Apparatus

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sensors Mode-S transponder

3C7438

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AMAX · BOEING 737 MAX 8

Hex
3C7438
Octal
17072070
Decimal
3,961,912
Country
DE
Tail
D-AMAX
Type
B38M
No current signal · last broadcast 1d ago
Flights observed
343
Distinct callsigns
20
Country
DE
Last broadcast
1d ago

Last known position

Most recent position reported by Mode-S 3C7438.

Country allocation

The ICAO 24-bit address 3C7438 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
TUI5HJ - 13 2026-07-04
TUI1AG - 11 2026-07-04
TUI3WL - 10 2026-07-09
TUI1KN - 10 2026-07-09
TUI5GY TUIfly 9 2026-06-02
TUI5AL - 7 2026-07-06
TUI2B - 7 2026-07-04
TUI21W - 7 2026-07-06
TUI8949 TUIfly 6 2026-04-16
TUI7TN TUIfly 6 2026-07-09
TUI6JG TUIfly 6 2026-06-14
TUI6G TUIfly 6 2026-07-04
TUI58V - 6 2026-06-11
TUI3YJ - 6 2026-06-11
TUI3XN - 6 2026-07-12
TUI3LN TUIfly 6 2026-05-02
TUI3CT - 6 2026-07-07
TUI2WD - 6 2026-07-09
TUI98Y - 5 2026-07-11
TUI7CX TUIfly 5 2026-05-23

