Apparatus

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sensors Mode-S transponder

4B0281

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-AYR · AIRBUS A-320neo

Hex
4B0281
Octal
22601201
Decimal
4,915,841
Country
CH
Tail
HB-AYR
Type
A20N
No current signal · last broadcast Jul 26, 20:40 UTC
Flights observed
477
Distinct callsigns
20
Country
CH
Last broadcast
Jul 26, 20:40 UTC

Last known position

Most recent position reported by Mode-S 4B0281.

Country allocation

The ICAO 24-bit address 4B0281 falls within the block assigned to Switzerland (CH) by ICAO Annex 10, Volume III. Every aircraft registered in Switzerland 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
EZS91GN Easyjet Switzerland 6 2026-05-19
EZS72MD - 6 2026-07-12
EZS5845 Easyjet Switzerland 6 2026-05-19
EZS25QK - 6 2026-07-12
EJU79WZ - 6 2026-07-13
EJU48PU - 6 2026-07-13
EZS83FT Easyjet Switzerland 5 2026-05-10
EZS75BQ Easyjet Switzerland 5 2026-05-18
EZS73RT - 5 2026-07-09
EZS5835 Easyjet Switzerland 5 2026-05-10
EZS45BC - 5 2026-07-09
EZS19WQ - 5 2026-07-09
EZS12XR Easyjet Switzerland 5 2026-07-21
EJU12KH easyJet Europe 5 2026-05-24
EZS735X Easyjet Switzerland 4 2026-05-12
EZS68ZP Easyjet Switzerland 4 2026-05-18
EZS65UJ - 4 2026-07-15
EZS65HE Easyjet Switzerland 4 2026-07-20
EZS43XU Easyjet Switzerland 4 2026-07-20
EZS37YZ Easyjet Switzerland 4 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EZS34PY CPH → BSL Jul 26, 19:20 UTCJul 26, 20:35 UTC1h 15m
2026-07-26 EZS73TU BSL → CPH Jul 26, 16:55 UTCJul 26, 18:20 UTC1h 25m
2026-07-26 EZS47VV SUF → BSL Jul 26, 14:15 UTCJul 26, 16:00 UTC1h 45m
2026-07-26 EZS57GP BSL → SUF Jul 26, 11:25 UTCJul 26, 13:05 UTC1h 40m
2026-07-26 EZS64QE PMO → BSL Jul 26, 08:40 UTCJul 26, 10:25 UTC1h 45m
2026-07-26 EZS27BL BSL → PMO Jul 26, 05:45 UTCJul 26, 07:20 UTC1h 36m
2026-07-26 EZS71BM KEF → BSL Jul 26, 00:20 UTCJul 26, 03:30 UTC3h 10m
2026-07-25 EZS68EP BSL → KEF Jul 25, 19:30 UTCJul 25, 23:15 UTC3h 45m
2026-07-25 EZS1251 BSL → AGA Jul 25, 10:45 UTCJul 25, 18:15 UTC7h 30m
2026-07-25 EZS82DC SKG → BSL Jul 25, 07:30 UTCJul 25, 09:50 UTC2h 20m
2026-07-25 EZS52YT BSL → SKG Jul 25, 04:30 UTCJul 25, 06:25 UTC1h 55m
2026-07-24 EZS54KG BUD → BSL Jul 24, 19:00 UTCJul 24, 20:25 UTC1h 25m
2026-07-24 EZS74UB BSL → BUD Jul 24, 16:55 UTCJul 24, 18:15 UTC1h 20m
2026-07-24 EZS28NQ NAP → BSL Jul 24, 14:40 UTCJul 24, 16:00 UTC1h 20m
2026-07-24 EZS83UF BSL → NAP Jul 24, 12:00 UTCJul 24, 13:15 UTC1h 15m
2026-07-24 EZS52WA ATH → BSL Jul 24, 08:30 UTCJul 24, 11:10 UTC2h 40m
2026-07-24 EZS49KC GVA → ATH Jul 24, 04:30 UTCJul 24, 06:45 UTC2h 15m
2026-07-23 EZS91PX CPH → GVA Jul 23, 18:40 UTCJul 23, 20:10 UTC1h 30m
2026-07-23 EZS41MU GVA → CPH Jul 23, 15:55 UTCJul 23, 17:50 UTC1h 55m
