Apparatus

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sensors Mode-S transponder

4B1A1B

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JXB · AIRBUS A-320

Hex
4B1A1B
Octal
22615033
Decimal
4,921,883
Country
CH
Tail
HB-JXB
Type
A320
No current signal · last broadcast Jul 26, 17:55 UTC
Flights observed
542
Distinct callsigns
20
Country
CH
Last broadcast
Jul 26, 17:55 UTC

Last known position

Most recent position reported by Mode-S 4B1A1B.

Country allocation

The ICAO 24-bit address 4B1A1B 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
EJU85QE - 8 2026-07-11
EJU79CA - 8 2026-07-11
EZS63WG Easyjet Switzerland 7 2026-07-24
EZS62HY - 7 2026-07-16
EZS31QP - 7 2026-07-21
EZS17GH Easyjet Switzerland 7 2026-07-24
EZS91YN - 6 2026-07-18
EZS72YG - 6 2026-07-11
EZS62GR - 6 2026-07-18
EZS59MN - 6 2026-07-19
EZS48AX - 6 2026-07-16
EZS1395 Easyjet Switzerland 6 2026-07-19
EZS91DA - 5 2026-07-18
EZS79YP - 5 2026-07-05
EZS75KZ Easyjet Switzerland 5 2026-06-16
EZS63BD - 5 2026-07-05
EZS51JQ - 5 2026-07-17
EZS47HC - 5 2026-07-18
EZS42JW Easyjet Switzerland 5 2026-07-02
EZS26DT Easyjet Switzerland 5 2026-06-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EJU84VV AGP → GVA Jul 26, 15:45 UTCJul 26, 17:50 UTC2h 5m
2026-07-26 EJU76QC NAP → MXP Jul 26, 12:05 UTCJul 26, 14:10 UTC2h 5m
2026-07-26 EZS36FD PMO → GVA Jul 26, 08:40 UTCJul 26, 10:10 UTC1h 30m
2026-07-26 EZS82EN GVA → PMO Jul 26, 05:25 UTCJul 26, 06:45 UTC1h 21m
2026-07-25 EZS52CP HER → GVA Jul 25, 18:50 UTCJul 25, 21:50 UTC3h 0m
2026-07-25 EZS86XB GVA → HER Jul 25, 15:00 UTCJul 25, 17:20 UTC2h 20m
2026-07-25 EZS41MA NTE → GVA Jul 25, 12:30 UTCJul 25, 13:30 UTC1h 0m
2026-07-25 EZS62TJ GVA → NTE Jul 25, 10:40 UTCJul 25, 11:35 UTC55m
2026-07-25 EJU95FD ALC → GVA Jul 25, 07:40 UTCJul 25, 09:15 UTC1h 35m
2026-07-25 EJU95FD ALC → GVA Jul 25, 07:20 UTCJul 25, 07:25 UTC5m
2026-07-25 EJU53LX GVA → ALC Jul 25, 04:15 UTCJul 25, 06:00 UTC1h 45m
2026-07-24 EZS17GH BOD → GVA Jul 24, 20:25 UTCJul 24, 21:20 UTC55m
2026-07-24 EZS63WG GVA → BOD Jul 24, 18:05 UTCJul 24, 19:00 UTC55m
2026-07-23 EZS9566 BUD → GVA Jul 23, 19:10 UTCJul 23, 20:40 UTC1h 30m
2026-07-22 EZS83JY GVA → BUD Jul 22, 12:00 UTCJul 22, 13:35 UTC1h 35m
2026-07-22 EZS1397 GVA → NCE Jul 22, 04:15 UTCJul 22, 05:00 UTC45m
2026-07-21 EZS35WT OPO → GVA Jul 21, 19:00 UTCJul 21, 20:40 UTC1h 40m
2026-07-21 EZS76KB GVA → OPO Jul 21, 16:05 UTCJul 21, 18:05 UTC2h 0m
2026-07-21 EZS81AP OLB → GVA Jul 21, 13:55 UTCJul 21, 15:10 UTC1h 15m
2026-07-21 EZS79ER GVA → OLB Jul 21, 11:45 UTCJul 21, 12:50 UTC1h 5m
