Apparatus

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sensors Mode-S transponder

4B1A65

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JZX · AIRBUS A-320

Hex
4B1A65
Octal
22615145
Decimal
4,921,957
Country
CH
Tail
HB-JZX
Type
A320
No current signal · last broadcast 6h ago
Flights observed
541
Distinct callsigns
20
Country
CH
Last broadcast
6h ago

Last known position

Most recent position reported by Mode-S 4B1A65.

Country allocation

The ICAO 24-bit address 4B1A65 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
EZS78KD - 8 2026-07-03
EZS64DZ Easyjet Switzerland 7 2026-06-21
EZS62HY Easyjet Switzerland 7 2026-05-19
EZS52NT Easyjet Switzerland 7 2026-06-21
EZS48AX - 7 2026-05-19
EZS14LH - 7 2026-06-28
EZS12XR - 7 2026-06-28
EZS75JQ - 6 2026-07-03
EJU85HR easyJet Europe 6 2026-06-17
EJU85DP easyJet Europe 6 2026-06-17
EZS58KB - 5 2026-07-11
EZS51JQ - 5 2026-07-07
EJU53LX - 5 2026-07-09
EZS81ZH - 4 2026-07-13
EZS78GR - 4 2026-07-12
EZS73TU Easyjet Switzerland 4 2026-06-24
EZS72ZY Easyjet Switzerland 4 2026-06-20
EZS69UH - 4 2026-07-13
EZS68GV Easyjet Switzerland 4 2026-05-22
EZS548Q Easyjet Switzerland 4 2026-06-17

