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sensors Mode-S transponder

4B1A1A

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JXA · AIRBUS A-320

Hex
4B1A1A
Octal
22615032
Decimal
4,921,882
Country
CH
Tail
HB-JXA
Type
A320
No current signal · last broadcast Jul 26, 21:00 UTC
Flights observed
569
Distinct callsigns
20
Country
CH
Last broadcast
Jul 26, 21:00 UTC

Last known position

Most recent position reported by Mode-S 4B1A1A.

Country allocation

The ICAO 24-bit address 4B1A1A 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
EZS59MQ Easyjet Switzerland 8 2026-06-03
EZS23YH Easyjet Switzerland 8 2026-06-03
EJU85QE - 6 2026-06-02
EJU54LH - 6 2026-06-29
EJU16BQ - 6 2026-06-29
EZS74UB Easyjet Switzerland 5 2026-07-26
EZS64QE Easyjet Switzerland 5 2026-07-25
EZS54KG Easyjet Switzerland 5 2026-07-26
EZS48DR - 5 2026-07-17
EZS48AX - 5 2026-06-03
EZS27BL Easyjet Switzerland 5 2026-07-25
EZS19WQ Easyjet Switzerland 5 2026-05-28
EZS19HP - 5 2026-07-17
EJU51MB easyJet Europe 5 2026-07-21
EZS91PX - 4 2026-04-15
EZS91JX - 4 2026-07-18
EZS89GX Easyjet Switzerland 4 2026-07-22
EZS79KV Easyjet Switzerland 4 2026-05-20
EZS753A Easyjet Switzerland 4 2026-07-23
EZS74RG Easyjet Switzerland 4 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 EZS54KG BUD → BSL Jul 26, 19:35 UTCJul 26, 21:00 UTC1h 25m
2026-07-26 EZS74UB BSL → BUD Jul 26, 17:30 UTCJul 26, 18:50 UTC1h 20m
2026-07-26 EZS67CP BER → BSL Jul 26, 15:30 UTCJul 26, 16:40 UTC1h 10m
2026-07-26 EZS83KB BSL → BER Jul 26, 13:20 UTCJul 26, 14:20 UTC1h 0m
2026-07-26 EZS62GB KGS → BSL Jul 26, 09:25 UTCJul 26, 12:25 UTC3h 0m
2026-07-26 EZS46HU BSL → KGS Jul 26, 05:10 UTCJul 26, 07:40 UTC2h 31m
2026-07-25 EZS64LP RAK → BSL Jul 25, 19:10 UTCJul 25, 21:45 UTC2h 35m
2026-07-25 EZS34KT BSL → RAK Jul 25, 14:25 UTCJul 25, 17:30 UTC3h 5m
2026-07-25 EZS64QE PMO → BSL Jul 25, 11:10 UTCJul 25, 12:50 UTC1h 40m
2026-07-25 EZS27BL BSL → PMO Jul 25, 08:25 UTCJul 25, 09:55 UTC1h 30m
2026-07-25 EZS53CU BER → BSL Jul 25, 06:35 UTCJul 25, 07:40 UTC1h 5m
2026-07-25 EZS91HE BSL → BER Jul 25, 04:20 UTCJul 25, 05:30 UTC1h 10m
2026-07-24 EZS16QR - Jul 24, 21:10 UTCJul 24, 21:25 UTC15m
2026-07-24 EZS75UD HER → BSL Jul 24, 18:10 UTCJul 24, 21:05 UTC2h 55m
2026-07-24 EZS81MK BSL → HER Jul 24, 14:30 UTCJul 24, 16:50 UTC2h 20m
2026-07-24 EZS34PY CPH → BSL Jul 24, 11:30 UTCJul 24, 13:00 UTC1h 30m
2026-07-24 EZS73TU BSL → CPH Jul 24, 09:05 UTCJul 24, 10:40 UTC1h 35m
2026-07-24 EZS98RM BUD → BSL Jul 24, 06:50 UTCJul 24, 08:10 UTC1h 20m
2026-07-24 EZS74KY BSL → BUD Jul 24, 04:25 UTCJul 24, 05:45 UTC1h 20m
2026-07-23 EZS54KG BUD → BSL Jul 23, 19:40 UTCJul 23, 21:00 UTC1h 20m
