Apparatus

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sensors Mode-S transponder

4B1A2A

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JXQ · AIRBUS A-320

Hex
4B1A2A
Octal
22615052
Decimal
4,921,898
Country
CH
Tail
HB-JXQ
Type
A320
No current signal · last broadcast Jul 26, 19:10 UTC
Flights observed
581
Distinct callsigns
20
Country
CH
Last broadcast
Jul 26, 19:10 UTC

Last known position

Most recent position reported by Mode-S 4B1A2A.

Country allocation

The ICAO 24-bit address 4B1A2A 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
EZS51JQ Easyjet Switzerland 11 2026-07-24
EZS51PA - 10 2026-07-24
EZS73RT Easyjet Switzerland 7 2026-07-17
EZS59MQ - 7 2026-07-15
EZS23YH - 7 2026-07-15
EZS19WQ - 7 2026-07-17
EZS84LU Easyjet Switzerland 6 2026-06-14
EZS78KD - 6 2026-07-26
EZS75JQ - 6 2026-07-26
EZS62HY - 6 2026-07-15
EZS61HE Easyjet Switzerland 6 2026-07-22
EZS52HV Easyjet Switzerland 6 2026-07-21
EZS31QP Easyjet Switzerland 6 2026-07-25
EZS91PX Easyjet Switzerland 5 2026-06-26
EZS89PM Easyjet Switzerland 5 2026-07-22
EZS81AP Easyjet Switzerland 5 2026-07-24
EZS79ER - 5 2026-07-24
EZS72YG - 5 2026-07-25
EZS68GV - 5 2026-06-26
EZS67UZ Easyjet Switzerland 5 2026-06-09

