Apparatus

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sensors Mode-S transponder

3C4A15

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ABPU · BOEING 787-9 Dreamliner

Hex
3C4A15
Octal
17045025
Decimal
3,951,125
Country
DE
Tail
D-ABPU
Type
B789
No current signal · last broadcast 3h ago
Flights observed
160
Distinct callsigns
20
Country
DE
Last broadcast
3h ago

Last known position

Most recent position reported by Mode-S 3C4A15.

Country allocation

The ICAO 24-bit address 3C4A15 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 20 distinct

Callsign Airline Flights Last seen
DLH797 Lufthansa 28 2026-07-01
DLH796 Lufthansa 26 2026-06-30
DLH729 - 13 2026-06-28
DLH451 - 7 2026-07-13
DLH450 - 7 2026-07-12
DLH760 Lufthansa 6 2026-06-04
DLH469 - 6 2026-07-08
DLH468 - 6 2026-07-08
DLH761 Lufthansa 5 2026-06-04
DLH753 - 5 2026-06-20
DLH471 Lufthansa 5 2026-05-25
DLH470 Lufthansa 5 2026-05-25
DLH728 - 4 2026-06-28
DLH576 - 4 2026-07-13
DLH543 Lufthansa 4 2026-06-25
DLH542 - 4 2026-06-24
DLH577 - 3 2026-07-11
DLH501 Lufthansa 3 2026-06-13
DLH500 Lufthansa 3 2026-06-12
DLH9926 Lufthansa 2 2026-04-14