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 EZS73RT - Jul 14, 19:10 UTCJul 14, 20:55 UTC1h 45m
2026-07-14 EZS19WQ - Jul 14, 16:20 UTCJul 14, 17:50 UTC1h 30m
2026-07-14 EZS36FD PMO → GVA Jul 14, 13:15 UTCJul 14, 15:00 UTC1h 45m
2026-07-14 EZS82EN - Jul 14, 10:40 UTCJul 14, 12:10 UTC1h 30m
2026-07-14 EZS1534 - Jul 14, 08:25 UTCJul 14, 09:35 UTC1h 10m
2026-07-14 EZS1533 - Jul 14, 05:50 UTCJul 14, 07:00 UTC1h 10m
2026-07-13 EZS27XP - Jul 13, 19:35 UTCJul 13, 20:45 UTC1h 10m
2026-07-13 EZS59QK - Jul 13, 17:20 UTCJul 13, 18:30 UTC1h 10m
2026-07-13 EZS17GH BOD → GVA Jul 13, 15:20 UTCJul 13, 16:20 UTC1h 0m
2026-07-13 EZS63WG - Jul 13, 13:30 UTCJul 13, 14:25 UTC55m
2026-07-13 EZS34AF PRG → GVA Jul 13, 11:15 UTCJul 13, 12:30 UTC1h 15m
2026-07-13 EZS43HQ - Jul 13, 09:20 UTCJul 13, 10:25 UTC1h 5m
2026-07-13 EZS81ZH - Jul 13, 07:20 UTCJul 13, 08:01 UTC40m
2026-07-13 EZS69UH GVA → TLS Jul 13, 05:31 UTCJul 13, 06:25 UTC55m
2026-07-12 EZS78GR VLC → GVA Jul 12, 19:55 UTCJul 12, 21:25 UTC1h 30m
2026-07-12 EZS14EZ GVA → VLC Jul 12, 16:45 UTCJul 12, 18:30 UTC1h 45m
2026-07-12 EJU87RL IBZ → GVA Jul 12, 14:20 UTCJul 12, 15:45 UTC1h 25m
2026-07-12 EJU85KQ GVA → IBZ Jul 12, 11:40 UTCJul 12, 13:10 UTC1h 30m
2026-07-12 EZS13BL - Jul 12, 08:25 UTCJul 12, 10:30 UTC2h 5m
2026-07-12 EZS58WL - Jul 12, 04:50 UTCJul 12, 07:15 UTC2h 25m
2026-07-11 EZS58KB GVA → GVA Jul 11, 15:25 UTCJul 11, 21:40 UTC6h 15m
2026-07-11 EZS27QG - Jul 11, 13:10 UTCJul 11, 14:30 UTC1h 20m
2026-07-11 EZS29UW - Jul 11, 11:20 UTCJul 11, 12:15 UTC55m
2026-07-11 EZS81DV NBE → GVA Jul 11, 08:35 UTCJul 11, 10:20 UTC1h 45m
2026-07-11 EZS12DC GVA → NBE Jul 11, 04:40 UTCJul 11, 06:25 UTC1h 45m
2026-07-10 EZS81ZH TLS → GVA Jul 10, 16:55 UTCJul 10, 17:45 UTC50m
2026-07-10 EZS69UH GVA → TLS Jul 10, 15:10 UTCJul 10, 16:05 UTC55m
2026-07-10 EZS83TQ CAG → GVA Jul 10, 11:45 UTCJul 10, 13:00 UTC1h 15m
2026-07-10 EZS58ZV - Jul 10, 09:15 UTCJul 10, 10:35 UTC1h 20m
2026-07-10 EJU87RL IBZ → GVA Jul 10, 06:45 UTCJul 10, 08:15 UTC1h 30m
2026-07-10 EJU85KQ GVA → IBZ Jul 10, 04:05 UTCJul 10, 05:40 UTC1h 35m
2026-07-09 EZS35JU - Jul 9, 19:25 UTCJul 9, 20:25 UTC1h 0m
2026-07-09 EZS27FR - Jul 9, 17:30 UTCJul 9, 18:30 UTC1h 0m
2026-07-09 EZS59GQ - Jul 9, 15:30 UTCJul 9, 16:30 UTC1h 0m
2026-07-09 EZS32GV - Jul 9, 14:00 UTCJul 9, 14:50 UTC50m
2026-07-09 EZS41MA - Jul 9, 11:55 UTCJul 9, 13:00 UTC1h 5m
2026-07-09 EZS62TJ - Jul 9, 09:45 UTCJul 9, 10:45 UTC1h 0m
2026-07-09 EJU95FD ALC → GVA Jul 9, 06:50 UTCJul 9, 08:30 UTC1h 40m
2026-07-09 EJU53LX GVA → ALC Jul 9, 04:10 UTCJul 9, 05:50 UTC1h 40m
2026-07-08 EZS78GR VLC → GVA Jul 8, 18:55 UTCJul 8, 20:30 UTC1h 35m
2026-07-08 EZS14EZ GVA → VLC Jul 8, 16:25 UTCJul 8, 17:50 UTC1h 25m
2026-07-08 EZS54RD OPO → GVA Jul 8, 13:30 UTCJul 8, 15:20 UTC1h 50m
2026-07-08 EZS74RG - Jul 8, 10:30 UTCJul 8, 12:25 UTC1h 55m
2026-07-08 EJU95FD ALC → GVA Jul 8, 06:50 UTCJul 8, 08:35 UTC1h 45m
2026-07-08 EJU53LX GVA → ALC Jul 8, 04:15 UTCJul 8, 05:55 UTC1h 40m
2026-07-07 EZS72EU - Jul 7, 14:20 UTCJul 7, 21:35 UTC7h 15m
2026-07-07 EZS16MJ BOD → GVA Jul 7, 12:05 UTCJul 7, 13:05 UTC1h 0m
2026-07-07 EZS25BW GVA → BOD Jul 7, 10:05 UTCJul 7, 11:05 UTC1h 0m
2026-07-07 EZS51JQ LGW → GVA Jul 7, 08:00 UTCJul 7, 09:10 UTC1h 10m
2026-07-07 EZS51PA GVA → LGW Jul 7, 05:10 UTCJul 7, 06:25 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-JZX page for operator, model, and routing details .

Mode-S 4B1A65 frequently asked

What is Mode-S code 4B1A65?
4B1A65 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JZX.
Where is Mode-S 4B1A65 registered?
Mode-S code 4B1A65 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A65 broadcasting right now?
No active broadcast right now. Last signal was 6h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1A65, octal 22615145, decimal 4,921,957.
What flights does 4B1A65 operate?
Mode-S 4B1A65 has broadcast 20 distinct callsigns, including EZS78KD, EZS64DZ, EZS62HY, EZS52NT, EZS48AX.