Apparatus

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sensors Mode-S transponder

3C7439

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AMAY · BOEING 737 MAX 8

Hex
3C7439
Octal
17072071
Decimal
3,961,913
Country
DE
Tail
D-AMAY
Type
B38M
Broadcasting now · callsign TUI6HV · 40,000 ft
Flights observed
347
Distinct callsigns
20
Country
DE
Last broadcast
2h ago

Current position

3C7439 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C7439 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
TUI2DJ TUIfly 29 2026-05-30
TUI23X TUIfly 29 2026-05-29
TUI2XA - 14 2026-05-28
TUI32H TUIfly 12 2026-05-25
TUI4D TUIfly 11 2026-05-24
TUI8L TUIfly 10 2026-05-29
TUI4YJ TUIfly 8 2026-05-25
TUI68K TUIfly 7 2026-05-27
TUI1AG TUIfly 7 2026-06-14
TUI10D TUIfly 7 2026-05-27
TUI7WT - 6 2026-07-11
TUI5HJ - 6 2026-06-14
TUI98Y - 5 2026-07-12
TUI8XD - 5 2026-07-14
TUI8FH TUIfly 5 2026-05-02
TUI7NX - 5 2026-07-07
TUI7CX - 5 2026-07-12
TUI6G TUIfly 5 2026-06-12
TUI60A TUIfly 5 2026-05-12
TUI3NG - 5 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TUI8XD - Jul 14, 02:30 UTCJul 14, 04:20 UTC1h 50m
2026-07-13 TUI5E - Jul 13, 19:20 UTCJul 13, 23:10 UTC3h 50m
2026-07-13 TUI1A - Jul 13, 13:00 UTCJul 13, 17:30 UTC4h 30m
2026-07-13 TUI3WM - Jul 13, 07:30 UTCJul 13, 10:40 UTC3h 10m
2026-07-13 TUI3AY HAJ → KGS Jul 13, 03:15 UTCJul 13, 06:05 UTC2h 50m
2026-07-12 TUI98Y - Jul 12, 20:05 UTCJul 12, 22:55 UTC2h 50m
2026-07-12 TUI7CX - Jul 12, 15:50 UTCJul 12, 18:40 UTC2h 50m
2026-07-12 TUI5E - Jul 12, 10:40 UTCJul 12, 14:25 UTC3h 45m
2026-07-12 TUI1A - Jul 12, 04:25 UTCJul 12, 08:45 UTC4h 20m
2026-07-11 TUI7WT - Jul 11, 10:30 UTCJul 12, 01:05 UTC14h 35m
2026-07-11 TUI6HV - Jul 11, 06:50 UTCJul 11, 09:00 UTC2h 10m
2026-07-11 TUI8XD - Jul 11, 02:55 UTCJul 11, 04:50 UTC1h 55m
2026-07-10 TUI8YH - Jul 10, 23:15 UTCJul 11, 01:40 UTC2h 25m
2026-07-10 TUI9FL - Jul 10, 19:55 UTCJul 10, 21:55 UTC2h 0m
2026-07-10 TUI6GX GPA → HAJ Jul 10, 15:15 UTCJul 10, 17:35 UTC2h 20m
2026-07-10 TUI4MG HAJ → GPA Jul 10, 11:35 UTCJul 10, 13:55 UTC2h 20m
2026-07-10 TUI3FB - Jul 10, 07:05 UTCJul 10, 09:20 UTC2h 15m
2026-07-10 TUI3NG - Jul 10, 04:30 UTCJul 10, 05:40 UTC1h 10m
2026-07-10 TUI3NG - Jul 10, 03:35 UTCJul 10, 04:25 UTC50m
2026-07-09 TUI6HA - Jul 9, 18:15 UTCJul 9, 21:20 UTC3h 5m
2026-07-09 TUI6HA - Jul 9, 17:15 UTCJul 9, 18:10 UTC55m
