Apparatus

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sensors Mode-S transponder

4B1A5F

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JZR · AIRBUS A-320

Hex
4B1A5F
Octal
22615137
Decimal
4,921,951
Country
CH
Tail
HB-JZR
Type
A320
No current signal · last broadcast Jul 26, 21:30 UTC
Flights observed
552
Distinct callsigns
20
Country
CH
Last broadcast
Jul 26, 21:30 UTC

Last known position

Most recent position reported by Mode-S 4B1A5F.

Country allocation

The ICAO 24-bit address 4B1A5F 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
EJU85HR - 7 2026-07-17
EJU85DP - 7 2026-07-17
EZS59MQ - 6 2026-06-19
EZS51PA - 6 2026-06-22
EZS51JQ Easyjet Switzerland 6 2026-06-13
EZS23YH Easyjet Switzerland 6 2026-06-19
EZS81MK Easyjet Switzerland 5 2026-07-23
EZS75UD Easyjet Switzerland 5 2026-07-23
EZS65PD - 5 2026-07-15
EZS42JW Easyjet Switzerland 5 2026-06-18
EZS21NY - 5 2026-07-15
EZS19HP - 5 2026-07-15
EJU85QE - 5 2026-06-12
EJU79CA - 5 2026-06-12
EJU49VB - 5 2026-07-19
EJU36DT - 5 2026-07-19
EZS98RM Easyjet Switzerland 4 2026-07-25
EZS91HZ Easyjet Switzerland 4 2026-06-18
EZS74KY Easyjet Switzerland 4 2026-07-25
EZS73TU Easyjet Switzerland 4 2026-07-20