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EZS75JQ - Jul 26, 17:30 UTCJul 26, 19:10 UTC1h 40m
2026-07-26 EZS78KD - Jul 26, 14:40 UTCJul 26, 16:05 UTC1h 25m
2026-07-26 EZS79KV VCE → GVA Jul 26, 11:50 UTCJul 26, 12:40 UTC50m
2026-07-26 EZS63KJ - Jul 26, 09:55 UTCJul 26, 10:50 UTC55m
2026-07-26 EJU52WT SCQ → GVA Jul 26, 06:50 UTCJul 26, 08:45 UTC1h 55m
2026-07-26 EJU82PN GVA → SCQ Jul 26, 04:10 UTCJul 26, 05:50 UTC1h 40m
2026-07-25 EJU79CA IBZ → GVA Jul 25, 20:30 UTCJul 25, 21:55 UTC1h 25m
2026-07-25 EJU85QE - Jul 25, 17:35 UTCJul 25, 19:00 UTC1h 25m
2026-07-25 EZS32AW LGW → GVA Jul 25, 15:00 UTCJul 25, 16:10 UTC1h 10m
2026-07-25 EZS72YG GVA → LGW Jul 25, 12:20 UTCJul 25, 13:35 UTC1h 15m
2026-07-25 EZS31QP ATH → GVA Jul 25, 08:45 UTCJul 25, 11:25 UTC2h 40m
2026-07-25 EZS49KC GVA → ATH Jul 25, 05:20 UTCJul 25, 07:35 UTC2h 15m
2026-07-24 EZS81AP OLB → GVA Jul 24, 20:50 UTCJul 24, 21:50 UTC1h 0m
2026-07-24 EZS79ER - Jul 24, 18:45 UTCJul 24, 19:45 UTC1h 0m
2026-07-24 EJU43TE BCN → GVA Jul 24, 16:40 UTCJul 24, 17:45 UTC1h 5m
2026-07-24 EJU42GT GVA → BCN Jul 24, 14:10 UTCJul 24, 15:30 UTC1h 20m
2026-07-24 EZS59MN NCE → GVA Jul 24, 11:55 UTCJul 24, 12:35 UTC40m
2026-07-24 EZS1395 GVA → NCE Jul 24, 10:20 UTCJul 24, 11:00 UTC40m
2026-07-24 EZS51JQ LGW → GVA Jul 24, 08:00 UTCJul 24, 09:10 UTC1h 10m
2026-07-24 EZS51PA GVA → LGW Jul 24, 05:10 UTCJul 24, 06:15 UTC1h 5m
2026-07-23 EZS17GH BOD → GVA Jul 23, 20:30 UTCJul 23, 21:25 UTC55m
2026-07-23 EZS63WG GVA → BOD Jul 23, 18:25 UTCJul 23, 19:35 UTC1h 10m
2026-07-23 EZS34AF OPO → GVA Jul 23, 16:15 UTCJul 23, 17:25 UTC1h 10m
2026-07-23 EZS43HQ - Jul 23, 14:10 UTCJul 23, 15:25 UTC1h 15m
2026-07-23 EZS43JB RHO → GVA Jul 23, 09:45 UTCJul 23, 12:55 UTC3h 10m
2026-07-23 EZS62AV GVA → RHO Jul 23, 05:15 UTCJul 23, 07:55 UTC2h 40m
2026-07-22 EZS35JU - Jul 22, 19:30 UTCJul 22, 20:25 UTC55m
2026-07-22 EZS27FR - Jul 22, 17:30 UTCJul 22, 18:30 UTC1h 0m
2026-07-22 EZS89PM FCO → GVA Jul 22, 15:20 UTCJul 22, 16:25 UTC1h 5m
2026-07-22 EZS61HE GVA → FCO Jul 22, 13:15 UTCJul 22, 14:20 UTC1h 5m
2026-07-22 EZS41MA NTE → GVA Jul 22, 11:10 UTCJul 22, 12:05 UTC55m
2026-07-22 EJU42GT GVA → BCN Jul 22, 04:25 UTCJul 22, 05:25 UTC1h 0m
2026-07-21 EZS51BG NCE → GVA Jul 21, 19:50 UTCJul 21, 20:35 UTC45m
2026-07-21 EZS53VN GVA → NCE Jul 21, 18:20 UTCJul 21, 19:05 UTC45m
2026-07-21 EZS24HA LUX → BER Jul 21, 14:40 UTCJul 21, 16:30 UTC1h 50m
2026-07-21 EZS32QW GVA → BDS Jul 21, 12:05 UTCJul 21, 13:35 UTC1h 30m
2026-07-21 EZS84BA - Jul 21, 08:40 UTCJul 21, 11:05 UTC2h 25m
2026-07-21 EZS52HV GVA → RAK Jul 21, 04:35 UTCJul 21, 07:05 UTC2h 30m
2026-07-20 EZS48NQ - Jul 20, 19:00 UTCJul 20, 21:05 UTC2h 5m
2026-07-20 EZS21WG - Jul 20, 15:40 UTCJul 20, 17:05 UTC1h 25m
2026-07-20 EZS75JQ BDS → GVA Jul 20, 12:10 UTCJul 20, 14:00 UTC1h 50m
2026-07-20 EZS78KD GVA → BDS Jul 20, 09:35 UTCJul 20, 11:05 UTC1h 30m
2026-07-20 EZS98NZ - Jul 20, 07:10 UTCJul 20, 08:35 UTC1h 25m
2026-07-20 EZS81FQ GVA → MAH Jul 20, 05:10 UTCJul 20, 06:20 UTC1h 10m
2026-07-19 EZS23NZ KRK → GVA Jul 19, 19:10 UTCJul 19, 21:00 UTC1h 50m
2026-07-19 EZS75ML GVA → KRK Jul 19, 16:35 UTCJul 19, 18:05 UTC1h 30m
2026-07-19 EJU87RL IBZ → GVA Jul 19, 14:05 UTCJul 19, 15:35 UTC1h 30m
2026-07-19 EJU85KQ - Jul 19, 11:35 UTCJul 19, 13:05 UTC1h 30m
2026-07-19 EZS14LH - Jul 19, 08:20 UTCJul 19, 10:10 UTC1h 50m
2026-07-19 EZS12XR GVA → PRN Jul 19, 05:00 UTCJul 19, 06:30 UTC1h 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-JXQ page for operator, model, and routing details .

Mode-S 4B1A2A frequently asked

What is Mode-S code 4B1A2A?
4B1A2A is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JXQ.
Where is Mode-S 4B1A2A registered?
Mode-S code 4B1A2A is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A2A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 19:10 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1A2A, octal 22615052, decimal 4,921,898.
What flights does 4B1A2A operate?
Mode-S 4B1A2A has broadcast 20 distinct callsigns, including EZS51JQ, EZS51PA, EZS73RT, EZS59MQ, EZS23YH.