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sensors Mode-S transponder

4B25EA

ICAO 24-bit transponder address · allocated to Switzerland

Currently assigned to HB-OJI · PIPER PA-28-140/150/160/180

Hex
4B25EA
Octal
22622752
Decimal
4,924,906
Country
CH
Tail
HB-OJI
Type
P28A
No current signal · last broadcast Jul 25, 09:45 UTC
Flights observed
258
Distinct callsigns
1
Country
CH
Last broadcast
Jul 25, 09:45 UTC

Last known position

Most recent position reported by Mode-S 4B25EA.

Country allocation

The ICAO 24-bit address 4B25EA 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 1 distinct

Callsign Airline Flights Last seen
HBOJI - 258 2026-07-25

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-25 HBOJI - Jul 25, 09:30 UTCJul 25, 09:45 UTC15m
2026-07-25 HBOJI - Jul 25, 08:50 UTCJul 25, 09:25 UTC35m
2026-07-25 HBOJI - Jul 25, 07:30 UTCJul 25, 08:10 UTC40m
2026-07-24 HBOJI - Jul 24, 09:20 UTCJul 24, 09:40 UTC20m
2026-07-24 HBOJI - Jul 24, 09:05 UTCJul 24, 09:10 UTC5m
2026-07-24 HBOJI - Jul 24, 07:15 UTCJul 24, 07:50 UTC35m
2026-07-23 HBOJI - Jul 23, 12:20 UTCJul 23, 12:50 UTC30m
2026-07-22 HBOJI - Jul 22, 16:20 UTCJul 22, 16:55 UTC35m
2026-07-22 HBOJI - Jul 22, 12:00 UTCJul 22, 12:35 UTC35m
2026-07-21 HBOJI - Jul 21, 10:35 UTCJul 21, 11:15 UTC40m
2026-07-21 HBOJI - Jul 21, 08:20 UTCJul 21, 08:40 UTC20m
2026-07-21 HBOJI - Jul 21, 06:50 UTCJul 21, 07:15 UTC25m
2026-07-19 HBOJI - Jul 19, 11:45 UTCJul 19, 12:45 UTC1h 0m
2026-07-19 HBOJI - Jul 19, 10:15 UTCJul 19, 10:45 UTC30m
2026-07-19 HBOJI - Jul 19, 07:50 UTCJul 19, 08:10 UTC20m
2026-07-19 HBOJI - Jul 19, 07:00 UTCJul 19, 07:15 UTC15m
2026-07-18 HBOJI - Jul 18, 13:15 UTCJul 18, 14:05 UTC50m
2026-07-18 HBOJI - Jul 18, 11:40 UTCJul 18, 12:30 UTC50m
2026-07-18 HBOJI - Jul 18, 10:20 UTCJul 18, 10:50 UTC30m
2026-07-18 HBOJI - Jul 18, 08:25 UTCJul 18, 09:25 UTC1h 0m
2026-07-18 HBOJI - Jul 18, 06:40 UTCJul 18, 07:50 UTC1h 10m
2026-07-17 HBOJI - Jul 17, 15:29 UTCJul 17, 15:49 UTC20m
2026-07-17 HBOJI - Jul 17, 14:39 UTCJul 17, 14:55 UTC15m
2026-07-17 HBOJI - Jul 17, 12:15 UTCJul 17, 13:05 UTC50m
2026-07-17 HBOJI - Jul 17, 11:10 UTCJul 17, 11:30 UTC20m
2026-07-17 HBOJI - Jul 17, 09:04 UTCJul 17, 09:55 UTC50m
2026-07-16 HBOJI - Jul 16, 10:35 UTCJul 16, 12:09 UTC1h 35m
2026-07-16 HBOJI - Jul 16, 06:45 UTCJul 16, 07:10 UTC25m
2026-07-15 HBOJI - Jul 15, 15:05 UTCJul 15, 16:05 UTC1h 0m
2026-07-15 HBOJI - Jul 15, 08:45 UTCJul 15, 09:15 UTC30m
2026-07-15 HBOJI - Jul 15, 08:05 UTCJul 15, 08:20 UTC15m
2026-07-15 HBOJI - Jul 15, 07:45 UTCJul 15, 08:00 UTC15m
2026-07-15 HBOJI - Jul 15, 07:30 UTCJul 15, 07:40 UTC10m
2026-07-15 HBOJI - Jul 15, 07:15 UTCJul 15, 07:25 UTC10m
2026-07-14 HBOJI - Jul 14, 14:10 UTCJul 14, 14:35 UTC25m
2026-07-14 HBOJI - Jul 14, 12:40 UTCJul 14, 13:00 UTC20m
2026-07-14 HBOJI - Jul 14, 08:45 UTCJul 14, 09:35 UTC50m
2026-07-10 HBOJI - Jul 10, 14:05 UTCJul 10, 14:20 UTC15m
2026-07-10 HBOJI - Jul 10, 09:20 UTCJul 10, 09:35 UTC15m
2026-07-09 HBOJI - Jul 9, 14:15 UTCJul 9, 15:00 UTC45m
2026-07-09 HBOJI - Jul 9, 11:30 UTCJul 9, 12:15 UTC45m
2026-07-09 HBOJI - Jul 9, 06:10 UTCJul 9, 06:30 UTC20m
2026-07-08 HBOJI - Jul 8, 15:40 UTCJul 8, 16:05 UTC25m
2026-07-08 HBOJI - Jul 8, 14:15 UTCJul 8, 14:45 UTC30m
2026-07-08 HBOJI - Jul 8, 12:25 UTCJul 8, 13:00 UTC35m
2026-07-08 HBOJI - Jul 8, 08:05 UTCJul 8, 08:45 UTC40m
2026-07-08 HBOJI - Jul 8, 06:45 UTCJul 8, 07:20 UTC35m
2026-07-07 HBOJI - Jul 7, 15:40 UTCJul 7, 16:45 UTC1h 5m
2026-07-07 HBOJI - Jul 7, 14:15 UTCJul 7, 14:50 UTC35m
2026-07-07 HBOJI - Jul 7, 09:15 UTCJul 7, 09:30 UTC15m

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

Mode-S 4B25EA frequently asked

What is Mode-S code 4B25EA?
4B25EA is an ICAO 24-bit transponder address. Allocated to Switzerland. Assigned to HB-OJI.
Where is Mode-S 4B25EA registered?
Mode-S code 4B25EA is allocated to Switzerland (CH). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4B25EA broadcasting right now?
No active broadcast right now. Last signal was Jul 25, 09:45 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4B25EA, octal 22622752, decimal 4,924,906.
What flights does 4B25EA operate?
Mode-S 4B25EA has broadcast 1 distinct callsign, including HBOJI.