Apparatus

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sensors Mode-S transponder

3C4A8B

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ABTK · BOEING 747-400

Hex
3C4A8B
Octal
17045213
Decimal
3,951,243
Country
DE
Tail
D-ABTK
Type
B744
No current signal · last broadcast 2h ago
Flights observed
161
Distinct callsigns
14
Country
DE
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 3C4A8B.

Country allocation

The ICAO 24-bit address 3C4A8B 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 14 distinct

Callsign Airline Flights Last seen
DLH754 - 18 2026-07-13
DLH441 - 16 2026-07-08
DLH3CF - 16 2026-07-08
DLH755 - 15 2026-07-13
DLH493 - 13 2026-07-03
DLH423 Lufthansa 13 2026-06-10
DLH7K Lufthansa 12 2026-06-10
DLH492 Lufthansa 12 2026-07-03
DLH455 Lufthansa 9 2026-05-27
DLH781 Lufthansa 8 2026-07-07
DLH780 Lufthansa 8 2026-07-06
DLH471 - 8 2026-07-12
DLH470 - 7 2026-07-14
DLH454 Lufthansa 6 2026-05-27

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 DLH470 - Jul 14, 12:45 UTCJul 14, 14:25 UTC1h 40m
2026-07-13 DLH755 - Jul 13, 21:50 UTCJul 14, 07:00 UTC9h 10m
2026-07-13 DLH754 - Jul 13, 19:30 UTCJul 13, 19:45 UTC15m
2026-07-13 DLH754 - Jul 13, 11:20 UTCJul 13, 18:15 UTC6h 55m
2026-07-12 DLH471 YYZ → FRA Jul 12, 22:35 UTCJul 13, 05:50 UTC7h 15m
2026-07-12 DLH470 FRA → YYZ Jul 12, 12:35 UTCJul 12, 20:05 UTC7h 30m
2026-07-10 DLH755 - Jul 10, 21:55 UTCJul 11, 07:00 UTC9h 5m
2026-07-10 DLH754 - Jul 10, 19:35 UTCJul 10, 19:45 UTC10m
2026-07-10 DLH754 - Jul 10, 11:35 UTCJul 10, 18:15 UTC6h 40m
2026-07-09 DLH755 - Jul 9, 22:45 UTCJul 10, 07:55 UTC9h 10m
2026-07-09 DLH754 - Jul 9, 20:10 UTCJul 9, 20:25 UTC15m
2026-07-09 DLH754 - Jul 9, 12:05 UTCJul 9, 18:55 UTC6h 50m
2026-07-08 DLH441 - Jul 8, 21:05 UTCJul 9, 06:05 UTC9h 0m
2026-07-08 DLH3CF - Jul 8, 08:35 UTCJul 8, 18:45 UTC10h 10m
2026-07-07 DLH781 SIN → FRA Jul 7, 16:10 UTCJul 8, 04:30 UTC12h 20m
2026-07-06 DLH780 FRA → SIN Jul 6, 20:15 UTCJul 7, 08:00 UTC11h 45m
2026-07-05 DLH755 - Jul 5, 22:20 UTCJul 6, 07:15 UTC8h 55m
2026-07-05 DLH754 FRA → BLR Jul 5, 19:40 UTCJul 5, 19:50 UTC10m
2026-07-05 DLH754 FRA → BLR Jul 5, 11:30 UTCJul 5, 18:20 UTC6h 50m
2026-07-04 DLH471 YYZ → FRA Jul 4, 22:50 UTCJul 5, 05:40 UTC6h 50m
2026-07-04 DLH470 FRA → YYZ Jul 4, 12:15 UTCJul 4, 20:10 UTC7h 55m
2026-07-03 DLH493 YVR → FRA Jul 3, 23:40 UTCJul 4, 08:25 UTC8h 45m