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-13 TUI824P ESS → BRU Jul 13, 06:35 UTCJul 13, 07:05 UTC30m
2026-07-12 TUI3XN - Jul 12, 17:10 UTCJul 12, 20:30 UTC3h 20m
2026-07-12 TUI4KT - Jul 12, 11:25 UTCJul 12, 14:45 UTC3h 20m
2026-07-12 TUI5GN TRS → HAJ Jul 12, 08:45 UTCJul 12, 10:01 UTC1h 15m
2026-07-12 TUI1KA HAJ → TRS Jul 12, 06:05 UTCJul 12, 07:20 UTC1h 15m
2026-07-11 TUI6NL HAJ → HAJ Jul 11, 12:30 UTCJul 11, 22:05 UTC9h 35m
2026-07-11 TUI98Y - Jul 11, 07:50 UTCJul 11, 10:50 UTC3h 0m
2026-07-11 TUI18H - Jul 11, 03:25 UTCJul 11, 05:55 UTC2h 30m
2026-07-10 TUI119 - Jul 10, 16:35 UTCJul 10, 19:40 UTC3h 5m
2026-07-10 TUI18Y FRA → DLM Jul 10, 12:40 UTCJul 10, 15:05 UTC2h 25m
2026-07-10 TUI6MB - Jul 10, 07:00 UTCJul 10, 09:55 UTC2h 55m
2026-07-10 TUI18H - Jul 10, 03:00 UTCJul 10, 05:25 UTC2h 25m
2026-07-09 TUI7TN LPA → FRA Jul 9, 16:20 UTCJul 9, 19:55 UTC3h 35m
2026-07-09 TUI2WD - Jul 9, 10:35 UTCJul 9, 14:25 UTC3h 50m
2026-07-09 TUI1KN - Jul 9, 07:05 UTCJul 9, 08:55 UTC1h 50m
2026-07-09 TUI3WL - Jul 9, 03:55 UTCJul 9, 05:35 UTC1h 40m
2026-07-08 TUI5345 - Jul 8, 14:45 UTCJul 8, 17:05 UTC2h 20m
2026-07-08 TUI5344 FRA → BOJ Jul 8, 11:40 UTCJul 8, 13:35 UTC1h 55m
2026-07-08 TUI6AK DJE → FRA Jul 8, 06:40 UTCJul 8, 09:15 UTC2h 35m
2026-07-08 TUI28B FRA → DJE Jul 8, 03:10 UTCJul 8, 05:30 UTC2h 20m
2026-07-07 TUI3CT FNC → FRA Jul 7, 17:10 UTCJul 7, 20:50 UTC3h 40m
2026-07-07 TUI56C - Jul 7, 12:10 UTCJul 7, 15:55 UTC3h 45m
2026-07-07 TUI3FG - Jul 7, 07:50 UTCJul 7, 10:10 UTC2h 20m
2026-07-07 TUI44M - Jul 7, 04:15 UTCJul 7, 06:10 UTC1h 55m
2026-07-06 TUI21W - Jul 6, 15:35 UTCJul 6, 17:40 UTC2h 5m
2026-07-06 TUI5AL - Jul 6, 12:25 UTCJul 6, 14:20 UTC1h 55m
2026-07-06 TUI7YL - Jul 6, 08:00 UTCJul 6, 10:35 UTC2h 35m
2026-07-06 TUI3DH DUS → XRY Jul 6, 04:20 UTCJul 6, 06:55 UTC2h 35m
2026-07-05 TUI3BH - Jul 5, 15:00 UTCJul 5, 18:55 UTC3h 55m
2026-07-05 TUI3BH - Jul 5, 04:35 UTCJul 5, 08:40 UTC4h 5m
2026-07-04 TUI6G LPA → DUS Jul 4, 17:40 UTCJul 4, 21:35 UTC3h 55m
2026-07-04 TUI2B - Jul 4, 11:50 UTCJul 4, 16:15 UTC4h 25m
2026-07-04 TUI1AG - Jul 4, 08:15 UTCJul 4, 10:15 UTC2h 0m
2026-07-04 TUI5HJ - Jul 4, 04:10 UTCJul 4, 06:10 UTC2h 0m
2026-07-03 TUI6G LPA → DUS Jul 3, 16:50 UTCJul 3, 20:50 UTC4h 0m
2026-07-03 TUI2B - Jul 3, 11:00 UTCJul 3, 15:10 UTC4h 10m
2026-07-03 TUI1AG - Jul 3, 07:40 UTCJul 3, 09:40 UTC2h 0m
2026-07-03 TUI5HJ - Jul 3, 04:30 UTCJul 3, 06:25 UTC1h 55m
2026-07-02 TUI3GN HRG → DUS Jul 2, 08:50 UTCJul 2, 19:05 UTC10h 15m
2026-07-01 TUI21W - Jul 1, 19:05 UTCJul 1, 21:20 UTC2h 15m
2026-07-01 TUI5AL - Jul 1, 15:15 UTCJul 1, 17:25 UTC2h 10m
2026-07-01 TUI1VK - Jul 1, 09:25 UTCJul 1, 13:35 UTC4h 10m
2026-07-01 TUI6NH - Jul 1, 04:15 UTCJul 1, 07:45 UTC3h 30m
2026-06-30 TUI49E - Jun 30, 16:40 UTCJun 30, 20:50 UTC4h 10m
2026-06-30 TUI2KM - Jun 30, 10:55 UTCJun 30, 15:05 UTC4h 10m
2026-06-30 TUI1AG - Jun 30, 07:20 UTCJun 30, 09:15 UTC1h 55m
2026-06-30 TUI5HJ - Jun 30, 04:10 UTCJun 30, 06:10 UTC2h 0m
2026-06-29 TUI6G LPA → DUS Jun 29, 14:44 UTCJun 29, 21:05 UTC6h 20m
2026-06-29 TUI2B - Jun 29, 11:20 UTCJun 29, 14:14 UTC2h 55m
2026-06-29 TUI1AG - Jun 29, 07:59 UTCJun 29, 09:54 UTC1h 55m

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

Mode-S 3C7438 frequently asked

What is Mode-S code 3C7438?
3C7438 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AMAX.
Where is Mode-S 3C7438 registered?
Mode-S code 3C7438 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C7438 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 3C7438, octal 17072070, decimal 3,961,912.
What flights does 3C7438 operate?
Mode-S 3C7438 has broadcast 20 distinct callsigns, including TUI5HJ, TUI1AG, TUI3WL, TUI1KN, TUI5GY.