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EZS51BG NCE → GVA Jul 26, 20:50 UTCJul 26, 21:30 UTC40m
2026-07-26 EZS707L BSL → NCE Jul 26, 19:00 UTCJul 26, 19:50 UTC50m
2026-07-26 EZS952B TLS → BSL Jul 26, 17:00 UTCJul 26, 18:10 UTC1h 10m
2026-07-26 EZS473H BSL → TLS Jul 26, 15:05 UTCJul 26, 16:05 UTC1h 0m
2026-07-26 EZS87NG FUE → BSL Jul 26, 10:50 UTCJul 26, 13:35 UTC2h 45m
2026-07-26 EZS56RW BSL → FUE Jul 26, 04:35 UTCJul 26, 08:10 UTC3h 36m
2026-07-25 EZS65PB AYT → BSL Jul 25, 18:15 UTCJul 25, 21:35 UTC3h 20m
2026-07-25 EZS1287 BSL → CPH Jul 25, 13:25 UTCJul 25, 16:45 UTC3h 20m
2026-07-25 EZS87XF PUY → BSL Jul 25, 10:55 UTCJul 25, 11:55 UTC1h 0m
2026-07-25 EZS96ZC BSL → PUY Jul 25, 09:10 UTCJul 25, 10:00 UTC50m
2026-07-25 EZS98RM BUD → BSL Jul 25, 06:45 UTCJul 25, 08:05 UTC1h 20m
2026-07-25 EZS74KY BSL → BUD Jul 25, 04:20 UTCJul 25, 05:40 UTC1h 20m
2026-07-24 EZS51TE HAM → BSL Jul 24, 19:45 UTCJul 24, 20:50 UTC1h 5m
2026-07-24 EZS82KM - Jul 24, 17:45 UTCJul 24, 18:55 UTC1h 10m
2026-07-24 EZS498Q MPL → BSL Jul 24, 16:05 UTCJul 24, 16:55 UTC50m
2026-07-24 EZS351Y BSL → MPL Jul 24, 14:20 UTCJul 24, 15:20 UTC1h 0m
2026-07-24 EZS48GE - Jul 24, 11:25 UTCJul 24, 13:10 UTC1h 45m
2026-07-24 EZS34RF BSL → BRI Jul 24, 08:15 UTCJul 24, 09:35 UTC1h 20m
2026-07-24 EZS124Y AJA → BSL Jul 24, 06:10 UTCJul 24, 07:20 UTC1h 10m
2026-07-24 EZS548Q BSL → AJA Jul 24, 04:15 UTCJul 24, 05:20 UTC1h 5m
2026-07-23 EZS23HQ CTA → BSL Jul 23, 18:35 UTCJul 23, 20:40 UTC2h 5m
2026-07-23 EZS85YX BSL → CTA Jul 23, 15:45 UTCJul 23, 17:25 UTC1h 40m
2026-07-23 EZS75UD HER → BSL Jul 23, 11:20 UTCJul 23, 14:15 UTC2h 55m
2026-07-23 EZS81MK BSL → HER Jul 23, 07:35 UTCJul 23, 09:55 UTC2h 20m
2026-07-22 EZS12QD DBV → BSL Jul 22, 18:25 UTCJul 22, 20:05 UTC1h 40m
2026-07-22 EZS86PF BSL → DBV Jul 22, 15:50 UTCJul 22, 17:10 UTC1h 20m
2026-07-22 EZS1062 LPA → BSL Jul 22, 05:10 UTCJul 22, 14:05 UTC8h 55m
2026-07-21 EZS1114 - Jul 21, 20:05 UTCJul 21, 21:35 UTC1h 30m
2026-07-21 EZS1113 - Jul 21, 17:25 UTCJul 21, 18:50 UTC1h 25m
2026-07-21 EZS31MA CFU → BSL Jul 21, 14:35 UTCJul 21, 16:35 UTC2h 0m
2026-07-21 EZS1279 CPH → BSL Jul 21, 11:30 UTCJul 21, 13:05 UTC1h 35m
2026-07-21 EJU54LH MAD → BSL Jul 21, 08:50 UTCJul 21, 10:35 UTC1h 45m
2026-07-21 EJU16BQ BSL → MAD Jul 21, 05:30 UTCJul 21, 07:25 UTC1h 55m
2026-07-20 EJU51UP - Jul 20, 18:55 UTCJul 20, 20:55 UTC2h 0m
2026-07-20 EJU51ND - Jul 20, 14:50 UTCJul 20, 17:15 UTC2h 25m
2026-07-20 EZS26WZ - Jul 20, 12:00 UTCJul 20, 13:10 UTC1h 10m
2026-07-20 EZS16RV - Jul 20, 09:40 UTCJul 20, 10:50 UTC1h 10m
2026-07-20 EZS34PY CPH → BSL Jul 20, 07:10 UTCJul 20, 08:35 UTC1h 25m
2026-07-20 EZS73TU BSL → CPH Jul 20, 04:35 UTCJul 20, 06:05 UTC1h 30m
2026-07-19 EJU36DT SCQ → BSL Jul 19, 18:35 UTCJul 19, 20:30 UTC1h 55m
2026-07-19 EJU49VB BSL → SCQ Jul 19, 15:25 UTCJul 19, 17:30 UTC2h 5m
2026-07-19 EJU19DW - Jul 19, 10:35 UTCJul 19, 14:10 UTC3h 35m
2026-07-19 EJU51MB BSL → TFS Jul 19, 05:05 UTCJul 19, 09:15 UTC4h 10m
2026-07-18 EZS315H BIA → BSL Jul 18, 21:15 UTCJul 18, 22:15 UTC1h 0m
2026-07-18 EZS453Z BSL → BIA Jul 18, 19:20 UTCJul 18, 20:20 UTC1h 0m
2026-07-18 EZS26WZ - Jul 18, 17:20 UTCJul 18, 18:25 UTC1h 5m
2026-07-18 EZS16RV - Jul 18, 14:55 UTCJul 18, 16:00 UTC1h 5m
2026-07-18 EZS1082 - Jul 18, 10:40 UTCJul 18, 11:35 UTC55m
2026-07-18 EZS389K BSL → BIA Jul 18, 08:35 UTCJul 18, 09:25 UTC50m
2026-07-18 EZS78RY SPU → BSL Jul 18, 06:30 UTCJul 18, 07:45 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-JZR page for operator, model, and routing details .

Mode-S 4B1A5F frequently asked

What is Mode-S code 4B1A5F?
4B1A5F is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JZR.
Where is Mode-S 4B1A5F registered?
Mode-S code 4B1A5F is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A5F broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:30 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1A5F, octal 22615137, decimal 4,921,951.
What flights does 4B1A5F operate?
Mode-S 4B1A5F has broadcast 20 distinct callsigns, including EJU85HR, EJU85DP, EZS59MQ, EZS51PA, EZS51JQ.