Apparatus

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sensors Mode-S transponder

4B1A1F

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JXF · AIRBUS A-320

Hex
4B1A1F
Octal
22615037
Decimal
4,921,887
Country
CH
Tail
HB-JXF
Type
A320
No current signal · last broadcast 4h ago
Flights observed
253
Distinct callsigns
20
Country
CH
Last broadcast
4h ago

Last known position

Most recent position reported by Mode-S 4B1A1F.

Country allocation

The ICAO 24-bit address 4B1A1F 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
EZS16QR - 8 2026-05-29
EZS62KF Easyjet Switzerland 7 2026-05-29
EZS45BC Easyjet Switzerland 5 2026-05-05
EZS35WT Easyjet Switzerland 5 2026-04-29
EZS83LF Easyjet Switzerland 4 2026-05-11
EZS76KB Easyjet Switzerland 4 2026-04-29
EZS74RG Easyjet Switzerland 4 2026-05-25
EZS45RN Easyjet Switzerland 4 2026-05-23
EZS45PQ - 4 2026-05-02
EJU43TE easyJet Europe 4 2026-05-18
EJU31MY easyJet Europe 4 2026-05-19
EJU16RK easyJet Europe 4 2026-05-19
EZS86ZE Easyjet Switzerland 3 2026-04-16
EZS86XB Easyjet Switzerland 3 2026-05-21
EZS81ZB Easyjet Switzerland 3 2026-05-11
EZS81DV - 3 2026-05-23
EZS81AP Easyjet Switzerland 3 2026-05-18
EZS79KV Easyjet Switzerland 3 2026-05-27
EZS79ER - 3 2026-05-18
EZS75LA - 3 2026-05-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 EZS16QR EDI → GVA May 29, 18:45 UTCMay 29, 20:40 UTC1h 55m
2026-05-29 EZS62KF GVA → EDI May 29, 15:50 UTCMay 29, 17:55 UTC2h 5m
2026-05-29 EZS34AF OPO → GVA May 29, 13:30 UTCMay 29, 14:50 UTC1h 20m
2026-05-29 EZS43HQ GVA → PRG May 29, 11:20 UTCMay 29, 12:35 UTC1h 15m
2026-05-29 EZS14LH - May 29, 07:35 UTCMay 29, 09:15 UTC1h 40m
2026-05-29 EZS12XR GVA → PRN May 29, 04:35 UTCMay 29, 06:15 UTC1h 40m
2026-05-28 EJU95FD ALC → GVA May 28, 07:05 UTCMay 28, 08:50 UTC1h 45m
2026-05-28 EJU53LX GVA → ALC May 28, 04:10 UTCMay 28, 05:55 UTC1h 45m
2026-05-27 EZS35JU NTE → GVA May 27, 19:35 UTCMay 27, 20:30 UTC55m
2026-05-27 EZS27FR GVA → NTE May 27, 17:45 UTCMay 27, 18:45 UTC1h 0m
2026-05-27 EZS89PM FCO → GVA May 27, 15:45 UTCMay 27, 16:50 UTC1h 5m
2026-05-27 EZS61HE GVA → FCO May 27, 13:30 UTCMay 27, 14:40 UTC1h 10m
2026-05-27 EZS79KV VCE → GVA May 27, 11:40 UTCMay 27, 12:35 UTC55m
2026-05-27 EZS63KJ - May 27, 09:50 UTCMay 27, 10:40 UTC50m
2026-05-27 EZS58CH MAN → GVA May 27, 07:05 UTCMay 27, 08:45 UTC1h 40m
2026-05-27 EZS57TY GVA → MAN May 27, 04:14 UTCMay 27, 05:49 UTC1h 35m
2026-05-26 EZS59MQ LGW → GVA May 26, 19:30 UTCMay 26, 20:45 UTC1h 15m
2026-05-26 EZS23YH GVA → LGW May 26, 17:20 UTCMay 26, 18:30 UTC1h 10m
2026-05-26 EZS24DN LIS → GVA May 26, 14:09 UTCMay 26, 16:24 UTC2h 15m
2026-05-26 EZS1465 GVA → LIS May 26, 10:39 UTCMay 26, 13:04 UTC2h 25m
