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 Jul 26, 20:20 UTC
Flights observed
391
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 20:20 UTC

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 TUIfly 14 2026-07-20
TUI1AG TUIfly 12 2026-07-20
TUI3WL TUIfly 11 2026-07-22
TUI1KN - 10 2026-07-09
TUI5GY TUIfly 9 2026-06-02
TUI6JG TUIfly 8 2026-07-26
TUI3CT TUIfly 8 2026-07-21
TUI7TN TUIfly 7 2026-07-25
TUI5AL - 7 2026-07-06
TUI56C TUIfly 7 2026-07-21
TUI3XN - 7 2026-07-19
TUI2WD TUIfly 7 2026-07-25
TUI2B - 7 2026-07-04
TUI21W - 7 2026-07-06
TUI8949 TUIfly 6 2026-04-16
TUI87J TUIfly 6 2026-07-26
TUI6G TUIfly 6 2026-07-04
TUI58V - 6 2026-06-11
TUI3YJ - 6 2026-06-11
TUI3LN TUIfly 6 2026-05-02

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TUI81V ACE → FRA Jul 26, 16:25 UTCJul 26, 20:15 UTC3h 50m
2026-07-26 TUI1FY FRA → ACE Jul 26, 10:55 UTCJul 26, 14:20 UTC3h 25m
2026-07-26 TUI6JG MAH → FRA Jul 26, 06:35 UTCJul 26, 08:20 UTC1h 45m
2026-07-26 TUI87J FRA → MAH Jul 26, 03:45 UTCJul 26, 05:20 UTC1h 35m
2026-07-25 TUI7TN LPA → FRA Jul 25, 17:50 UTCJul 25, 21:30 UTC3h 40m
2026-07-25 TUI2WD FRA → LPA Jul 25, 10:45 UTCJul 25, 14:50 UTC4h 5m
2026-07-25 TUI8DB CFU → FRA Jul 25, 07:05 UTCJul 25, 09:00 UTC1h 55m
2026-07-25 TUI76M FRA → CFU Jul 25, 03:15 UTCJul 25, 04:50 UTC1h 35m
2026-07-24 TUI7NX FUE → FRA Jul 24, 10:55 UTCJul 24, 20:20 UTC9h 25m
2026-07-24 TUI1FA GPA → FRA Jul 24, 06:40 UTCJul 24, 09:00 UTC2h 20m
2026-07-24 TUI5JN FRA → GPA Jul 24, 03:05 UTCJul 24, 04:50 UTC1h 45m
2026-07-23 TUI69E HRG → FRA Jul 23, 10:15 UTCJul 23, 20:05 UTC9h 50m
2026-07-23 TUI6JG MAH → FRA Jul 23, 07:05 UTCJul 23, 08:55 UTC1h 50m
2026-07-23 TUI87J FRA → MAH Jul 23, 03:55 UTCJul 23, 05:35 UTC1h 40m
2026-07-22 TUI2EA TFS → FRA Jul 22, 17:30 UTCJul 22, 21:15 UTC3h 45m
2026-07-22 TUI7VB - Jul 22, 11:10 UTCJul 22, 14:55 UTC3h 45m
2026-07-22 TUI3WL RHO → DUS Jul 22, 03:35 UTCJul 22, 05:20 UTC1h 45m
2026-07-21 TUI3CT FNC → FRA Jul 21, 17:45 UTCJul 21, 20:25 UTC2h 40m
2026-07-21 TUI3CT FNC → FRA Jul 21, 16:55 UTCJul 21, 17:10 UTC15m
2026-07-21 TUI56C DUS → FNC Jul 21, 15:20 UTCJul 21, 15:30 UTC10m
2026-07-21 TUI56C DUS → FNC Jul 21, 11:45 UTCJul 21, 14:35 UTC2h 50m
2026-07-21 TUI3FG DUS → HER Jul 21, 07:40 UTCJul 21, 10:05 UTC2h 25m
2026-07-21 TUI44M DUS → CFU Jul 21, 04:15 UTCJul 21, 06:10 UTC1h 55m
2026-07-20 TUI8EA HER → DUS Jul 20, 17:40 UTCJul 20, 20:40 UTC3h 0m
2026-07-20 TUI35X DUS → HER Jul 20, 13:15 UTCJul 20, 16:05 UTC2h 50m
2026-07-20 TUI1AG PMI → DUS Jul 20, 08:00 UTCJul 20, 09:55 UTC1h 55m
2026-07-20 TUI5HJ DUS → PMI Jul 20, 04:15 UTCJul 20, 06:25 UTC2h 10m
2026-07-19 TUI3XN FNC → DUS Jul 19, 17:00 UTCJul 19, 20:30 UTC3h 30m
2026-07-19 TUI4KT - Jul 19, 11:45 UTCJul 19, 15:55 UTC4h 10m
2026-07-19 TUI5GN TRS → HAJ Jul 19, 08:45 UTCJul 19, 10:00 UTC1h 15m
2026-07-19 TUI1KA HAJ → TRS Jul 19, 06:10 UTCJul 19, 07:25 UTC1h 15m
2026-07-18 TUI9MD - Jul 18, 21:00 UTCJul 18, 23:10 UTC2h 10m
2026-07-18 TUI7VE HAJ → PMI Jul 18, 17:10 UTCJul 18, 19:20 UTC2h 10m
2026-07-18 TUI42V IBZ → HAJ Jul 18, 13:50 UTCJul 18, 16:05 UTC2h 15m
2026-07-18 TUI5YJ - Jul 18, 10:10 UTCJul 18, 12:35 UTC2h 25m
2026-07-18 TUI3FB - Jul 18, 06:35 UTCJul 18, 08:35 UTC2h 0m
2026-07-18 TUI3NG HAJ → PMI Jul 18, 03:00 UTCJul 18, 05:25 UTC2h 25m
2026-07-17 TUI3GA FUE → HAJ Jul 17, 17:40 UTCJul 18, 00:04 UTC6h 25m
2026-07-17 TUI6NL - Jul 17, 14:15 UTCJul 17, 17:35 UTC3h 20m
2026-07-17 TUI175 DLM → HAJ Jul 17, 09:50 UTCJul 17, 13:00 UTC3h 10m
2026-07-17 TUI86A HAJ → DLM Jul 17, 05:45 UTCJul 17, 08:25 UTC2h 40m
2026-07-17 TUI8YH - Jul 17, 01:55 UTCJul 17, 04:20 UTC2h 25m
2026-07-16 TUI9FL HAJ → BOJ Jul 16, 22:10 UTCJul 17, 00:20 UTC2h 10m
2026-07-16 TUI90X OPO → HAJ Jul 16, 18:29 UTCJul 16, 20:49 UTC2h 20m
2026-07-16 TUI1PC HAJ → OPO Jul 16, 14:00 UTCJul 16, 16:55 UTC2h 55m
2026-07-16 TUI3FB - Jul 16, 08:50 UTCJul 16, 10:55 UTC2h 5m
2026-07-16 TUI3NG - Jul 16, 05:00 UTCJul 16, 07:15 UTC2h 15m
2026-07-15 TUI823P BRU → DUS Jul 15, 11:15 UTCJul 15, 12:00 UTC45m
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

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 Jul 26, 20:20 UTC.
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.