Apparatus

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sensors Mode-S transponder

4B1A24

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JXK · AIRBUS A-320

Hex
4B1A24
Octal
22615044
Decimal
4,921,892
Country
CH
Tail
HB-JXK
Type
A320
No current signal · last broadcast 59m ago
Flights observed
536
Distinct callsigns
20
Country
CH
Last broadcast
59m ago

Last known position

Most recent position reported by Mode-S 4B1A24.

Country allocation

The ICAO 24-bit address 4B1A24 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
EZS72MD - 8 2026-07-07
EZS25QK - 8 2026-07-07
EZS78GR - 6 2026-07-13
EZS72YG Easyjet Switzerland 6 2026-06-10
EZS71RV - 6 2026-07-13
EZS59XA - 6 2026-07-13
EZS37UG - 6 2026-07-12
EZS14EZ - 6 2026-07-13
EZS91YN - 5 2026-07-13
EZS91PX Easyjet Switzerland 5 2026-05-27
EZS82EN - 5 2026-07-10
EZS81ZH - 5 2026-07-08
EZS79YP - 5 2026-07-14
EZS69UH - 5 2026-07-08
EZS63BD - 5 2026-07-14
EZS62HY - 5 2026-07-11
EZS62GR - 5 2026-07-13
EZS58KB - 5 2026-07-12
EZS48AX - 5 2026-07-11
EZS42WF - 5 2026-07-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 EZS1449 - Jul 15, 05:50 UTCJul 15, 07:00 UTC1h 10m
2026-07-14 EZS52CP - Jul 14, 15:30 UTCJul 14, 18:20 UTC2h 50m
2026-07-14 EZS86XB - Jul 14, 11:45 UTCJul 14, 14:10 UTC2h 25m
2026-07-14 EZS63BD LIS → GVA Jul 14, 08:45 UTCJul 14, 10:45 UTC2h 0m
2026-07-14 EZS79YP GVA → LIS Jul 14, 05:00 UTCJul 14, 07:25 UTC2h 25m
2026-07-13 EZS78GR VLC → GVA Jul 13, 19:55 UTCJul 13, 21:25 UTC1h 30m
2026-07-13 EZS14EZ GVA → VLC Jul 13, 17:15 UTCJul 13, 18:45 UTC1h 30m
2026-07-13 EZS62GR OLB → GVA Jul 13, 15:10 UTCJul 13, 16:15 UTC1h 5m
2026-07-13 EZS91YN - Jul 13, 12:55 UTCJul 13, 14:00 UTC1h 5m
2026-07-13 EZS41BX - Jul 13, 10:30 UTCJul 13, 11:55 UTC1h 25m
2026-07-13 EZS1571 GVA → BHX Jul 13, 08:10 UTCJul 13, 09:35 UTC1h 25m
2026-07-13 EZS59XA - Jul 13, 06:35 UTCJul 13, 07:15 UTC40m
2026-07-13 EZS71RV GVA → NCE Jul 13, 05:01 UTCJul 13, 05:45 UTC45m
2026-07-12 EZS1510 - Jul 12, 19:20 UTCJul 12, 20:35 UTC1h 15m
2026-07-12 EZS1509 - Jul 12, 16:50 UTCJul 12, 17:55 UTC1h 5m
2026-07-12 EZS37UG AMS → GVA Jul 12, 14:45 UTCJul 12, 15:50 UTC1h 5m
2026-07-12 EZS1517 - Jul 12, 12:10 UTCJul 12, 13:20 UTC1h 10m
2026-07-12 EZS58KB GVA → GVA Jul 12, 04:15 UTCJul 12, 11:05 UTC6h 50m
2026-07-11 EZS35WT OPO → GVA Jul 11, 20:25 UTCJul 11, 22:10 UTC1h 45m
2026-07-11 EZS76KB GVA → OPO Jul 11, 17:35 UTCJul 11, 19:35 UTC2h 0m
2026-07-11 EZS98NZ MAH → GVA Jul 11, 14:30 UTCJul 11, 15:40 UTC1h 10m
2026-07-11 EZS81FQ - Jul 11, 10:40 UTCJul 11, 11:45 UTC1h 5m
