Apparatus

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sensors Mode-S transponder

3E3EE4

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-IPAA · CESSNA 525 Citation M2

Hex
3E3EE4
Octal
17437344
Decimal
4,079,332
Country
DE
Tail
D-IPAA
Type
C25M
No current signal · last broadcast 18d ago
Flights observed
106
Distinct callsigns
2
Country
DE
Last broadcast
18d ago

Last known position

Most recent position reported by Mode-S 3E3EE4.

Country allocation

The ICAO 24-bit address 3E3EE4 falls within the block assigned to Germany (DE) by ICAO Annex 10, Volume III. Every aircraft registered in Germany 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 2 distinct

Callsign Airline Flights Last seen
HRN124 - 105 2026-06-25
TEST - 1 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-06-25 HRN124 - Jun 25, 13:35 UTCJun 25, 14:20 UTC45m
2026-06-24 HRN124 BWE → ZAZ Jun 24, 21:34 UTCJun 25, 00:05 UTC2h 30m
2026-06-24 HRN124 - Jun 24, 06:15 UTCJun 24, 09:09 UTC2h 55m
2026-06-23 HRN124 MAD → ZAZ Jun 23, 15:30 UTCJun 23, 16:05 UTC35m
2026-06-23 HRN124 - Jun 23, 13:29 UTCJun 23, 14:10 UTC40m
2026-06-23 HRN124 - Jun 23, 10:49 UTCJun 23, 11:24 UTC35m
2026-06-22 HRN124 - Jun 22, 16:54 UTCJun 22, 17:40 UTC45m
2026-06-22 HRN124 LCG → ZAZ Jun 22, 14:55 UTCJun 22, 15:59 UTC1h 5m
2026-06-22 HRN124 - Jun 22, 10:30 UTCJun 22, 11:39 UTC1h 10m
2026-06-21 HRN124 - Jun 21, 15:05 UTCJun 21, 15:49 UTC45m
2026-06-19 HRN124 - Jun 19, 15:24 UTCJun 19, 16:14 UTC50m
2026-06-18 HRN124 - Jun 18, 20:15 UTCJun 18, 21:30 UTC1h 15m
2026-06-18 HRN124 - Jun 18, 18:05 UTCJun 18, 19:15 UTC1h 10m
2026-06-18 HRN124 - Jun 18, 16:30 UTCJun 18, 17:21 UTC51m
2026-06-18 HRN124 - Jun 18, 14:35 UTCJun 18, 15:10 UTC35m
2026-06-16 HRN124 - Jun 16, 17:15 UTCJun 16, 17:49 UTC35m
2026-06-16 HRN124 - Jun 16, 14:45 UTCJun 16, 15:30 UTC45m
2026-06-15 HRN124 - Jun 15, 15:40 UTCJun 15, 17:40 UTC2h 0m
2026-06-15 HRN124 - Jun 15, 12:35 UTCJun 15, 14:05 UTC1h 30m
2026-06-15 HRN124 - Jun 15, 07:45 UTCJun 15, 08:29 UTC45m
2026-06-15 HRN124 - Jun 15, 06:10 UTCJun 15, 07:00 UTC50m
2026-06-13 HRN124 - Jun 13, 09:35 UTCJun 13, 10:10 UTC35m
2026-06-13 HRN124 - Jun 13, 08:00 UTCJun 13, 08:50 UTC50m
2026-06-12 HRN124 - Jun 12, 16:25 UTCJun 12, 16:45 UTC20m
2026-06-12 HRN124 - Jun 12, 10:45 UTCJun 12, 11:50 UTC1h 5m
2026-06-12 HRN124 - Jun 12, 09:25 UTCJun 12, 10:20 UTC55m
2026-06-12 HRN124 - Jun 12, 07:30 UTCJun 12, 08:00 UTC30m
2026-06-10 HRN124 - Jun 10, 10:15 UTCJun 10, 12:20 UTC2h 5m
2026-06-10 HRN124 - Jun 10, 07:20 UTCJun 10, 09:05 UTC1h 45m
2026-06-08 HRN124 - Jun 8, 08:20 UTCJun 8, 09:00 UTC40m
2026-06-08 HRN124 - Jun 8, 06:00 UTCJun 8, 07:35 UTC1h 35m
2026-06-07 HRN124 - Jun 7, 13:40 UTCJun 7, 14:40 UTC1h 0m
2026-06-07 HRN124 - Jun 7, 11:40 UTCJun 7, 12:50 UTC1h 10m
2026-06-07 HRN124 - Jun 7, 08:25 UTCJun 7, 09:25 UTC1h 0m
2026-06-05 HRN124 BCN → ZAZ Jun 5, 16:00 UTCJun 5, 16:40 UTC40m
2026-06-05 HRN124 IBZ → BCN Jun 5, 14:05 UTCJun 5, 14:45 UTC40m
2026-06-05 HRN124 - Jun 5, 10:45 UTCJun 5, 12:20 UTC1h 35m
2026-06-04 HRN124 - Jun 4, 19:10 UTCJun 4, 20:50 UTC1h 40m
2026-06-04 HRN124 - Jun 4, 17:40 UTCJun 4, 18:25 UTC45m
2026-06-04 HRN124 - Jun 4, 15:45 UTCJun 4, 16:45 UTC1h 0m
2026-06-04 HRN124 - Jun 4, 12:35 UTCJun 4, 13:15 UTC40m
2026-06-03 HRN124 - Jun 3, 17:35 UTCJun 3, 18:10 UTC35m
2026-06-03 HRN124 - Jun 3, 15:20 UTCJun 3, 16:30 UTC1h 10m
2026-06-01 HRN124 - Jun 1, 08:20 UTCJun 1, 09:30 UTC1h 10m
2026-06-01 HRN124 - Jun 1, 06:10 UTCJun 1, 06:55 UTC45m
2026-05-29 HRN124 - May 29, 13:10 UTCMay 29, 13:45 UTC35m
2026-05-29 HRN124 - May 29, 07:40 UTCMay 29, 08:00 UTC20m
2026-05-29 TEST - May 29, 06:50 UTCMay 29, 07:35 UTC45m
2026-05-28 HRN124 - May 28, 11:40 UTCMay 28, 12:30 UTC50m
2026-05-26 HRN124 - May 26, 15:45 UTCMay 26, 16:40 UTC55m

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 D-IPAA page for operator, model, and routing details .

Mode-S 3E3EE4 frequently asked

What is Mode-S code 3E3EE4?
3E3EE4 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-IPAA.
Where is Mode-S 3E3EE4 registered?
Mode-S code 3E3EE4 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3E3EE4 broadcasting right now?
No active broadcast right now. Last signal was 18d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3E3EE4, octal 17437344, decimal 4,079,332.
What flights does 3E3EE4 operate?
Mode-S 3E3EE4 has broadcast 2 distinct callsigns, including HRN124, TEST.