Apparatus

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sensors Mode-S transponder

4B1A2B

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JXR · AIRBUS A-320

Hex
4B1A2B
Octal
22615053
Decimal
4,921,899
Country
CH
Tail
HB-JXR
Type
A320
No current signal · last broadcast 3h ago
Flights observed
522
Distinct callsigns
20
Country
CH
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 4B1A2B.

Country allocation

The ICAO 24-bit address 4B1A2B 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
EZS49JR Easyjet Switzerland 9 2026-06-11
EZS72YG - 8 2026-07-12
EJU42GT - 8 2026-06-24
EZS78GR Easyjet Switzerland 7 2026-06-23
EZS62KF - 7 2026-07-10
EZS42JW Easyjet Switzerland 7 2026-07-12
EZS16QR - 7 2026-07-10
EZS14EZ - 7 2026-06-23
EJU43TE - 7 2026-06-24
EZS94ZT Easyjet Switzerland 6 2026-06-05
EZS91HZ Easyjet Switzerland 6 2026-06-11
EZS81AP Easyjet Switzerland 6 2026-06-24
EZS62TJ - 6 2026-06-24
EZS58KB Easyjet Switzerland 6 2026-05-30
EZS41MA - 6 2026-06-24
EZS91PX - 5 2026-07-03
EZS79ER - 5 2026-06-24
EZS62HY Easyjet Switzerland 5 2026-06-11
EZS57JY Easyjet Switzerland 5 2026-06-05
EZS51PA - 5 2026-07-11

