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sensors Mode-S transponder

4CAEB1

ICAO 24-bit transponder address · allocated to Ireland

Currently assigned to EI-RZH · BOEING 737 MAX 8

Hex
4CAEB1
Octal
23127261
Decimal
5,025,457
Country
IE
Tail
EI-RZH
Type
B38M
Broadcasting now · callsign NOS2850 · 36,000 ft
Flights observed
257
Distinct callsigns
20
Country
IE
Last broadcast
2h ago

Current position

4CAEB1 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4CAEB1 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
NOS7226 Neos 18 2026-07-12
NOS1446 Neos 12 2026-05-11
NOS2475 - 9 2026-07-09
NOS5680 - 8 2026-07-10
NOS85HB - 7 2026-05-16
NOS7619 Neos 7 2026-05-31
NOS3865 - 7 2026-07-08
NOS7700 - 6 2026-07-12
NOS6486 Neos 6 2026-07-11
NOS6485 - 6 2026-07-11
NOS6407 - 6 2026-07-11
NOS47PH Neos 6 2026-07-11
NOS4553 - 6 2026-07-09
NOS4552 - 6 2026-07-09
NOS44LL - 6 2026-07-12
NOS92MB - 5 2026-07-13
NOS79FT - 5 2026-07-10
NOS47QR Neos 5 2026-05-05
NOS46PP - 5 2026-04-28
NOS40RV - 5 2026-07-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 NOS18QV - Jul 14, 05:20 UTCJul 14, 07:30 UTC2h 10m
2026-07-13 NOS8604 - Jul 13, 13:50 UTCJul 13, 14:05 UTC15m
2026-07-13 NOS92MB - Jul 13, 10:50 UTCJul 13, 12:35 UTC1h 45m
2026-07-13 NOS54DP - Jul 13, 09:15 UTCJul 13, 09:25 UTC10m
2026-07-13 NOS40RV - Jul 13, 06:45 UTCJul 13, 08:10 UTC1h 25m
2026-07-12 NOS7226 BGY → RHO Jul 12, 17:40 UTCJul 12, 19:55 UTC2h 15m
2026-07-12 NOS7226 BGY → RHO Jul 12, 16:01 UTCJul 12, 16:25 UTC25m
2026-07-12 NOS7226 BGY → RHO Jul 12, 12:25 UTCJul 12, 14:50 UTC2h 25m
2026-07-12 NOS44LL - Jul 12, 07:10 UTCJul 12, 08:40 UTC1h 30m
2026-07-12 NOS7700 - Jul 12, 04:25 UTCJul 12, 05:55 UTC1h 30m
2026-07-11 NOS6486 IBZ → BGY Jul 11, 14:50 UTCJul 11, 16:25 UTC1h 35m
2026-07-11 NOS47PH BLQ → IBZ Jul 11, 11:50 UTCJul 11, 13:30 UTC1h 40m
2026-07-11 NOS6407 IBZ → BLQ Jul 11, 08:25 UTCJul 11, 09:55 UTC1h 30m
2026-07-11 NOS6485 BGY → IBZ Jul 11, 05:15 UTCJul 11, 06:50 UTC1h 35m
2026-07-10 NOS79FT - Jul 10, 20:15 UTCJul 10, 22:30 UTC2h 15m
2026-07-10 NOS32KN - Jul 10, 16:40 UTCJul 10, 19:05 UTC2h 25m
2026-07-10 NOS37CU - Jul 10, 12:50 UTCJul 10, 15:10 UTC2h 20m
2026-07-10 NOS5680 - Jul 10, 09:20 UTCJul 10, 11:25 UTC2h 5m
2026-07-09 NOS2475 - Jul 9, 21:00 UTCJul 10, 02:10 UTC5h 10m
2026-07-09 NOS4552 - Jul 9, 13:50 UTCJul 9, 19:20 UTC5h 30m
2026-07-09 NOS4553 - Jul 9, 06:15 UTCJul 9, 11:30 UTC5h 15m
2026-07-08 NOS2474 - Jul 8, 23:20 UTCJul 9, 04:50 UTC5h 30m
