Apparatus

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sensors Mode-S transponder

3C4AD9

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ABVY · BOEING 747-400

Hex
3C4AD9
Octal
17045331
Decimal
3,951,321
Country
DE
Tail
D-ABVY
Type
B744
No current signal · last broadcast 1d ago
Flights observed
160
Distinct callsigns
16
Country
DE
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 3C4AD9.

Country allocation

The ICAO 24-bit address 3C4AD9 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 16 distinct

Callsign Airline Flights Last seen
DLH754 - 20 2026-07-12
DLH780 Lufthansa 18 2026-06-28
DLH755 - 18 2026-07-13
DLH781 Lufthansa 16 2026-06-29
DLH441 - 11 2026-07-04
DLH423 - 11 2026-06-19
DLH3CF Lufthansa 11 2026-07-04
DLH7K - 10 2026-06-18
DLH493 - 8 2026-07-09
DLH492 - 8 2026-07-09
DLH781D Lufthansa 7 2026-04-18
DLH780D Lufthansa 5 2026-04-17
DLH470 - 5 2026-07-11
DLH471 - 4 2026-07-11
DLH455 Lufthansa 4 2026-05-31
DLH454 Lufthansa 4 2026-05-31

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 DLH755 - Jul 13, 04:10 UTCJul 13, 07:05 UTC2h 55m
2026-07-12 DLH755 - Jul 12, 21:55 UTCJul 13, 04:05 UTC6h 10m
2026-07-12 DLH754 - Jul 12, 19:25 UTCJul 12, 19:35 UTC10m
2026-07-12 DLH754 - Jul 12, 11:20 UTCJul 12, 18:01 UTC6h 40m
2026-07-11 DLH471 YYZ → FRA Jul 11, 22:50 UTCJul 12, 05:55 UTC7h 5m
2026-07-11 DLH470 FRA → YYZ Jul 11, 12:30 UTCJul 11, 20:10 UTC7h 40m
2026-07-09 DLH493 YVR → FRA Jul 9, 23:30 UTCJul 10, 08:20 UTC8h 50m
2026-07-09 DLH492 FRA → YVR Jul 9, 11:55 UTCJul 9, 21:15 UTC9h 20m
2026-07-08 DLH471 YYZ → FRA Jul 8, 23:05 UTCJul 9, 06:10 UTC7h 5m
2026-07-08 DLH470 - Jul 8, 12:25 UTCJul 8, 20:10 UTC7h 45m
2026-07-07 DLH493 - Jul 7, 23:45 UTCJul 8, 08:40 UTC8h 55m
2026-07-07 DLH492 FRA → YVR Jul 7, 11:50 UTCJul 7, 21:30 UTC9h 40m
2026-07-06 DLH471 YYZ → FRA Jul 6, 23:55 UTCJul 7, 06:35 UTC6h 40m
2026-07-06 DLH470 FRA → YYZ Jul 6, 14:25 UTCJul 6, 21:15 UTC6h 50m
2026-07-06 DLH470 FRA → YYZ Jul 6, 13:20 UTCJul 6, 14:20 UTC1h 0m
2026-07-05 DLH493 - Jul 5, 23:50 UTCJul 6, 08:40 UTC8h 50m
2026-07-05 DLH492 FRA → YVR Jul 5, 12:00 UTCJul 5, 21:45 UTC9h 45m
2026-07-04 DLH441 - Jul 4, 22:10 UTCJul 5, 06:50 UTC8h 40m
2026-07-04 DLH3CF ARN → FRA Jul 4, 09:10 UTCJul 4, 19:30 UTC10h 20m
2026-07-02 DLH441 - Jul 2, 23:40 UTCJul 3, 08:35 UTC8h 55m
2026-07-02 DLH3CF ARN → FRA Jul 2, 10:20 UTCJul 2, 20:45 UTC10h 25m
2026-06-30 DLH755 - Jun 30, 23:40 UTCJul 1, 08:25 UTC8h 45m
2026-06-30 DLH754 FRA → BLR Jun 30, 21:15 UTCJun 30, 21:25 UTC10m