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 EZS59MQ LGW → GVA Jul 13, 20:25 UTCJul 13, 21:30 UTC1h 5m
2026-07-13 EZS23YH - Jul 13, 18:05 UTCJul 13, 19:25 UTC1h 20m
2026-07-13 EZS51WA - Jul 13, 16:15 UTCJul 13, 17:10 UTC55m
2026-07-13 EZS96XV - Jul 13, 14:35 UTCJul 13, 15:25 UTC50m
2026-07-13 EZS1362 - Jul 13, 12:25 UTCJul 13, 13:25 UTC1h 0m
2026-07-13 EZS78JM - Jul 13, 10:15 UTCJul 13, 11:20 UTC1h 5m
2026-07-13 EZS43MP BRU → GVA Jul 13, 07:50 UTCJul 13, 08:45 UTC55m
2026-07-13 EZS1527 GVA → BRU Jul 13, 05:45 UTCJul 13, 06:50 UTC1h 5m
2026-07-12 EZS59MQ LGW → GVA Jul 12, 20:50 UTCJul 12, 21:55 UTC1h 5m
2026-07-12 EZS23YH GVA → LGW Jul 12, 18:35 UTCJul 12, 19:45 UTC1h 10m
2026-07-12 EZS42JW LGW → GVA Jul 12, 16:30 UTCJul 12, 17:30 UTC1h 0m
2026-07-12 EZS72YG GVA → LGW Jul 12, 13:45 UTCJul 12, 15:05 UTC1h 20m
2026-07-12 EZS73NK - Jul 12, 10:40 UTCJul 12, 12:30 UTC1h 50m
2026-07-12 EZS31WH - Jul 12, 07:50 UTCJul 12, 09:25 UTC1h 35m
2026-07-11 EZS25WG MLA → GVA Jul 11, 19:20 UTCJul 11, 21:20 UTC2h 0m
2026-07-11 EZS1573 GVA → MLA Jul 11, 16:35 UTCJul 11, 18:25 UTC1h 50m
2026-07-11 EZS48YR - Jul 11, 13:45 UTCJul 11, 15:30 UTC1h 45m
2026-07-11 EZS87GD - Jul 11, 11:00 UTCJul 11, 12:30 UTC1h 30m
2026-07-11 EZS51JQ - Jul 11, 07:45 UTCJul 11, 08:50 UTC1h 5m
2026-07-11 EZS51PA GVA → LGW Jul 11, 05:25 UTCJul 11, 06:35 UTC1h 10m
2026-07-10 EZS16QR EDI → GVA Jul 10, 20:40 UTCJul 10, 22:25 UTC1h 45m
2026-07-10 EZS62KF - Jul 10, 18:05 UTCJul 10, 19:50 UTC1h 45m
2026-07-10 EZS34AF PRG → GVA Jul 10, 15:15 UTCJul 10, 16:35 UTC1h 20m
2026-07-10 EZS43HQ GVA → PRG Jul 10, 12:45 UTCJul 10, 14:00 UTC1h 15m
2026-07-10 EZS58CH - Jul 10, 10:05 UTCJul 10, 11:35 UTC1h 30m
2026-07-10 EZS57TY GVA → MAN Jul 10, 06:20 UTCJul 10, 08:05 UTC1h 45m
2026-07-09 EZS35WT OPO → GVA Jul 9, 18:20 UTCJul 9, 20:10 UTC1h 50m
2026-07-09 EZS76KB GVA → OPO Jul 9, 15:35 UTCJul 9, 17:25 UTC1h 50m
2026-07-09 EJU31MY GVA → GVA Jul 9, 05:00 UTCJul 9, 13:20 UTC8h 20m
2026-07-08 EJU84VV AGP → GVA Jul 8, 18:25 UTCJul 8, 20:20 UTC1h 55m
2026-07-08 EJU76QC NAP → MXP Jul 8, 15:15 UTCJul 8, 17:15 UTC2h 0m
2026-07-08 EZS62GR OLB → GVA Jul 8, 12:45 UTCJul 8, 13:50 UTC1h 5m
2026-07-08 EZS91YN - Jul 8, 10:20 UTCJul 8, 11:30 UTC1h 10m
2026-07-07 EZS52CP - Jul 7, 15:25 UTCJul 7, 18:15 UTC2h 50m
2026-07-07 EZS86XB - Jul 7, 11:25 UTCJul 7, 13:50 UTC2h 25m
2026-07-07 EZS63BD LIS → GVA Jul 7, 08:20 UTCJul 7, 10:25 UTC2h 5m
2026-07-07 EZS79YP GVA → LIS Jul 7, 04:50 UTCJul 7, 07:00 UTC2h 10m
2026-07-06 EZS82CH BRI → GVA Jul 6, 19:10 UTCJul 6, 20:50 UTC1h 40m
2026-07-06 EZS37HP GVA → BRI Jul 6, 16:50 UTCJul 6, 18:20 UTC1h 30m
2026-07-06 EJU52WT - Jul 6, 14:10 UTCJul 6, 16:00 UTC1h 50m
2026-07-06 EJU82PN GVA → SCQ Jul 6, 11:30 UTCJul 6, 13:20 UTC1h 50m
2026-07-06 EZS72MD OPO → GVA Jul 6, 08:30 UTCJul 6, 10:25 UTC1h 55m
2026-07-06 EZS25QK GVA → OPO Jul 6, 05:20 UTCJul 6, 07:20 UTC2h 0m
2026-07-05 EZS18GT BUD → GVA Jul 5, 19:00 UTCJul 5, 20:40 UTC1h 40m
2026-07-05 EZS83JY GVA → BUD Jul 5, 16:45 UTCJul 5, 18:10 UTC1h 25m
2026-07-05 EZS54RD OPO → GVA Jul 5, 13:40 UTCJul 5, 15:30 UTC1h 50m
2026-07-05 EZS74RG GVA → OPO Jul 5, 10:40 UTCJul 5, 12:35 UTC1h 55m
2026-07-05 EJU17TF SVQ → GVA Jul 5, 07:15 UTCJul 5, 09:15 UTC2h 0m
2026-07-05 EJU91PC GVA → SVQ Jul 5, 04:25 UTCJul 5, 06:25 UTC2h 0m
2026-07-04 EZS1506 AQJ → GVA Jul 4, 13:10 UTCJul 4, 14:55 UTC1h 45m

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

Mode-S 4B1A2B frequently asked

What is Mode-S code 4B1A2B?
4B1A2B is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JXR.
Where is Mode-S 4B1A2B registered?
Mode-S code 4B1A2B is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A2B broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1A2B, octal 22615053, decimal 4,921,899.
What flights does 4B1A2B operate?
Mode-S 4B1A2B has broadcast 20 distinct callsigns, including EZS49JR, EZS72YG, EJU42GT, EZS78GR, EZS62KF.