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
Broadcasting now · callsign EJU51MB · 37,025 ft
Flights observed
419
Distinct callsigns
20
Country
CH
Last broadcast
49m ago

Current position

4B0281 is currently broadcasting. Map zoomed to live position.

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
EJU12KH easyJet Europe 5 2026-05-24
EZS735X Easyjet Switzerland 4 2026-05-12
EZS68ZP Easyjet Switzerland 4 2026-05-18
EZS12XR - 4 2026-07-11
EJU98HB - 4 2026-05-17
EJU47HM easyJet Europe 4 2026-05-17
EJU38WN easyJet Europe 4 2026-05-20
EJU38CG easyJet Europe 4 2026-05-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 EJU51MB - Jul 14, 11:40 UTCJul 14, 12:15 UTC35m
2026-07-14 EZS41ZM - Jul 14, 08:10 UTCJul 14, 10:40 UTC2h 30m
2026-07-14 EZS52KU - Jul 14, 04:30 UTCJul 14, 06:30 UTC2h 0m
2026-07-13 EZS64DZ - Jul 13, 19:05 UTCJul 13, 20:30 UTC1h 25m
2026-07-13 EZS52NT - Jul 13, 16:55 UTCJul 13, 18:15 UTC1h 20m
2026-07-13 EJU79WZ - Jul 13, 14:20 UTCJul 13, 15:45 UTC1h 25m
2026-07-13 EJU48PU - Jul 13, 11:35 UTCJul 13, 13:10 UTC1h 35m
2026-07-13 EZS52WA ATH → BSL Jul 13, 08:01 UTCJul 13, 10:45 UTC2h 45m
2026-07-13 EZS49KC GVA → ATH Jul 13, 04:35 UTCJul 13, 06:50 UTC2h 15m
2026-07-12 EZS72MD OPO → GVA Jul 12, 19:30 UTCJul 12, 21:10 UTC1h 40m
2026-07-12 EZS25QK GVA → OPO Jul 12, 16:25 UTCJul 12, 18:30 UTC2h 5m
2026-07-12 EZS64FU - Jul 12, 10:40 UTCJul 12, 14:50 UTC4h 10m
2026-07-12 EZS68XT - Jul 12, 05:01 UTCJul 12, 08:40 UTC3h 40m
2026-07-11 EZS17GH BOD → GVA Jul 11, 20:05 UTCJul 11, 21:00 UTC55m
2026-07-11 EZS63WG GVA → BOD Jul 11, 18:10 UTCJul 11, 19:10 UTC1h 0m
2026-07-11 EZS63BD LIS → GVA Jul 11, 15:10 UTCJul 11, 17:15 UTC2h 5m
2026-07-11 EZS79YP - Jul 11, 11:30 UTCJul 11, 13:35 UTC2h 5m
2026-07-11 EZS14LH - Jul 11, 08:15 UTCJul 11, 10:05 UTC1h 50m
2026-07-11 EZS12XR - Jul 11, 05:15 UTCJul 11, 06:55 UTC1h 40m
2026-07-10 EJU43TE BCN → GVA Jul 10, 18:05 UTCJul 10, 19:10 UTC1h 5m
2026-07-10 EJU42GT GVA → BCN Jul 10, 15:40 UTCJul 10, 17:00 UTC1h 20m
2026-07-10 EZS59MN NCE → GVA Jul 10, 11:50 UTCJul 10, 12:25 UTC35m
2026-07-10 EZS1395 GVA → NCE Jul 10, 10:10 UTCJul 10, 10:55 UTC45m
2026-07-10 EZS51JQ LGW → GVA Jul 10, 08:00 UTCJul 10, 09:15 UTC1h 15m
2026-07-10 EZS51PA GVA → LGW Jul 10, 05:05 UTCJul 10, 06:15 UTC1h 10m
2026-07-09 EZS73RT - Jul 9, 18:25 UTCJul 9, 20:15 UTC1h 50m
2026-07-09 EZS19WQ - Jul 9, 15:40 UTCJul 9, 17:15 UTC1h 35m
2026-07-09 EZS45BC GVA → GVA Jul 9, 04:05 UTCJul 9, 13:50 UTC9h 45m
2026-07-08 EZS35WT OPO → GVA Jul 8, 18:40 UTCJul 8, 20:30 UTC1h 50m
2026-07-08 EZS76KB GVA → OPO Jul 8, 15:40 UTCJul 8, 17:35 UTC1h 55m
2026-07-08 EZS47HC - Jul 8, 13:20 UTCJul 8, 14:35 UTC1h 15m
2026-07-08 EZS91DA - Jul 8, 10:55 UTCJul 8, 12:00 UTC1h 5m
2026-07-08 EZS43RY DJE → GVA Jul 8, 07:45 UTCJul 8, 09:50 UTC2h 5m
2026-07-08 EZS14ZV GVA → DJE Jul 8, 04:55 UTCJul 8, 06:55 UTC2h 0m
2026-07-07 EZS35JU - Jul 7, 20:30 UTCJul 7, 21:40 UTC1h 10m
2026-07-07 EZS27FR - Jul 7, 18:40 UTCJul 7, 19:40 UTC1h 0m
2026-07-07 EZS24ZQ - Jul 7, 15:20 UTCJul 7, 17:15 UTC1h 55m
2026-07-07 EZS42WF GVA → OPO Jul 7, 11:40 UTCJul 7, 13:30 UTC1h 50m
2026-07-07 EZS68CN JMK → GVA Jul 7, 07:50 UTCJul 7, 10:35 UTC2h 45m
2026-07-07 EZS73GL GVA → JMK Jul 7, 04:25 UTCJul 7, 06:55 UTC2h 30m
2026-07-06 EJU85PK ALC → GVA Jul 6, 18:35 UTCJul 6, 20:25 UTC1h 50m
2026-07-06 EJU81HV - Jul 6, 15:55 UTCJul 6, 17:35 UTC1h 40m
2026-07-06 EZS45GJ - Jul 6, 13:40 UTCJul 6, 14:40 UTC1h 0m
2026-07-06 EZS49KR - Jul 6, 12:00 UTCJul 6, 12:55 UTC55m
2026-07-06 EZS67AR - Jul 6, 08:30 UTCJul 6, 11:00 UTC2h 30m
2026-07-06 EZS58KB - Jul 6, 04:15 UTCJul 6, 06:50 UTC2h 35m
2026-07-05 EZS72MD OPO → GVA Jul 5, 19:00 UTCJul 5, 20:50 UTC1h 50m
2026-07-05 EZS25QK GVA → OPO Jul 5, 16:25 UTCJul 5, 18:15 UTC1h 50m
2026-07-05 EZS64FU GVA → GVA Jul 5, 05:10 UTCJul 5, 15:15 UTC10h 5m
2026-07-04 EZS76LA GVA → GVA Jul 4, 14:05 UTCJul 4, 20:55 UTC6h 50m

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?
Yes. Mode-S 4B0281 is currently airborne.
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.