2026-06-30 DLH754 FRA → BLR Jun 30, 13:05 UTCJun 30, 19:55 UTC6h 50m
2026-06-29 DLH781 SIN → FRA Jun 29, 16:04 UTCJun 30, 04:15 UTC12h 11m
2026-06-28 DLH780 FRA → SIN Jun 28, 20:19 UTCJun 29, 08:14 UTC11h 55m
2026-06-26 DLH781 SIN → FRA Jun 26, 16:39 UTCJun 27, 04:39 UTC12h 0m
2026-06-25 DLH780 FRA → SIN Jun 25, 20:54 UTCJun 26, 08:40 UTC11h 45m
2026-06-23 DLH755 - Jun 23, 23:05 UTCJun 24, 07:20 UTC8h 15m
2026-06-23 DLH754 FRA → BLR Jun 23, 11:45 UTCJun 23, 18:39 UTC6h 55m
2026-06-22 DLH755 - Jun 22, 22:54 UTCJun 23, 07:19 UTC8h 25m
2026-06-22 DLH754 FRA → BLR Jun 22, 19:54 UTCJun 22, 20:04 UTC10m
2026-06-22 DLH754 FRA → BLR Jun 22, 11:39 UTCJun 22, 18:30 UTC6h 50m
2026-06-21 DLH441 - Jun 21, 21:39 UTCJun 22, 06:35 UTC8h 55m
2026-06-21 DLH3CF ARN → FRA Jun 21, 08:49 UTCJun 21, 19:00 UTC10h 10m
2026-06-20 DLH781 SIN → FRA Jun 20, 16:09 UTCJun 21, 04:30 UTC12h 20m
2026-06-19 DLH780 FRA → SIN Jun 19, 20:24 UTCJun 20, 07:39 UTC11h 15m
2026-06-19 DLH423 - Jun 19, 05:09 UTCJun 19, 05:24 UTC15m
2026-06-18 DLH423 BOS → FRA Jun 18, 22:40 UTCJun 19, 05:00 UTC6h 19m
2026-06-18 DLH7K FRA → BOS Jun 18, 12:20 UTCJun 18, 20:15 UTC7h 55m
2026-06-17 DLH493 YVR → FRA Jun 17, 23:55 UTCJun 18, 09:00 UTC9h 5m
2026-06-17 DLH492 FRA → YVR Jun 17, 12:20 UTCJun 17, 21:35 UTC9h 15m
2026-06-17 DLH755 - Jun 17, 01:20 UTCJun 17, 07:20 UTC6h 0m
2026-06-16 DLH755 - Jun 16, 22:10 UTCJun 16, 22:25 UTC15m
2026-06-16 DLH754 FRA → BLR Jun 16, 19:50 UTCJun 16, 20:00 UTC10m
2026-06-16 DLH754 FRA → BLR Jun 16, 11:35 UTCJun 16, 18:29 UTC6h 55m
2026-06-15 DLH471 YYZ → FRA Jun 15, 23:15 UTCJun 16, 06:04 UTC6h 50m
2026-06-15 DLH470 FRA → YYZ Jun 15, 12:55 UTCJun 15, 20:30 UTC7h 35m
2026-06-14 DLH493 - Jun 14, 23:35 UTCJun 15, 08:29 UTC8h 55m
2026-06-14 DLH492 FRA → YVR Jun 14, 12:05 UTCJun 14, 21:20 UTC9h 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 D-ABVY page for operator, model, and routing details .

Mode-S 3C4AD9 frequently asked

What is Mode-S code 3C4AD9?
3C4AD9 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ABVY.
Where is Mode-S 3C4AD9 registered?
Mode-S code 3C4AD9 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C4AD9 broadcasting right now?
No active broadcast right now. Last signal was 1d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C4AD9, octal 17045331, decimal 3,951,321.
What flights does 3C4AD9 operate?
Mode-S 3C4AD9 has broadcast 16 distinct callsigns, including DLH754, DLH780, DLH755, DLH781, DLH441.