2026-07-11 EZS48AX - Jul 11, 07:45 UTCJul 11, 09:30 UTC1h 45m
2026-07-11 EZS62HY - Jul 11, 04:55 UTCJul 11, 06:30 UTC1h 35m
2026-07-10 EZS36FD PMO → GVA Jul 10, 12:10 UTCJul 10, 13:45 UTC1h 35m
2026-07-10 EZS82EN - Jul 10, 09:35 UTCJul 10, 11:10 UTC1h 35m
2026-07-10 EZS62GR - Jul 10, 07:30 UTCJul 10, 08:30 UTC1h 0m
2026-07-10 EZS91YN - Jul 10, 04:30 UTCJul 10, 05:40 UTC1h 10m
2026-07-09 EZS81AP OLB → GVA Jul 9, 20:00 UTCJul 9, 21:15 UTC1h 15m
2026-07-09 EZS79ER GVA → OLB Jul 9, 17:50 UTCJul 9, 19:05 UTC1h 15m
2026-07-09 EZS49JR NCE → GVA Jul 9, 16:10 UTCJul 9, 16:50 UTC40m
2026-07-09 EZS91HZ GVA → NCE Jul 9, 14:25 UTCJul 9, 15:10 UTC45m
2026-07-09 EZS62GR OLB → GVA Jul 9, 11:55 UTCJul 9, 12:55 UTC1h 0m
2026-07-09 EZS91YN - Jul 9, 09:40 UTCJul 9, 10:45 UTC1h 5m
2026-07-09 EZS48AX - Jul 9, 06:55 UTCJul 9, 08:45 UTC1h 50m
2026-07-09 EZS62HY - Jul 9, 04:10 UTCJul 9, 05:50 UTC1h 40m
2026-07-08 EZS81ZH TLS → GVA Jul 8, 19:35 UTCJul 8, 20:25 UTC50m
2026-07-08 EZS69UH GVA → TLS Jul 8, 17:55 UTCJul 8, 18:45 UTC50m
2026-07-08 EZS43AP TIV → GVA Jul 8, 15:00 UTCJul 8, 16:40 UTC1h 40m
2026-07-08 EZS48KU GVA → TIV Jul 8, 12:15 UTCJul 8, 13:40 UTC1h 25m
2026-07-08 EZS31QP ATH → GVA Jul 8, 08:30 UTCJul 8, 11:05 UTC2h 35m
2026-07-08 EZS49KC GVA → ATH Jul 8, 04:40 UTCJul 8, 07:00 UTC2h 20m
2026-07-07 EJU79CA IBZ → GVA Jul 7, 20:00 UTCJul 7, 21:40 UTC1h 40m
2026-07-07 EJU85QE GVA → IBZ Jul 7, 17:40 UTCJul 7, 18:55 UTC1h 15m
2026-07-07 EZS24DN LIS → GVA Jul 7, 14:45 UTCJul 7, 16:45 UTC2h 0m
2026-07-07 EZS1465 GVA → LIS Jul 7, 10:30 UTCJul 7, 12:45 UTC2h 15m
2026-07-07 EZS72MD OPO → GVA Jul 7, 07:15 UTCJul 7, 09:10 UTC1h 55m
2026-07-07 EZS25QK GVA → OPO Jul 7, 04:20 UTCJul 7, 06:15 UTC1h 55m
2026-07-06 EZS54RD OPO → GVA Jul 6, 15:10 UTCJul 6, 17:00 UTC1h 50m
2026-07-06 EZS74RG GVA → OPO Jul 6, 11:50 UTCJul 6, 13:50 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 HB-JXK page for operator, model, and routing details .

Mode-S 4B1A24 frequently asked

What is Mode-S code 4B1A24?
4B1A24 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JXK.
Where is Mode-S 4B1A24 registered?
Mode-S code 4B1A24 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A24 broadcasting right now?
No active broadcast right now. Last signal was 59m ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1A24, octal 22615044, decimal 4,921,892.
What flights does 4B1A24 operate?
Mode-S 4B1A24 has broadcast 20 distinct callsigns, including EZS72MD, EZS25QK, EZS78GR, EZS72YG, EZS71RV.