2026-07-23 EZS84LU BOD → GVA Jul 23, 13:55 UTCJul 23, 14:50 UTC55m
2026-07-23 EZS46NT GVA → BOD Jul 23, 12:00 UTCJul 23, 13:05 UTC1h 5m
2026-07-23 EZS54RD OPO → GVA Jul 23, 09:20 UTCJul 23, 11:00 UTC1h 40m
2026-07-23 EZS74RG GVA → OPO Jul 23, 06:10 UTCJul 23, 08:15 UTC2h 5m
2026-07-22 EZS65RV GVA → GVA Jul 22, 04:25 UTCJul 22, 18:20 UTC13h 55m
2026-07-21 EJU79CA IBZ → GVA Jul 21, 19:40 UTCJul 21, 21:15 UTC1h 35m
2026-07-21 EJU85QE GVA → IBZ Jul 21, 17:20 UTCJul 21, 18:50 UTC1h 30m
2026-07-21 EZS24DN LIS → GVA Jul 21, 14:20 UTCJul 21, 16:15 UTC1h 55m
2026-07-21 EZS1465 GVA → LIS Jul 21, 10:30 UTCJul 21, 12:45 UTC2h 15m
2026-07-21 EZS14LH - Jul 21, 07:15 UTCJul 21, 09:20 UTC2h 5m
2026-07-21 EZS12XR GVA → PRN Jul 21, 04:35 UTCJul 21, 06:05 UTC1h 30m
2026-07-20 EZS37YZ TNG → GVA Jul 20, 19:00 UTCJul 20, 21:00 UTC2h 0m
2026-07-20 EZS1523 GVA → TOS Jul 20, 15:35 UTCJul 20, 17:55 UTC2h 20m
2026-07-20 EZS48YR - Jul 20, 12:20 UTCJul 20, 14:15 UTC1h 55m
2026-07-20 EZS87GD GVA → PRN Jul 20, 09:30 UTCJul 20, 11:05 UTC1h 35m
2026-07-20 EZS65HE AMS → GVA Jul 20, 06:55 UTCJul 20, 08:00 UTC1h 5m
2026-07-20 EZS43XU GVA → AMS Jul 20, 04:35 UTCJul 20, 05:45 UTC1h 10m
2026-07-19 EZS1510 SPU → GVA Jul 19, 19:50 UTCJul 19, 21:10 UTC1h 20m
2026-07-19 EZS1509 - Jul 19, 17:30 UTCJul 19, 18:35 UTC1h 5m
2026-07-19 EZS48YR - Jul 19, 14:25 UTCJul 19, 16:25 UTC2h 0m
2026-07-19 EZS87GD - Jul 19, 11:35 UTCJul 19, 13:00 UTC1h 25m
2026-07-19 EZS73NK - Jul 19, 08:40 UTCJul 19, 10:20 UTC1h 40m
2026-07-19 EZS31WH - Jul 19, 05:20 UTCJul 19, 06:40 UTC1h 20m
2026-07-18 EZS45GJ - Jul 18, 12:10 UTCJul 18, 13:10 UTC1h 0m
2026-07-18 EZS49KR - Jul 18, 10:00 UTCJul 18, 10:45 UTC45m
2026-07-18 EZS83TQ CAG → GVA Jul 18, 07:30 UTCJul 18, 09:00 UTC1h 30m
2026-07-18 EZS58ZV - Jul 18, 04:50 UTCJul 18, 05:55 UTC1h 5m
2026-07-17 EZS42JW LGW → GVA Jul 17, 16:19 UTCJul 17, 17:30 UTC1h 10m
2026-07-17 EZS72YG - Jul 17, 12:45 UTCJul 17, 13:50 UTC1h 5m
2026-07-17 EZS31QP ATH → GVA Jul 17, 09:04 UTCJul 17, 11:39 UTC2h 35m
2026-07-17 EZS37UH - Jul 17, 04:54 UTCJul 17, 07:14 UTC2h 20m

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 HB-AYR page for operator, model, and routing details .

Mode-S 4B0281 frequently asked

What is Mode-S code 4B0281?
4B0281 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-AYR.
Where is Mode-S 4B0281 registered?
Mode-S code 4B0281 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B0281 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 20:40 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B0281, octal 22601201, decimal 4,915,841.
What flights does 4B0281 operate?
Mode-S 4B0281 has broadcast 20 distinct callsigns, including EZS91GN, EZS72MD, EZS5845, EZS25QK, EJU79WZ.