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 DLH576 FRA → CPT Jul 13, 20:40 UTCJul 14, 07:15 UTC10h 35m
2026-07-13 DLH451 - Jul 13, 01:50 UTCJul 13, 11:55 UTC10h 5m
2026-07-12 DLH450 - Jul 12, 12:25 UTCJul 12, 23:20 UTC10h 55m
2026-07-11 DLH577 - Jul 11, 16:15 UTCJul 12, 03:15 UTC11h 0m
2026-07-10 DLH576 FRA → CPT Jul 10, 20:35 UTCJul 11, 07:05 UTC10h 30m
2026-07-10 DLH451 - Jul 10, 01:55 UTCJul 10, 12:05 UTC10h 10m
2026-07-09 DLH450 - Jul 9, 12:15 UTCJul 9, 23:10 UTC10h 55m
2026-07-08 DLH469 - Jul 8, 21:25 UTCJul 9, 06:40 UTC9h 15m
2026-07-08 DLH468 FRA → AUS Jul 8, 08:40 UTCJul 8, 18:50 UTC10h 10m
2026-07-06 DLH451 - Jul 6, 02:00 UTCJul 6, 12:05 UTC10h 5m
2026-07-05 DLH450 - Jul 5, 12:25 UTCJul 5, 23:20 UTC10h 55m
2026-07-04 DLH469 AUS → FRA Jul 4, 21:40 UTCJul 5, 06:45 UTC9h 5m
2026-07-04 DLH468 FRA → AUS Jul 4, 08:40 UTCJul 4, 18:50 UTC10h 10m
2026-07-03 DLH577 CPT → FRA Jul 3, 16:20 UTCJul 4, 03:10 UTC10h 50m
2026-07-02 DLH576 FRA → CPT Jul 2, 20:55 UTCJul 3, 07:30 UTC10h 35m
2026-07-02 DLH6EE MUC → FRA Jul 2, 16:50 UTCJul 2, 17:30 UTC40m
2026-07-02 DLH4MW BER → FRA Jul 2, 14:50 UTCJul 2, 15:25 UTC35m
2026-07-02 DLH107 MUC → FRA Jul 2, 12:35 UTCJul 2, 13:10 UTC35m
2026-07-02 DLH7JF FRA → MUC Jul 2, 11:00 UTCJul 2, 11:35 UTC35m
2026-07-02 DLH2VU - Jul 2, 08:50 UTCJul 2, 09:30 UTC40m
2026-07-02 DLH9XK - Jul 2, 06:55 UTCJul 2, 07:40 UTC45m
2026-07-01 DLH797 HKG → FRA Jul 1, 00:20 UTCJul 1, 04:25 UTC4h 5m
2026-06-30 DLH797 HKG → FRA Jun 30, 16:05 UTCJun 30, 16:15 UTC10m
2026-06-30 DLH796 FRA → HKG Jun 30, 06:35 UTCJun 30, 07:15 UTC40m
2026-06-29 DLH796 FRA → HKG Jun 29, 20:15 UTCJun 30, 00:00 UTC3h 45m
2026-06-28 DLH729 - Jun 28, 23:14 UTCJun 29, 16:29 UTC17h 15m
2026-06-28 DLH729 - Jun 28, 17:34 UTCJun 29, 16:29 UTC22h 55m
2026-06-28 DLH729 - Jun 28, 15:20 UTCJun 29, 15:14 UTC23h 55m
2026-06-28 DLH728 - Jun 28, 14:09 UTCJun 29, 13:14 UTC23h 5m
2026-06-27 DLH569 FRA → FRA Jun 27, 10:40 UTCJun 28, 04:50 UTC18h 10m
2026-06-26 DLH577 CPT → FRA Jun 26, 17:15 UTCJun 27, 04:24 UTC11h 10m
2026-06-25 DLH576 FRA → CPT Jun 25, 20:54 UTCJun 26, 07:10 UTC10h 15m
2026-06-25 DLH543 BOG → FRA Jun 25, 06:00 UTCJun 25, 14:59 UTC9h 0m
2026-06-24 DLH542 - Jun 24, 13:20 UTCJun 25, 13:14 UTC23h 55m
2026-06-22 DLH797 HKG → FRA Jun 22, 18:30 UTCJun 23, 04:05 UTC9h 35m
2026-06-22 DLH797 HKG → FRA Jun 22, 15:54 UTCJun 22, 16:14 UTC20m
2026-06-22 DLH796 FRA → HKG Jun 22, 06:29 UTCJun 22, 07:04 UTC35m
2026-06-21 DLH796 FRA → HKG Jun 21, 20:09 UTCJun 21, 23:50 UTC3h 40m
2026-06-20 DLH753 - Jun 20, 13:19 UTCJun 21, 07:34 UTC18h 15m
2026-06-20 DLH753 FRA → FRA Jun 20, 12:30 UTCJun 21, 07:34 UTC19h 5m
2026-06-19 DLH451 LAX → FRA Jun 19, 02:09 UTCJun 19, 12:34 UTC10h 25m
2026-06-18 DLH450 FRA → LAX Jun 18, 13:00 UTCJun 18, 23:55 UTC10h 55m
2026-06-16 DLH797 HKG → FRA Jun 16, 23:50 UTCJun 17, 04:10 UTC4h 20m
2026-06-16 DLH797 HKG → FRA Jun 16, 15:55 UTCJun 16, 16:10 UTC15m
2026-06-16 DLH796 FRA → HKG Jun 16, 06:40 UTCJun 16, 07:15 UTC35m
2026-06-15 DLH796 FRA → HKG Jun 15, 20:10 UTCJun 15, 23:39 UTC3h 30m
2026-06-15 DLH451 LAX → FRA Jun 15, 01:59 UTCJun 15, 12:19 UTC10h 20m
2026-06-14 DLH450 FRA → LAX Jun 14, 12:25 UTCJun 14, 23:10 UTC10h 44m
2026-06-13 DLH501 GIG → MUC Jun 13, 19:30 UTCJun 14, 06:20 UTC10h 50m
2026-06-12 DLH500 MUC → GIG Jun 12, 20:45 UTCJun 13, 07:45 UTC10h 59m

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

Mode-S 3C4A15 frequently asked

What is Mode-S code 3C4A15?
3C4A15 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ABPU.
Where is Mode-S 3C4A15 registered?
Mode-S code 3C4A15 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C4A15 broadcasting right now?
No active broadcast right now. Last signal was 3h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C4A15, octal 17045025, decimal 3,951,125.
What flights does 3C4A15 operate?
Mode-S 3C4A15 has broadcast 20 distinct callsigns, including DLH797, DLH796, DLH729, DLH451, DLH450.