Apparatus

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sensors Mode-S transponder

4B1A25

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-JXL · AIRBUS A-320

Hex
4B1A25
Octal
22615045
Decimal
4,921,893
Country
CH
Tail
HB-JXL
Type
A320
Broadcasting now · callsign EZS52NT · 33,225 ft
Flights observed
575
Distinct callsigns
20
Country
CH
Last broadcast
2h ago

Current position

4B1A25 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 4B1A25 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
EZS58KB - 8 2026-06-21
EZS53VN Easyjet Switzerland 7 2026-06-24
EZS51BG - 7 2026-06-24
EZS79EL Easyjet Switzerland 6 2026-06-21
EZS75XR Easyjet Switzerland 6 2026-06-21
EJU85HR - 6 2026-07-08
EJU85DP - 6 2026-07-08
EZS84LU - 5 2026-06-19
EZS78KD - 5 2026-06-20
EZS75JQ - 5 2026-06-20
EZS67AR - 5 2026-06-16
EZS46NT - 5 2026-06-19
EZS91JX - 4 2026-07-14
EZS89GX - 4 2026-07-14
EZS87PJ Easyjet Switzerland 4 2026-04-19
EZS78GR Easyjet Switzerland 4 2026-06-14
EZS75KZ Easyjet Switzerland 4 2026-06-18
EZS51CE - 4 2026-07-14
EZS34AF Easyjet Switzerland 4 2026-05-07
EZS19HP - 4 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-15 EZS498Q - Jul 15, 06:05 UTCJul 15, 07:00 UTC55m
2026-07-15 EZS351Y - Jul 15, 04:20 UTCJul 15, 05:15 UTC55m
2026-07-14 EZS67UZ - Jul 14, 19:50 UTCJul 14, 21:35 UTC1h 45m
2026-07-14 EZS14LD ZRH → PRN Jul 14, 17:25 UTCJul 14, 18:50 UTC1h 25m
2026-07-14 EZS89GX - Jul 14, 14:10 UTCJul 14, 15:55 UTC1h 45m
2026-07-14 EZS29ZA - Jul 14, 10:55 UTCJul 14, 12:35 UTC1h 40m
2026-07-14 EZS51CE - Jul 14, 08:20 UTCJul 14, 09:50 UTC1h 30m
2026-07-14 EZS91JX - Jul 14, 05:25 UTCJul 14, 06:40 UTC1h 15m
2026-07-13 EZS39AR CPH → BSL Jul 13, 20:10 UTCJul 13, 21:25 UTC1h 15m
2026-07-13 EZS25UF - Jul 13, 17:55 UTCJul 13, 19:15 UTC1h 20m
2026-07-13 EZS65EW VCE → BSL Jul 13, 16:10 UTCJul 13, 16:55 UTC45m
2026-07-13 EZS83LE BSL → VCE Jul 13, 13:35 UTCJul 13, 14:20 UTC45m
2026-07-13 EZS785C BOD → BSL Jul 13, 11:30 UTCJul 13, 12:35 UTC1h 5m
2026-07-13 EZS949Y - Jul 13, 09:30 UTCJul 13, 10:40 UTC1h 10m
2026-07-13 EZS934R - Jul 13, 07:20 UTCJul 13, 08:10 UTC50m
2026-07-13 EZS804A BSL → LIL Jul 13, 04:35 UTCJul 13, 05:31 UTC55m
2026-07-12 EZS34PY - Jul 12, 19:35 UTCJul 12, 21:00 UTC1h 25m
2026-07-12 EZS73TU - Jul 12, 17:05 UTCJul 12, 18:30 UTC1h 25m
2026-07-12 EZS47VV - Jul 12, 14:01 UTCJul 12, 15:55 UTC1h 55m
2026-07-12 EZS57GP - Jul 12, 11:20 UTCJul 12, 12:55 UTC1h 35m
