1 2026-06-15
ABR2201 - 1 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 ABR421 BCN → MXP Jul 26, 18:15 UTCJul 26, 19:30 UTC1h 15m
2026-07-26 ABR294 LEJ → BCN Jul 26, 14:00 UTCJul 26, 15:55 UTC1h 55m
2026-07-26 ABR291 BCN → LEJ Jul 26, 09:30 UTCJul 26, 11:30 UTC2h 0m
2026-07-24 ABR420 MXP → BCN Jul 24, 23:50 UTCJul 25, 01:05 UTC1h 15m
2026-07-24 ABR421 BCN → MXP Jul 24, 18:20 UTCJul 24, 19:40 UTC1h 20m
2026-07-24 ABR294 LEJ → BCN Jul 24, 13:50 UTCJul 24, 15:55 UTC2h 5m
2026-07-24 ABR291 BCN → LEJ Jul 24, 09:15 UTCJul 24, 11:15 UTC2h 0m
2026-07-23 ABR420 MXP → BCN Jul 23, 23:50 UTCJul 24, 00:55 UTC1h 5m
2026-07-23 ABR421 BCN → MXP Jul 23, 18:20 UTCJul 23, 19:30 UTC1h 10m
2026-07-23 ABR294 LEJ → BCN Jul 23, 13:55 UTCJul 23, 15:50 UTC1h 55m
2026-07-23 ABR291 BCN → LEJ Jul 23, 09:20 UTCJul 23, 11:20 UTC2h 0m
2026-07-22 ABR420 MXP → BCN Jul 22, 23:40 UTCJul 23, 00:50 UTC1h 10m
2026-07-20 ABR468 LEJ → MXP Jul 20, 15:15 UTCJul 20, 16:30 UTC1h 15m
2026-07-20 ABR402 - Jul 20, 04:00 UTCJul 20, 06:45 UTC2h 45m
2026-07-19 ABR403 LEJ → MAD Jul 19, 23:15 UTCJul 20, 01:50 UTC2h 35m
2026-07-19 ABR402 - Jul 19, 04:30 UTCJul 19, 07:15 UTC2h 45m
2026-07-18 ABR403 LEJ → MAD Jul 18, 23:15 UTCJul 19, 01:50 UTC2h 35m
2026-07-17 ABR402 - Jul 17, 04:04 UTCJul 17, 06:15 UTC2h 10m
2026-07-16 ABR403 - Jul 16, 23:29 UTCJul 17, 02:05 UTC2h 35m
2026-07-16 ABR469 MXP → HAJ Jul 16, 11:15 UTCJul 16, 12:40 UTC1h 25m
2026-07-15 ABR468 LEJ → MXP Jul 15, 16:05 UTCJul 15, 17:35 UTC1h 30m
2026-07-15 ABR469 MXP → HAJ Jul 15, 11:20 UTCJul 15, 12:40 UTC1h 20m
2026-07-14 ABR468 LEJ → MXP Jul 14, 15:35 UTCJul 14, 16:55 UTC1h 20m
2026-07-14 ABR469 MXP → HAJ Jul 14, 11:25 UTCJul 14, 12:50 UTC1h 25m
2026-07-12 ABR426 LGG → MXP Jul 12, 11:55 UTCJul 12, 13:01 UTC1h 5m
2026-07-12 ABR425 MXP → LGG Jul 12, 08:55 UTCJul 12, 10:01 UTC1h 5m
2026-07-07 RYR57AE - Jul 7, 22:20 UTCJul 7, 22:35 UTC15m
2026-07-07 ABR2201 BCN → MXP Jul 7, 06:45 UTCJul 7, 08:00 UTC1h 15m
2026-07-07 ABR420 MXP → BCN Jul 7, 00:00 UTCJul 7, 01:00 UTC1h 0m
2026-07-03 ABR468 LEJ → MXP Jul 3, 15:35 UTCJul 3, 16:45 UTC1h 10m
2026-07-03 ABR469 MXP → HAJ Jul 3, 11:25 UTCJul 3, 12:40 UTC1h 15m
2026-07-02 ABR2269 - Jul 2, 17:35 UTCJul 2, 18:50 UTC1h 15m
2026-07-02 ABR402 - Jul 2, 04:00 UTCJul 2, 06:25 UTC2h 25m
2026-07-01 ABR403 - Jul 1, 23:00 UTCJul 2, 01:15 UTC2h 15m
2026-07-01 ABR402 - Jul 1, 04:00 UTCJul 1, 06:20 UTC2h 20m
2026-06-30 ABR403 - Jun 30, 23:00 UTCJul 1, 01:30 UTC2h 30m
2026-06-30 ABR402 - Jun 30, 04:15 UTCJun 30, 06:30 UTC2h 15m
2026-06-29 ABR403 - Jun 29, 23:54 UTCJun 30, 02:10 UTC2h 15m
2026-06-29 ABR469 MXP → HAJ Jun 29, 11:50 UTCJun 29, 13:00 UTC1h 10m
2026-06-28 ABR468 LEJ → MXP Jun 28, 16:09 UTCJun 28, 17:25 UTC1h 15m
2026-06-28 ABR469 MXP → HAJ Jun 28, 11:35 UTCJun 28, 12:50 UTC1h 15m
2026-06-26 ABR468 LEJ → MXP Jun 26, 15:25 UTCJun 26, 16:39 UTC1h 15m
2026-06-26 ABR402 - Jun 26, 03:45 UTCJun 26, 06:00 UTC2h 15m
2026-06-25 ABR403 HAJ → MAD Jun 25, 23:05 UTCJun 26, 01:34 UTC2h 30m
2026-06-25 ABR2203 MXP → HAJ Jun 25, 19:05 UTCJun 25, 20:19 UTC1h 15m
2026-06-21 ABR468 LEJ → MXP Jun 21, 15:54 UTCJun 21, 17:24 UTC1h 30m
2026-06-21 ABR402 - Jun 21, 04:14 UTCJun 21, 06:35 UTC2h 20m
2026-06-20 ABR403 HAJ → MAD Jun 20, 23:14 UTCJun 21, 01:45 UTC2h 30m
2026-06-19 ABR402 - Jun 19, 03:44 UTCJun 19, 05:59 UTC2h 15m
2026-06-18 ABR403 HAJ → MAD Jun 18, 23:05 UTCJun 19, 01:34 UTC2h 29m

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

Mode-S 4CAD4B frequently asked

What is Mode-S code 4CAD4B?
4CAD4B is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-AZF.
Where is Mode-S 4CAD4B registered?
Mode-S code 4CAD4B is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAD4B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:35 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAD4B, octal 23126513, decimal 5,025,099.
What flights does 4CAD4B operate?
Mode-S 4CAD4B has broadcast 18 distinct callsigns, including ABR403, ABR402, ABR426, ABR425, ABR469.