Apparatus

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sensors Mode-S transponder

4B1A27

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JXN · AIRBUS A-320

Hex
4B1A27
Octal
22615047
Decimal
4,921,895
Country
CH
Tail
HB-JXN
Type
A320
No current signal · last broadcast Jul 26, 21:45 UTC
Flights observed
622
Distinct callsigns
20
Country
CH
Last broadcast
Jul 26, 21:45 UTC

Last known position

Most recent position reported by Mode-S 4B1A27.

Country allocation

The ICAO 24-bit address 4B1A27 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
EZS43HQ - 11 2026-07-20
EZS34AF Easyjet Switzerland 11 2026-07-20
EZS72YG - 8 2026-07-22
EZS84LU - 7 2026-07-17
EZS58KB Easyjet Switzerland 7 2026-07-25
EZS51BG - 7 2026-07-13
EZS42JW Easyjet Switzerland 7 2026-07-22
EZS72MD Easyjet Switzerland 6 2026-07-23
EZS53VN - 6 2026-07-13
EZS52HV - 6 2026-07-17
EZS25QK Easyjet Switzerland 6 2026-07-23
EZS14LH - 6 2026-07-24
EZS12XR Easyjet Switzerland 6 2026-07-24
EJU91PC - 6 2026-07-09
EJU42GT - 6 2026-07-03
EJU17TF - 6 2026-07-09
EZS82UP - 5 2026-07-04
EZS73RT - 5 2026-07-11
EZS68GV - 5 2026-06-27
EZS46NT - 5 2026-07-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EZS17GH BOD → GVA Jul 26, 21:25 UTCJul 26, 21:45 UTC20m
2026-07-26 EZS63WG GVA → BOD Jul 26, 19:50 UTCJul 26, 20:40 UTC50m
2026-07-26 EZS49JR NCE → GVA Jul 26, 17:50 UTCJul 26, 18:35 UTC45m
2026-07-26 EZS91HZ - Jul 26, 15:35 UTCJul 26, 16:15 UTC40m
2026-07-26 EZS24HA LUX → BER Jul 26, 12:25 UTCJul 26, 14:10 UTC1h 45m
2026-07-26 EZS32QW GVA → BDS Jul 26, 10:00 UTCJul 26, 11:30 UTC1h 30m
2026-07-26 EZS62GR OLB → GVA Jul 26, 08:10 UTCJul 26, 09:05 UTC55m
2026-07-26 EZS91YN - Jul 26, 06:05 UTCJul 26, 06:55 UTC51m
2026-07-25 EZS67AR RAK → GVA Jul 25, 19:15 UTCJul 25, 21:45 UTC2h 30m
2026-07-25 EZS58KB GVA → RAK Jul 25, 15:05 UTCJul 25, 17:50 UTC2h 45m
2026-07-25 EZS47HC SPU → GVA Jul 25, 12:45 UTCJul 25, 13:55 UTC1h 10m
2026-07-25 EZS91DA GVA → SPU Jul 25, 10:20 UTCJul 25, 11:30 UTC1h 10m
2026-07-25 EZS62GR OLB → GVA Jul 25, 07:35 UTCJul 25, 08:40 UTC1h 5m
2026-07-25 EZS91YN - Jul 25, 04:45 UTCJul 25, 05:40 UTC55m
2026-07-24 EZS75JQ - Jul 24, 19:15 UTCJul 24, 20:55 UTC1h 40m
2026-07-24 EZS78KD - Jul 24, 16:35 UTCJul 24, 18:10 UTC1h 35m
2026-07-24 EJU52WT SCQ → GVA Jul 24, 13:40 UTCJul 24, 15:20 UTC1h 40m
2026-07-24 EJU82PN GVA → SCQ Jul 24, 10:50 UTCJul 24, 12:45 UTC1h 55m
2026-07-24 EZS14LH - Jul 24, 07:25 UTCJul 24, 09:25 UTC2h 0m
2026-07-24 EZS12XR GVA → PRN Jul 24, 04:35 UTCJul 24, 06:10 UTC1h 35m