2026-07-23 EZS74UB BSL → BUD Jul 23, 17:35 UTCJul 23, 18:55 UTC1h 20m
2026-07-23 EZS349U BOD → BSL Jul 23, 15:30 UTCJul 23, 16:45 UTC1h 15m
2026-07-23 EZS753A BSL → BOD Jul 23, 13:30 UTCJul 23, 14:35 UTC1h 5m
2026-07-23 EZS1278 NBE → BSL Jul 23, 09:20 UTCJul 23, 11:00 UTC1h 40m
2026-07-23 EZS26LA BSL → NBE Jul 23, 05:55 UTCJul 23, 07:40 UTC1h 45m
2026-07-22 EZS45MR - Jul 22, 19:05 UTCJul 22, 20:45 UTC1h 40m
2026-07-22 EZS14LD ZRH → PRN Jul 22, 16:25 UTCJul 22, 17:45 UTC1h 20m
2026-07-22 EZS89GX PRN → ZRH Jul 22, 13:30 UTCJul 22, 15:15 UTC1h 45m
2026-07-22 EZS72ZY BSL → PRN Jul 22, 11:10 UTCJul 22, 12:15 UTC1h 5m
2026-07-21 EJU19DW - Jul 21, 17:05 UTCJul 21, 20:50 UTC3h 45m
2026-07-21 EJU51MB BSL → TFS Jul 21, 11:30 UTCJul 21, 15:40 UTC4h 10m
2026-07-21 EZS41ZM JSI → BSL Jul 21, 07:55 UTCJul 21, 10:30 UTC2h 35m
2026-07-21 EZS52KU BSL → JSI Jul 21, 04:35 UTCJul 21, 06:35 UTC2h 0m
2026-07-20 EZS54KG BUD → BSL Jul 20, 19:35 UTCJul 20, 21:10 UTC1h 35m
2026-07-20 EZS74UB BSL → BUD Jul 20, 17:20 UTCJul 20, 18:35 UTC1h 15m
2026-07-20 EZS64QE PMO → BSL Jul 20, 14:35 UTCJul 20, 16:30 UTC1h 55m
2026-07-20 EZS27BL BSL → PMO Jul 20, 12:10 UTCJul 20, 13:50 UTC1h 40m
2026-07-20 EZS78AY LIS → BSL Jul 20, 08:20 UTCJul 20, 10:30 UTC2h 10m
2026-07-20 EZS98FK BSL → LIS Jul 20, 04:10 UTCJul 20, 06:50 UTC2h 40m
2026-07-19 EZS75UD - Jul 19, 17:50 UTCJul 19, 20:35 UTC2h 45m
2026-07-19 EZS81MK - Jul 19, 14:05 UTCJul 19, 16:35 UTC2h 30m
2026-07-19 EZS1050 - Jul 19, 09:30 UTCJul 19, 12:40 UTC3h 10m
2026-07-19 EZS1049 BSL → ACE Jul 19, 04:10 UTCJul 19, 08:10 UTC4h 0m
2026-07-18 EZS51CE CAG → BSL Jul 18, 18:40 UTCJul 18, 20:05 UTC1h 25m
2026-07-18 EZS91JX - Jul 18, 16:15 UTCJul 18, 17:30 UTC1h 15m
2026-07-18 EZS71UA - Jul 18, 12:15 UTCJul 18, 13:10 UTC55m
2026-07-18 EZS94WL - Jul 18, 10:35 UTCJul 18, 11:30 UTC55m
2026-07-18 EJU85DP IBZ → BSL Jul 18, 08:05 UTCJul 18, 09:45 UTC1h 40m
2026-07-18 EJU85HR BSL → IBZ Jul 18, 04:30 UTCJul 18, 06:15 UTC1h 45m
2026-07-17 EZS19HP - Jul 17, 20:15 UTCJul 17, 21:30 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-JXA page for operator, model, and routing details .

Mode-S 4B1A1A frequently asked

What is Mode-S code 4B1A1A?
4B1A1A is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JXA.
Where is Mode-S 4B1A1A registered?
Mode-S code 4B1A1A is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A1A broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 21:00 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1A1A, octal 22615032, decimal 4,921,882.
What flights does 4B1A1A operate?
Mode-S 4B1A1A has broadcast 20 distinct callsigns, including EZS59MQ, EZS23YH, EJU85QE, EJU54LH, EJU16BQ.