2026-07-12 EZS78RY - Jul 12, 06:50 UTCJul 12, 08:05 UTC1h 15m
2026-07-12 EZS69AF - Jul 12, 04:25 UTCJul 12, 05:20 UTC55m
2026-07-11 EZS73NJ - Jul 11, 18:10 UTCJul 11, 20:10 UTC2h 0m
2026-07-11 EZS1281 BSL → MLA Jul 11, 15:20 UTCJul 11, 17:20 UTC2h 0m
2026-07-11 EZS68ME BDS → BSL Jul 11, 12:35 UTCJul 11, 14:20 UTC1h 45m
2026-07-11 EZS52RH - Jul 11, 10:10 UTCJul 11, 11:45 UTC1h 35m
2026-07-11 EZS1080 - Jul 11, 07:25 UTCJul 11, 08:45 UTC1h 20m
2026-07-11 EZS93EV - Jul 11, 05:01 UTCJul 11, 06:25 UTC1h 25m
2026-07-10 EZS67UZ - Jul 10, 19:45 UTCJul 10, 21:25 UTC1h 40m
2026-07-10 EZS14LD ZRH → PRN Jul 10, 17:30 UTCJul 10, 18:50 UTC1h 20m
2026-07-10 EZS89GX - Jul 10, 13:30 UTCJul 10, 15:15 UTC1h 45m
2026-07-10 EZS29ZA - Jul 10, 10:35 UTCJul 10, 12:05 UTC1h 30m
2026-07-10 EZS51CE - Jul 10, 08:05 UTCJul 10, 09:30 UTC1h 25m
2026-07-10 EZS91JX - Jul 10, 05:35 UTCJul 10, 07:10 UTC1h 35m
2026-07-09 EZS54KG - Jul 9, 19:45 UTCJul 9, 21:05 UTC1h 20m
2026-07-09 EZS74UB - Jul 9, 17:40 UTCJul 9, 19:00 UTC1h 20m
2026-07-09 EZS349U BOD → BSL Jul 9, 15:40 UTCJul 9, 16:50 UTC1h 10m
2026-07-09 EZS753A - Jul 9, 13:40 UTCJul 9, 14:45 UTC1h 5m
2026-07-09 EZS87KU - Jul 9, 10:55 UTCJul 9, 12:15 UTC1h 20m
2026-07-09 EZS61NC - Jul 9, 08:40 UTCJul 9, 09:35 UTC55m
2026-07-09 EZS32PC - Jul 9, 06:15 UTCJul 9, 07:30 UTC1h 15m
2026-07-09 EZS21MA - Jul 9, 04:15 UTCJul 9, 05:15 UTC1h 0m
2026-07-08 EZS575A - Jul 8, 20:50 UTCJul 8, 21:35 UTC45m
2026-07-08 EZS707L - Jul 8, 19:05 UTCJul 8, 20:00 UTC55m
2026-07-08 EZS124Y - Jul 8, 17:05 UTCJul 8, 18:10 UTC1h 5m
2026-07-08 EZS548Q - Jul 8, 14:35 UTCJul 8, 15:35 UTC1h 0m
2026-07-08 EJU85DP IBZ → BSL Jul 8, 11:40 UTCJul 8, 13:20 UTC1h 40m
2026-07-08 EJU85HR - Jul 8, 08:25 UTCJul 8, 10:00 UTC1h 35m
2026-07-08 EZS1048 - Jul 8, 06:30 UTCJul 8, 07:40 UTC1h 10m
2026-07-08 EZS598Z - Jul 8, 04:15 UTCJul 8, 05:30 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-JXL page for operator, model, and routing details .

Mode-S 4B1A25 frequently asked

What is Mode-S code 4B1A25?
4B1A25 is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-JXL.
Where is Mode-S 4B1A25 registered?
Mode-S code 4B1A25 is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B1A25 broadcasting right now?
Yes. Mode-S 4B1A25 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B1A25, octal 22615045, decimal 4,921,893.
What flights does 4B1A25 operate?
Mode-S 4B1A25 has broadcast 20 distinct callsigns, including EZS58KB, EZS53VN, EZS51BG, EZS79EL, EZS75XR.