2026-07-23 EZS75KZ TLS → GVA Jul 23, 19:40 UTCJul 23, 20:25 UTC45m
2026-07-23 EZS26DT GVA → TLS Jul 23, 17:55 UTCJul 23, 18:50 UTC55m
2026-07-23 EZS68CN - Jul 23, 13:55 UTCJul 23, 16:50 UTC2h 55m
2026-07-23 EZS73GL GVA → JMK Jul 23, 10:40 UTCJul 23, 13:00 UTC2h 20m
2026-07-23 EZS72MD OPO → GVA Jul 23, 07:20 UTCJul 23, 09:05 UTC1h 45m
2026-07-23 EZS25QK GVA → OPO Jul 23, 04:30 UTCJul 23, 06:30 UTC2h 0m
2026-07-22 EZS75JQ - Jul 22, 19:05 UTCJul 22, 20:55 UTC1h 50m
2026-07-22 EZS78KD - Jul 22, 16:45 UTCJul 22, 18:15 UTC1h 30m
2026-07-22 EZS42JW LGW → GVA Jul 22, 14:25 UTCJul 22, 15:45 UTC1h 20m
2026-07-22 EZS72YG - Jul 22, 11:50 UTCJul 22, 13:05 UTC1h 15m
2026-07-22 EZS16QR - Jul 22, 11:10 UTCJul 22, 11:45 UTC35m
2026-07-21 EZS72EU - Jul 21, 18:15 UTCJul 21, 20:40 UTC2h 25m
2026-07-21 EZS76LA - Jul 21, 13:45 UTCJul 21, 16:40 UTC2h 55m
2026-07-21 EZS16MJ BOD → GVA Jul 21, 11:40 UTCJul 21, 12:40 UTC1h 0m
2026-07-21 EZS25BW GVA → BOD Jul 21, 09:50 UTCJul 21, 10:50 UTC1h 0m
2026-07-21 EZS51JQ LGW → GVA Jul 21, 07:50 UTCJul 21, 09:00 UTC1h 10m
2026-07-21 EZS51PA GVA → LGW Jul 21, 05:00 UTCJul 21, 06:15 UTC1h 15m
2026-07-20 EZS27XP BIO → GVA Jul 20, 19:55 UTCJul 20, 20:55 UTC1h 0m
2026-07-20 EZS59QK GVA → BIO Jul 20, 17:25 UTCJul 20, 18:30 UTC1h 5m
2026-07-20 EZS17GH BOD → GVA Jul 20, 15:20 UTCJul 20, 16:25 UTC1h 5m
2026-07-20 EZS63WG GVA → BOD Jul 20, 13:20 UTCJul 20, 14:30 UTC1h 10m
2026-07-20 EZS34AF OPO → GVA Jul 20, 11:00 UTCJul 20, 12:20 UTC1h 20m
2026-07-20 EZS43HQ GVA → PRG Jul 20, 08:50 UTCJul 20, 10:00 UTC1h 10m
2026-07-20 EZS81ZH TLS → GVA Jul 20, 06:55 UTCJul 20, 07:45 UTC50m
2026-07-20 EZS69UH GVA → TLS Jul 20, 05:05 UTCJul 20, 05:55 UTC50m
2026-07-19 EJU96UW - Jul 19, 19:50 UTCJul 19, 21:10 UTC1h 20m
2026-07-19 EJU73ZQ GVA → PMI Jul 19, 17:15 UTCJul 19, 18:35 UTC1h 20m
2026-07-19 EZS42JW LGW → GVA Jul 19, 15:05 UTCJul 19, 16:15 UTC1h 10m
2026-07-19 EZS72YG GVA → LGW Jul 19, 12:25 UTCJul 19, 13:50 UTC1h 25m
2026-07-19 EZS67AR RAK → GVA Jul 19, 08:10 UTCJul 19, 10:40 UTC2h 30m

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

Mode-S 4B1A27 frequently asked

What is Mode-S code 4B1A27?
4B1A27 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JXN.
Where is Mode-S 4B1A27 registered?
Mode-S code 4B1A27 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A27 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1A27, octal 22615047, decimal 4,921,895.
What flights does 4B1A27 operate?
Mode-S 4B1A27 has broadcast 20 distinct callsigns, including EZS43HQ, EZS34AF, EZS72YG, EZS84LU, EZS58KB.