Apparatus

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sensors Mode-S transponder

4B1A66

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JZY · AIRBUS A-320

Hex
4B1A66
Octal
22615146
Decimal
4,921,958
Country
CH
Tail
HB-JZY
Type
A320
No current signal · last broadcast 1h ago
Flights observed
257
Distinct callsigns
20
Country
CH
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 4B1A66.

Country allocation

The ICAO 24-bit address 4B1A66 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
EJU85QE - 7 2026-05-29
EJU79CA - 7 2026-05-29
EZS73RT Easyjet Switzerland 6 2026-05-24
EZS52HV Easyjet Switzerland 6 2026-05-25
EZS19WQ Easyjet Switzerland 6 2026-05-24
EJU43TE easyJet Europe 6 2026-05-29
EJU42GT easyJet Europe 6 2026-05-29
EZS74RG Easyjet Switzerland 4 2026-05-30
EZS58KB Easyjet Switzerland 4 2026-05-25
EZS54RD Easyjet Switzerland 4 2026-05-30
EZS48AX - 4 2026-05-18
EZS98MW Easyjet Switzerland 3 2026-05-13
EZS81ZH Easyjet Switzerland 3 2026-05-29
EZS79YP Easyjet Switzerland 3 2026-05-16
EZS73NW Easyjet Switzerland 3 2026-04-18
EZS72MD Easyjet Switzerland 3 2026-05-13
EZS71RV - 3 2026-05-01
EZS69UH Easyjet Switzerland 3 2026-05-29
EZS63WG Easyjet Switzerland 3 2026-05-28
EZS63QK Easyjet Switzerland 3 2026-05-13