2026-07-08 NOS3865 - Jul 8, 07:20 UTCJul 8, 20:40 UTC13h 20m
2026-07-08 NOS8059 MXP → BGY Jul 8, 05:25 UTCJul 8, 05:45 UTC20m
2026-07-07 NOS14RP - Jul 7, 18:00 UTCJul 8, 00:40 UTC6h 40m
2026-07-07 NOS2986 BGY → FCO Jul 7, 16:15 UTCJul 7, 16:40 UTC25m
2026-07-07 NOS2052 MXP → MXP Jul 7, 08:00 UTCJul 7, 14:55 UTC6h 55m
2026-07-07 NOS1383 TLV → MXP Jul 7, 02:15 UTCJul 7, 05:55 UTC3h 40m
2026-07-06 NOS1382 MXP → TLV Jul 6, 21:25 UTCJul 7, 00:40 UTC3h 15m
2026-07-06 NOS8058 - Jul 6, 13:55 UTCJul 6, 14:15 UTC20m
2026-07-06 NOS92MB - Jul 6, 10:50 UTCJul 6, 12:35 UTC1h 45m
2026-07-06 NOS54DP - Jul 6, 09:30 UTCJul 6, 09:45 UTC15m
2026-07-06 NOS40RV - Jul 6, 07:00 UTCJul 6, 08:15 UTC1h 15m
2026-07-05 NOS7226 BGY → RHO Jul 5, 17:50 UTCJul 5, 20:10 UTC2h 20m
2026-07-05 NOS7226 BGY → RHO Jul 5, 16:00 UTCJul 5, 16:25 UTC25m
2026-07-05 NOS7226 BGY → RHO Jul 5, 12:20 UTCJul 5, 14:45 UTC2h 25m
2026-07-05 NOS44LL CTA → BGY Jul 5, 07:30 UTCJul 5, 09:00 UTC1h 30m
2026-07-05 NOS7700 BGY → CTA Jul 5, 04:45 UTCJul 5, 06:05 UTC1h 20m
2026-07-05 NOS8571 - Jul 5, 01:15 UTCJul 5, 02:35 UTC1h 20m
2026-07-04 NOS9570 - Jul 4, 22:20 UTCJul 4, 23:55 UTC1h 35m
2026-07-04 NOS31TW - Jul 4, 18:10 UTCJul 4, 20:35 UTC2h 25m
2026-07-04 NOS6486 IBZ → BGY Jul 4, 15:00 UTCJul 4, 16:45 UTC1h 45m
2026-07-04 NOS47PH BLQ → IBZ Jul 4, 11:55 UTCJul 4, 13:25 UTC1h 30m
2026-07-04 NOS6407 IBZ → BLQ Jul 4, 08:15 UTCJul 4, 09:55 UTC1h 40m
2026-07-04 NOS6485 - Jul 4, 05:15 UTCJul 4, 06:45 UTC1h 30m
2026-07-03 NOS79FT - Jul 3, 20:55 UTCJul 3, 23:20 UTC2h 25m
2026-07-03 NOS32KN - Jul 3, 17:15 UTCJul 3, 19:35 UTC2h 20m
2026-07-03 NOS37CU - Jul 3, 13:25 UTCJul 3, 15:50 UTC2h 25m
2026-07-03 NOS5680 BGY → AOK Jul 3, 09:55 UTCJul 3, 12:05 UTC2h 10m
2026-07-03 NOS2475 - Jul 3, 00:45 UTCJul 3, 02:45 UTC2h 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-RZH page for operator, model, and routing details .

Mode-S 4CAEB1 frequently asked

What is Mode-S code 4CAEB1?
4CAEB1 is an ICAO 24-bit transponder address. Allocated to Ireland. Assigned to EI-RZH.
Where is Mode-S 4CAEB1 registered?
Mode-S code 4CAEB1 is allocated to Ireland (IE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4CAEB1 broadcasting right now?
Yes. Mode-S 4CAEB1 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4CAEB1, octal 23127261, decimal 5,025,457.
What flights does 4CAEB1 operate?
Mode-S 4CAEB1 has broadcast 20 distinct callsigns, including NOS7226, NOS1446, NOS2475, NOS5680, NOS85HB.