2026-05-26 EZS72MD OPO → GVA May 26, 07:24 UTCMay 26, 09:19 UTC1h 55m
2026-05-26 EZS25QK GVA → OPO May 26, 04:30 UTCMay 26, 06:29 UTC2h 0m
2026-05-25 EZS59MQ LGW → GVA May 25, 19:40 UTCMay 25, 20:45 UTC1h 5m
2026-05-25 EZS23YH GVA → LGW May 25, 17:30 UTCMay 25, 18:35 UTC1h 5m
2026-05-25 EZS54RD OPO → GVA May 25, 14:30 UTCMay 25, 16:25 UTC1h 55m
2026-05-25 EZS74RG GVA → OPO May 25, 11:00 UTCMay 25, 12:55 UTC1h 55m
2026-05-25 EZS19BN BEG → GVA May 25, 07:55 UTCMay 25, 09:35 UTC1h 40m
2026-05-25 EZS75LA GVA → BEG May 25, 05:10 UTCMay 25, 06:55 UTC1h 45m
2026-05-24 EZS9470 FNC → GVA May 24, 14:20 UTCMay 24, 16:45 UTC2h 25m
2026-05-24 EZS9470 FNC → GVA May 24, 13:30 UTCMay 24, 13:40 UTC10m
2026-05-23 EZS1469 GVA → CPH May 23, 19:30 UTCMay 23, 21:05 UTC1h 35m
2026-05-23 EZS45RN GVA → FNC May 23, 16:15 UTCMay 23, 18:00 UTC1h 45m
2026-05-23 EZS45RN GVA → FNC May 23, 13:10 UTCMay 23, 15:35 UTC2h 25m
2026-05-23 EZS81DV GVA → GVA May 23, 07:10 UTCMay 23, 11:45 UTC4h 35m
2026-05-23 EZS9071 GVA → LPA May 23, 05:55 UTCMay 23, 06:10 UTC15m
2026-05-22 EZS16QR EDI → LYS May 22, 21:45 UTCMay 22, 23:40 UTC1h 55m
2026-05-22 EZS16QR EDI → EDI May 22, 19:00 UTCMay 22, 20:00 UTC1h 0m
2026-05-22 EZS62KF GVA → EDI May 22, 16:05 UTCMay 22, 18:00 UTC1h 55m
2026-05-22 EZS51JQ LGW → GVA May 22, 10:20 UTCMay 22, 11:35 UTC1h 15m
2026-05-22 EZS91ZE GVA → LGW May 22, 08:05 UTCMay 22, 09:20 UTC1h 15m
2026-05-22 EZS81ZH TLS → GVA May 22, 06:15 UTCMay 22, 07:00 UTC45m
2026-05-22 EZS69UH GVA → TLS May 22, 04:30 UTCMay 22, 05:25 UTC55m
2026-05-21 EZS52CP HER → GVA May 21, 18:10 UTCMay 21, 20:50 UTC2h 40m
2026-05-21 EZS86XB GVA → HER May 21, 14:20 UTCMay 21, 16:55 UTC2h 35m
2026-05-21 EJU87RL IBZ → GVA May 21, 11:20 UTCMay 21, 12:55 UTC1h 35m
2026-05-21 EJU85KQ OPO → BSL May 21, 09:05 UTCMay 21, 10:30 UTC1h 25m
2026-05-21 EZS16MJ BOD → GVA May 21, 07:00 UTCMay 21, 07:55 UTC55m
2026-05-21 EZS25BW GVA → BOD May 21, 05:15 UTCMay 21, 06:15 UTC1h 0m
2026-05-20 EZS75JQ BDS → GVA May 20, 18:50 UTCMay 20, 20:35 UTC1h 45m
2026-05-20 EZS78KD - May 20, 16:20 UTCMay 20, 17:55 UTC1h 35m

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

Mode-S 4B1A1F frequently asked

What is Mode-S code 4B1A1F?
4B1A1F is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JXF.
Where is Mode-S 4B1A1F registered?
Mode-S code 4B1A1F is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A1F broadcasting right now?
No active broadcast right now. Last signal was 4h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1A1F, octal 22615037, decimal 4,921,887.
What flights does 4B1A1F operate?
Mode-S 4B1A1F has broadcast 20 distinct callsigns, including EZS16QR, EZS62KF, EZS45BC, EZS35WT, EZS83LF.