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 EZS86ZE GVA → HRG May 30, 10:40 UTCMay 30, 14:10 UTC3h 30m
2026-05-30 EZS54RD OPO → GVA May 30, 07:05 UTCMay 30, 08:55 UTC1h 50m
2026-05-30 EZS74RG GVA → OPO May 30, 04:05 UTCMay 30, 06:00 UTC1h 55m
2026-05-29 EZS81AP OLB → GVA May 29, 20:20 UTCMay 29, 21:15 UTC55m
2026-05-29 EZS79ER - May 29, 18:10 UTCMay 29, 19:15 UTC1h 5m
2026-05-29 EJU43TE BCN → GVA May 29, 15:55 UTCMay 29, 17:00 UTC1h 5m
2026-05-29 EJU42GT GVA → BCN May 29, 13:20 UTCMay 29, 14:35 UTC1h 15m
2026-05-29 EJU79CA IBZ → GVA May 29, 10:30 UTCMay 29, 12:05 UTC1h 35m
2026-05-29 EJU85QE GVA → IBZ May 29, 07:55 UTCMay 29, 09:15 UTC1h 20m
2026-05-29 EZS81ZH TLS → GVA May 29, 06:10 UTCMay 29, 07:00 UTC50m
2026-05-29 EZS69UH GVA → TLS May 29, 04:30 UTCMay 29, 05:20 UTC50m
2026-05-28 EZS17GH BOD → GVA May 28, 20:30 UTCMay 28, 21:30 UTC1h 0m
2026-05-28 EZS63WG GVA → BOD May 28, 18:35 UTCMay 28, 19:35 UTC1h 0m
2026-05-28 EZS75KZ TLS → GVA May 28, 16:50 UTCMay 28, 17:40 UTC50m
2026-05-28 EZS26DT GVA → TLS May 28, 15:00 UTCMay 28, 15:55 UTC55m
2026-05-28 EJU16RK TFS → GVA May 28, 09:50 UTCMay 28, 13:15 UTC3h 25m
2026-05-28 EJU31MY OPO → BER May 28, 04:35 UTCMay 28, 08:10 UTC3h 35m
2026-05-27 EJU79CA IBZ → GVA May 27, 19:30 UTCMay 27, 21:00 UTC1h 30m
2026-05-27 EJU85QE GVA → IBZ May 27, 17:00 UTCMay 27, 18:35 UTC1h 35m
2026-05-27 EZS86ZE GVA → HRG May 27, 04:24 UTCMay 27, 14:10 UTC9h 46m
2026-05-26 EZS25WG MLA → GVA May 26, 19:50 UTCMay 26, 21:44 UTC1h 55m
2026-05-26 EZS1573 GVA → MLA May 26, 16:55 UTCMay 26, 18:50 UTC1h 55m
2026-05-26 EZS42JW LGW → GVA May 26, 14:55 UTCMay 26, 16:05 UTC1h 10m
2026-05-26 EZS72YG GVA → LGW May 26, 11:39 UTCMay 26, 12:50 UTC1h 10m
2026-05-26 EZS82UP CFU → GVA May 26, 08:34 UTCMay 26, 10:25 UTC1h 50m
2026-05-26 EZS19CP GVA → CFU May 26, 05:30 UTCMay 26, 07:24 UTC1h 55m
2026-05-25 EZS52HV GVA → RAK May 25, 12:35 UTCMay 25, 19:00 UTC6h 25m
2026-05-25 EZS67AR RAK → GVA May 25, 08:20 UTCMay 25, 10:40 UTC2h 20m
2026-05-25 EZS58KB GVA → RAK May 25, 04:05 UTCMay 25, 06:40 UTC2h 35m
2026-05-24 EZS73RT PRN → GVA May 24, 18:55 UTCMay 24, 20:25 UTC1h 30m
2026-05-24 EZS19WQ GVA → PRN May 24, 15:50 UTCMay 24, 17:40 UTC1h 50m
2026-05-24 EZS93GA DJE → GVA May 24, 09:15 UTCMay 24, 14:15 UTC5h 0m
2026-05-24 EZS84LU BOD → GVA May 24, 07:00 UTCMay 24, 08:00 UTC1h 0m
2026-05-24 EZS46NT GVA → BOD May 24, 05:15 UTCMay 24, 06:15 UTC1h 0m
2026-05-23 EZS52CP HER → GVA May 23, 18:10 UTCMay 23, 20:55 UTC2h 45m
2026-05-23 EZS86XB GVA → HER May 23, 14:10 UTCMay 23, 16:55 UTC2h 45m
2026-05-23 EZS45PQ - May 23, 09:30 UTCMay 23, 13:05 UTC3h 35m
2026-05-23 EZS24XH - May 23, 04:15 UTCMay 23, 08:05 UTC3h 50m
2026-05-22 EZS17GH BOD → GVA May 22, 19:40 UTCMay 22, 20:35 UTC55m
2026-05-22 EZS63WG GVA → BOD May 22, 17:55 UTCMay 22, 18:55 UTC1h 0m
2026-05-22 EZS49JR NCE → GVA May 22, 16:10 UTCMay 22, 16:50 UTC40m
2026-05-22 EZS91HZ GVA → NCE May 22, 14:25 UTCMay 22, 15:10 UTC45m
2026-05-22 EZS59MN NCE → GVA May 22, 11:55 UTCMay 22, 12:40 UTC45m
2026-05-22 EZS1395 GVA → NCE May 22, 10:10 UTCMay 22, 10:50 UTC40m
2026-05-22 EZS19BN BEG → GVA May 22, 07:30 UTCMay 22, 09:05 UTC1h 35m
2026-05-22 EZS75LA GVA → BEG May 22, 04:40 UTCMay 22, 06:35 UTC1h 55m
2026-05-21 EZS34ML LCG → GVA May 21, 13:50 UTCMay 21, 15:35 UTC1h 45m
2026-05-21 EZS1369 GVA → LCG May 21, 10:55 UTCMay 21, 12:50 UTC1h 55m
2026-05-21 EZS46MW TIA → GVA May 21, 08:05 UTCMay 21, 09:55 UTC1h 50m
2026-05-21 EZS31WH - May 21, 05:15 UTCMay 21, 07:00 UTC1h 45m

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

Mode-S 4B1A66 frequently asked

What is Mode-S code 4B1A66?
4B1A66 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JZY.
Where is Mode-S 4B1A66 registered?
Mode-S code 4B1A66 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A66 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1A66, octal 22615146, decimal 4,921,958.
What flights does 4B1A66 operate?
Mode-S 4B1A66 has broadcast 20 distinct callsigns, including EJU85QE, EJU79CA, EZS73RT, EZS52HV, EZS19WQ.