Apparatus

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sensors Mode-S transponder

4409EF

ICAO 24-bit transponder address · allocated to Austria

Currently assigned to OE-IOI · EMBRAER EMB-135 Legacy

Hex
4409EF
Octal
21004757
Decimal
4,458,991
Country
AT
Tail
OE-IOI
Type
E35L
No current signal · last broadcast 16d ago
Flights observed
61
Distinct callsigns
1
Country
AT
Last broadcast
16d ago

Last known position

Most recent position reported by Mode-S 4409EF.

Country allocation

The ICAO 24-bit address 4409EF falls within the block assigned to Austria (AT) by ICAO Annex 10, Volume III. Every aircraft registered in Austria 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
MJF3B - 61 2026-07-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-21 MJF3B - Jul 21, 11:10 UTCJul 21, 13:35 UTC2h 25m
2026-07-20 MJF3B - Jul 20, 14:20 UTCJul 20, 15:15 UTC55m
2026-07-20 MJF3B - Jul 20, 11:00 UTCJul 20, 11:25 UTC25m
2026-07-17 MJF3B - Jul 17, 13:00 UTCJul 17, 14:55 UTC1h 55m
2026-07-17 MJF3B - Jul 17, 09:55 UTCJul 17, 12:04 UTC2h 10m
2026-07-17 MJF3B NCE → OBF Jul 17, 07:44 UTCJul 17, 08:45 UTC1h 0m
2026-07-15 MJF3B IBZ → NCE Jul 15, 08:35 UTCJul 15, 09:50 UTC1h 15m
2026-07-13 MJF3B NCE → IBZ Jul 13, 14:30 UTCJul 13, 15:45 UTC1h 15m
2026-07-13 MJF3B PGF → NCE Jul 13, 09:40 UTCJul 13, 10:30 UTC50m
2026-07-13 MJF3B IBZ → PGF Jul 13, 07:45 UTCJul 13, 08:35 UTC50m
2026-07-12 MJF3B - Jul 12, 16:35 UTCJul 12, 20:05 UTC3h 30m
2026-07-12 MJF3B - Jul 12, 12:01 UTCJul 12, 14:45 UTC2h 45m
2026-07-11 MJF3B - Jul 11, 19:50 UTCJul 11, 20:30 UTC40m
2026-07-11 MJF3B MXP → LBG Jul 11, 17:15 UTCJul 11, 18:20 UTC1h 5m
2026-07-11 MJF3B - Jul 11, 12:55 UTCJul 11, 15:00 UTC2h 5m
2026-07-07 MJF3B - Jul 7, 10:05 UTCJul 7, 11:30 UTC1h 25m
2026-07-07 MJF3B - Jul 7, 07:10 UTCJul 7, 08:30 UTC1h 20m
2026-07-06 MJF3B ATH → LTN Jul 6, 12:35 UTCJul 6, 16:15 UTC3h 40m
2026-07-06 MJF3B - Jul 6, 07:40 UTCJul 6, 10:45 UTC3h 5m
2026-07-05 MJF3B - Jul 5, 13:20 UTCJul 5, 14:40 UTC1h 20m
2026-07-05 MJF3B - Jul 5, 11:50 UTCJul 5, 12:30 UTC40m
2026-07-05 MJF3B - Jul 5, 07:05 UTCJul 5, 08:25 UTC1h 20m
2026-07-04 MJF3B RHO → ANR Jul 4, 12:55 UTCJul 4, 16:45 UTC3h 50m
2026-07-04 MJF3B - Jul 4, 08:50 UTCJul 4, 11:40 UTC2h 50m
2026-06-30 MJF3B - Jun 30, 15:15 UTCJun 30, 17:25 UTC2h 10m
2026-06-29 MJF3B - Jun 29, 08:19 UTCJun 29, 20:09 UTC11h 50m
2026-06-26 MJF3B IBZ → VLC Jun 26, 10:35 UTCJun 26, 11:05 UTC30m
2026-06-26 MJF3B - Jun 26, 09:00 UTCJun 26, 09:24 UTC25m
2026-06-26 MJF3B - Jun 26, 06:15 UTCJun 26, 07:10 UTC55m
2026-06-23 MJF3B - Jun 23, 11:45 UTCJun 23, 12:49 UTC1h 5m
2026-06-23 MJF3B - Jun 23, 09:20 UTCJun 23, 09:45 UTC25m
2026-06-21 MJF3B - Jun 21, 10:44 UTCJun 21, 11:40 UTC55m
2026-06-18 MJF3B - Jun 18, 18:40 UTCJun 18, 19:45 UTC1h 5m
2026-06-18 MJF3B - Jun 18, 12:05 UTCJun 18, 17:25 UTC5h 20m
2026-06-16 MJF3B - Jun 16, 12:14 UTCJun 16, 14:15 UTC2h 0m
2026-06-15 MJF3B PUY → ISL Jun 15, 17:30 UTCJun 15, 19:14 UTC1h 45m
2026-06-15 MJF3B - Jun 15, 15:10 UTCJun 15, 16:45 UTC1h 35m
2026-06-15 MJF3B - Jun 15, 11:00 UTCJun 15, 13:00 UTC2h 0m
2026-06-14 MJF3B - Jun 14, 13:20 UTCJun 14, 15:05 UTC1h 45m
2026-06-14 MJF3B - Jun 14, 08:00 UTCJun 14, 10:00 UTC2h 0m
2026-06-13 MJF3B STN → NCE Jun 13, 10:45 UTCJun 13, 12:30 UTC1h 45m
2026-06-13 MJF3B - Jun 13, 07:20 UTCJun 13, 08:00 UTC40m
2026-06-07 MJF3B - Jun 7, 14:15 UTCJun 7, 15:00 UTC45m
2026-06-05 MJF3B - Jun 5, 09:10 UTCJun 5, 09:50 UTC40m
2026-06-05 MJF3B - Jun 5, 06:55 UTCJun 5, 07:45 UTC50m
2026-06-03 MJF3B - Jun 3, 23:10 UTCJun 4, 00:45 UTC1h 35m
2026-06-03 MJF3B - Jun 3, 20:40 UTCJun 3, 21:20 UTC40m
2026-05-31 MJF3B - May 31, 12:25 UTCMay 31, 15:10 UTC2h 45m
2026-05-31 MJF3B - May 31, 10:40 UTCMay 31, 11:35 UTC55m
2026-05-19 MJF3B VIE → PRG May 19, 17:20 UTCMay 19, 17:50 UTC30m

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 OE-IOI page for operator, model, and routing details .

Mode-S 4409EF frequently asked

What is Mode-S code 4409EF?
4409EF is an ICAO 24-bit transponder address. Allocated to Austria. Assigned to OE-IOI.
Where is Mode-S 4409EF registered?
Mode-S code 4409EF is allocated to Austria (AT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 4409EF broadcasting right now?
No active broadcast right now. Last signal was 16d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 4409EF, octal 21004757, decimal 4,458,991.
What flights does 4409EF operate?
Mode-S 4409EF has broadcast 1 distinct callsign, including MJF3B.