2026-07-21 EZS31QP ATH → GVA Jul 21, 07:55 UTCJul 21, 10:45 UTC2h 50m
2026-07-21 EZS49KC GVA → ATH Jul 21, 04:30 UTCJul 21, 06:45 UTC2h 15m
2026-07-20 EJU52WT - Jul 20, 19:50 UTCJul 20, 21:20 UTC1h 30m
2026-07-20 EJU82PN - Jul 20, 17:00 UTCJul 20, 18:50 UTC1h 50m
2026-07-20 EZS72MD OPO → GVA Jul 20, 07:45 UTCJul 20, 09:25 UTC1h 40m
2026-07-20 EZS25QK GVA → OPO Jul 20, 04:50 UTCJul 20, 06:55 UTC2h 5m
2026-07-19 EZS75JQ - Jul 19, 17:10 UTCJul 19, 19:00 UTC1h 50m
2026-07-19 EZS78KD GVA → BDS Jul 19, 14:30 UTCJul 19, 16:05 UTC1h 35m
2026-07-19 EZS59MN - Jul 19, 12:25 UTCJul 19, 13:00 UTC35m
2026-07-19 EZS1395 GVA → NCE Jul 19, 10:25 UTCJul 19, 11:15 UTC50m
2026-07-19 EJU52WT - Jul 19, 06:55 UTCJul 19, 08:45 UTC1h 50m
2026-07-19 EJU82PN - Jul 19, 04:10 UTCJul 19, 06:00 UTC1h 50m
2026-07-18 EZS67AR - Jul 18, 18:40 UTCJul 18, 21:15 UTC2h 35m
2026-07-18 EZS58KB - Jul 18, 14:30 UTCJul 18, 17:00 UTC2h 30m
2026-07-18 EZS47HC - Jul 18, 12:10 UTCJul 18, 13:25 UTC1h 15m
2026-07-18 EZS91DA - Jul 18, 09:50 UTCJul 18, 10:55 UTC1h 5m
2026-07-18 EZS62GR - Jul 18, 07:35 UTCJul 18, 08:55 UTC1h 20m
2026-07-18 EZS91YN - Jul 18, 05:10 UTCJul 18, 06:10 UTC1h 0m
2026-07-17 EZS35JU - Jul 17, 20:15 UTCJul 17, 21:15 UTC1h 0m
2026-07-17 EZS27FR - Jul 17, 18:25 UTCJul 17, 19:25 UTC1h 0m
2026-07-17 EJU43TE BCN → GVA Jul 17, 16:10 UTCJul 17, 17:15 UTC1h 5m
2026-07-17 EJU42GT - Jul 17, 14:04 UTCJul 17, 15:10 UTC1h 5m
2026-07-17 EZS59MN NCE → GVA Jul 17, 12:19 UTCJul 17, 13:05 UTC45m
2026-07-17 EZS1395 - Jul 17, 10:15 UTCJul 17, 10:55 UTC40m
2026-07-17 EZS51JQ LGW → GVA Jul 17, 08:04 UTCJul 17, 09:20 UTC1h 15m
2026-07-17 EZS51PA - Jul 17, 05:15 UTCJul 17, 06:29 UTC1h 15m
2026-07-16 EZS67AR - Jul 16, 18:15 UTCJul 16, 20:49 UTC2h 35m
2026-07-16 EZS58KB - Jul 16, 14:20 UTCJul 16, 16:55 UTC2h 35m
2026-07-16 EZS62GR OLB → GVA Jul 16, 12:00 UTCJul 16, 13:05 UTC1h 5m
2026-07-16 EZS91YN - Jul 16, 09:45 UTCJul 16, 10:59 UTC1h 15m

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

Mode-S 4B1A1B frequently asked

What is Mode-S code 4B1A1B?
4B1A1B is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JXB.
Where is Mode-S 4B1A1B registered?
Mode-S code 4B1A1B is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A1B broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 17:55 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1A1B, octal 22615033, decimal 4,921,883.
What flights does 4B1A1B operate?
Mode-S 4B1A1B has broadcast 20 distinct callsigns, including EJU85QE, EJU79CA, EZS63WG, EZS62HY, EZS31QP.