2026-07-03 DLH492 FRA → YVR Jul 3, 11:50 UTCJul 3, 21:20 UTC9h 30m
2026-07-02 DLH493 YVR → FRA Jul 2, 23:40 UTCJul 3, 08:25 UTC8h 45m
2026-07-02 DLH492 FRA → YVR Jul 2, 12:00 UTCJul 2, 21:20 UTC9h 20m
2026-07-02 DLH471 - Jul 2, 01:05 UTCJul 2, 06:20 UTC5h 15m
2026-07-01 DLH471 - Jul 1, 23:35 UTCJul 2, 01:00 UTC1h 25m
2026-07-01 DLH470 FRA → YYZ Jul 1, 12:50 UTCJul 1, 20:35 UTC7h 45m
2026-06-30 DLH493 YVR → FRA Jun 30, 23:50 UTCJul 1, 08:50 UTC9h 0m
2026-06-30 DLH492 FRA → YVR Jun 30, 12:35 UTCJun 30, 21:45 UTC9h 10m
2026-06-29 DLH441 - Jun 29, 21:14 UTCJun 30, 06:15 UTC9h 1m
2026-06-29 DLH3CF ARN → FRA Jun 29, 08:54 UTCJun 29, 18:39 UTC9h 45m
2026-06-27 DLH441 - Jun 27, 23:45 UTCJun 28, 08:44 UTC9h 0m
2026-06-27 DLH3CF ARN → FRA Jun 27, 11:09 UTCJun 27, 20:55 UTC9h 45m
2026-06-26 DLH471 YYZ → FRA Jun 26, 23:09 UTCJun 27, 05:59 UTC6h 50m
2026-06-26 DLH470 FRA → YYZ Jun 26, 13:10 UTCJun 26, 20:40 UTC7h 30m
2026-06-26 DLH493 YVR → FRA Jun 26, 00:39 UTCJun 26, 09:39 UTC9h 0m
2026-06-25 DLH492 FRA → YVR Jun 25, 12:54 UTCJun 25, 22:10 UTC9h 15m
2026-06-24 DLH755 - Jun 24, 23:10 UTCJun 25, 07:15 UTC8h 5m
2026-06-24 DLH755 - Jun 24, 22:25 UTCJun 24, 22:35 UTC10m
2026-06-24 DLH754 FRA → BLR Jun 24, 20:05 UTCJun 24, 20:14 UTC10m
2026-06-24 DLH754 FRA → BLR Jun 24, 11:45 UTCJun 24, 18:44 UTC7h 0m
2026-06-22 DLH441 - Jun 22, 22:19 UTCJun 23, 07:09 UTC8h 50m
2026-06-22 DLH3CF ARN → FRA Jun 22, 09:14 UTCJun 22, 19:19 UTC10h 5m
2026-06-21 DLH471 - Jun 21, 04:30 UTCJun 21, 06:19 UTC1h 50m
2026-06-20 DLH471 - Jun 20, 23:29 UTCJun 21, 01:10 UTC1h 40m
2026-06-20 DLH470 FRA → YYZ Jun 20, 13:29 UTCJun 20, 20:45 UTC7h 15m
2026-06-19 DLH471 - Jun 19, 22:49 UTCJun 20, 04:44 UTC5h 55m
2026-06-19 DLH470 FRA → YYZ Jun 19, 12:44 UTCJun 19, 20:09 UTC7h 25m
2026-06-19 DLH493 - Jun 19, 00:34 UTCJun 19, 08:54 UTC8h 20m

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

Mode-S 3C4A8B frequently asked

What is Mode-S code 3C4A8B?
3C4A8B is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ABTK.
Where is Mode-S 3C4A8B registered?
Mode-S code 3C4A8B is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C4A8B broadcasting right now?
No active broadcast right now. Last signal was 2h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C4A8B, octal 17045213, decimal 3,951,243.
What flights does 3C4A8B operate?
Mode-S 3C4A8B has broadcast 14 distinct callsigns, including DLH754, DLH441, DLH3CF, DLH755, DLH493.