2026-07-09 TUI36E - Jul 9, 11:10 UTCJul 9, 15:35 UTC4h 25m
2026-07-09 TUI98Y - Jul 9, 06:40 UTCJul 9, 09:50 UTC3h 10m
2026-07-09 TUI7CX - Jul 9, 02:15 UTCJul 9, 04:50 UTC2h 35m
2026-07-08 TUI20K - Jul 8, 17:50 UTCJul 8, 21:45 UTC3h 55m
2026-07-08 TUI3KD - Jul 8, 12:20 UTCJul 8, 16:30 UTC4h 10m
2026-07-08 TUI6DT RHO → HAJ Jul 8, 07:25 UTCJul 8, 10:45 UTC3h 20m
2026-07-08 TUI3YJ FRA → RHO Jul 8, 03:15 UTCJul 8, 05:55 UTC2h 40m
2026-07-07 TUI7NX - Jul 7, 15:35 UTCJul 7, 19:35 UTC4h 0m
2026-07-07 TUI2HE - Jul 7, 10:20 UTCJul 7, 14:10 UTC3h 50m
2026-07-07 TUI1KN - Jul 7, 06:40 UTCJul 7, 08:45 UTC2h 5m
2026-07-07 TUI3WL - Jul 7, 03:45 UTCJul 7, 05:25 UTC1h 40m
2026-07-06 TUI7TN LPA → FRA Jul 6, 16:10 UTCJul 6, 20:15 UTC4h 5m
2026-07-06 TUI2WD - Jul 6, 10:20 UTCJul 6, 14:30 UTC4h 10m
2026-07-06 TUI1KN - Jul 6, 07:00 UTCJul 6, 09:00 UTC2h 0m
2026-07-06 TUI3WL - Jul 6, 03:50 UTCJul 6, 05:30 UTC1h 40m
2026-07-05 TUI60N - Jul 5, 16:25 UTCJul 5, 20:10 UTC3h 45m
2026-07-05 TUI43E - Jul 5, 12:00 UTCJul 5, 15:10 UTC3h 10m
2026-07-05 TUI6MB - Jul 5, 07:10 UTCJul 5, 10:05 UTC2h 55m
2026-07-05 TUI18H - Jul 5, 03:05 UTCJul 5, 05:25 UTC2h 20m
2026-07-04 TUI7NX - Jul 4, 16:00 UTCJul 4, 19:45 UTC3h 45m
2026-07-04 TUI2HE - Jul 4, 10:25 UTCJul 4, 14:20 UTC3h 55m
2026-07-04 TUI8DB CFU → FRA Jul 4, 06:50 UTCJul 4, 08:55 UTC2h 5m
2026-07-04 TUI76M FRA → CFU Jul 4, 03:20 UTCJul 4, 04:55 UTC1h 35m
2026-07-03 TUI7NX - Jul 3, 17:15 UTCJul 3, 20:20 UTC3h 5m
2026-07-03 TUI7NX - Jul 3, 16:25 UTCJul 3, 17:10 UTC45m
2026-07-03 TUI2HE - Jul 3, 10:50 UTCJul 3, 14:50 UTC4h 0m
2026-07-03 TUI1FA GPA → FRA Jul 3, 06:45 UTCJul 3, 09:00 UTC2h 15m
2026-07-03 TUI5JN FRA → GPA Jul 3, 03:10 UTCJul 3, 05:05 UTC1h 55m
2026-07-02 TUI97A FRA → FRA Jul 2, 10:50 UTCJul 2, 20:50 UTC10h 0m

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

Mode-S 3C7439 frequently asked

What is Mode-S code 3C7439?
3C7439 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AMAY.
Where is Mode-S 3C7439 registered?
Mode-S code 3C7439 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C7439 broadcasting right now?
Yes. Mode-S 3C7439 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C7439, octal 17072071, decimal 3,961,913.
What flights does 3C7439 operate?
Mode-S 3C7439 has broadcast 20 distinct callsigns, including TUI2DJ, TUI23X, TUI2XA, TUI32H, TUI4D.