Apparatus

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sensors Mode-S transponder

3C0CA3

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ATUK · BOEING 737-800

Hex
3C0CA3
Octal
17006243
Decimal
3,935,395
Country
DE
Tail
D-ATUK
Type
B738
Broadcasting now · callsign TUI85N · 37,000 ft
Flights observed
304
Distinct callsigns
20
Country
DE
Last broadcast
37m ago

Current position

3C0CA3 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C0CA3 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
TUI1A - 9 2026-06-17
TUI3MC - 8 2026-07-07
TUI7KT - 7 2026-07-07
TUI6HA TUIfly 7 2026-06-13
TUI5E TUIfly 7 2026-06-10
TUI4KT TUIfly 7 2026-06-16
TUI36E TUIfly 7 2026-06-13
TUI3NG - 6 2026-06-18
TUI3FB TUIfly 6 2026-06-16
TUI9XJ - 5 2026-07-06
TUI98Y TUIfly 5 2026-06-11
TUI8EA - 5 2026-07-02
TUI4D TUIfly 5 2026-05-04
TUI3JD TUIfly 5 2026-06-16
TUI35X - 5 2026-07-02
TUI99J - 4 2026-06-13
TUI7CX TUIfly 4 2026-06-11
TUI6DT TUIfly 4 2026-06-13
TUI5NX - 4 2026-07-06
TUI5AL - 4 2026-07-07

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TUI85N - Jul 14, 12:10 UTCJul 14, 14:45 UTC2h 35m
2026-07-14 TUI2FC - Jul 14, 08:15 UTCJul 14, 10:40 UTC2h 25m
2026-07-14 TUI87W - Jul 14, 04:15 UTCJul 14, 06:20 UTC2h 5m
2026-07-13 TUI2FC - Jul 13, 15:50 UTCJul 13, 18:20 UTC2h 30m
2026-07-13 TUI87W - Jul 13, 12:05 UTCJul 13, 14:15 UTC2h 10m
2026-07-13 TUI1TX RHO → MUC Jul 13, 08:05 UTCJul 13, 10:55 UTC2h 50m
2026-07-13 TUI45C MUC → RHO Jul 13, 04:15 UTCJul 13, 06:40 UTC2h 25m
2026-07-12 TUI3PX - Jul 12, 17:50 UTCJul 12, 20:35 UTC2h 45m
2026-07-12 TUI85N - Jul 12, 12:05 UTCJul 12, 15:25 UTC3h 20m
2026-07-12 TUI2FC - Jul 12, 07:40 UTCJul 12, 10:10 UTC2h 30m
2026-07-12 TUI87W - Jul 12, 04:15 UTCJul 12, 06:35 UTC2h 20m
2026-07-11 TUI4ML - Jul 11, 17:05 UTCJul 11, 20:45 UTC3h 40m
2026-07-11 TUI37H - Jul 11, 10:45 UTCJul 11, 15:05 UTC4h 20m
2026-07-11 TUI6LH - Jul 11, 07:45 UTCJul 11, 09:20 UTC1h 35m
2026-07-11 TUI5TE - Jul 11, 04:30 UTCJul 11, 05:50 UTC1h 20m
2026-07-10 TUI74N MUC → MUC Jul 10, 11:45 UTCJul 10, 20:55 UTC9h 10m
2026-07-10 TUI123 - Jul 10, 07:40 UTCJul 10, 10:25 UTC2h 45m
2026-07-10 TUI64G - Jul 10, 04:05 UTCJul 10, 06:20 UTC2h 15m
2026-07-09 TUI4ML - Jul 9, 17:05 UTCJul 9, 20:55 UTC3h 50m
2026-07-09 TUI37H - Jul 9, 10:55 UTCJul 9, 15:05 UTC4h 10m
2026-07-09 TUI3VJ MAH → MUC Jul 9, 07:40 UTCJul 9, 09:25 UTC1h 45m
2026-07-09 TUI31M DUS → MAH Jul 9, 04:10 UTCJul 9, 06:05 UTC1h 55m
2026-07-08 TUI5355 - Jul 8, 18:20 UTCJul 8, 20:55 UTC2h 35m
2026-07-08 TUI5354 - Jul 8, 15:05 UTCJul 8, 17:15 UTC2h 10m
2026-07-08 TUI1VK - Jul 8, 09:40 UTCJul 8, 13:35 UTC3h 55m
2026-07-08 TUI6NH - Jul 8, 04:20 UTCJul 8, 08:10 UTC3h 50m
2026-07-07 TUI21W - Jul 7, 17:10 UTCJul 7, 19:15 UTC2h 5m
2026-07-07 TUI5AL - Jul 7, 14:00 UTCJul 7, 15:50 UTC1h 50m
2026-07-07 TUI3MC - Jul 7, 09:15 UTCJul 7, 12:55 UTC3h 40m
2026-07-07 TUI7KT DUS → RHO Jul 7, 04:20 UTCJul 7, 07:10 UTC2h 50m
2026-07-06 TUI9XJ - Jul 6, 16:50 UTCJul 6, 20:40 UTC3h 50m
2026-07-06 TUI3LN - Jul 6, 11:05 UTCJul 6, 15:10 UTC4h 5m
2026-07-06 TUI5NX IBZ → DUS Jul 6, 07:20 UTCJul 6, 09:35 UTC2h 15m
2026-07-06 TUI4DN DUS → IBZ Jul 6, 04:25 UTCJul 6, 06:25 UTC2h 0m
2026-07-05 TUI6G LPA → DUS Jul 5, 16:45 UTCJul 5, 20:45 UTC4h 0m
2026-07-05 TUI2B - Jul 5, 11:05 UTCJul 5, 15:10 UTC4h 5m
2026-07-05 TUI21W - Jul 5, 07:50 UTCJul 5, 09:55 UTC2h 5m
2026-07-05 TUI5AL - Jul 5, 04:15 UTCJul 5, 06:20 UTC2h 5m
2026-07-04 TUI5NX IBZ → DUS Jul 4, 18:20 UTCJul 4, 20:35 UTC2h 15m
2026-07-04 TUI4DN - Jul 4, 15:00 UTCJul 4, 17:00 UTC2h 0m
2026-07-04 TUI9XJ - Jul 4, 10:05 UTCJul 4, 13:55 UTC3h 50m
2026-07-04 TUI3LN - Jul 4, 04:40 UTCJul 4, 08:40 UTC4h 0m
2026-07-03 TUI9XJ - Jul 3, 09:55 UTCJul 3, 13:50 UTC3h 55m
2026-07-03 TUI3LN - Jul 3, 04:25 UTCJul 3, 07:25 UTC3h 0m
2026-07-02 TUI8EA - Jul 2, 17:50 UTCJul 2, 20:45 UTC2h 55m
2026-07-02 TUI35X - Jul 2, 13:30 UTCJul 2, 16:20 UTC2h 50m
2026-07-02 TUI3MC - Jul 2, 08:35 UTCJul 2, 12:00 UTC3h 25m
2026-07-02 TUI7KT - Jul 2, 04:05 UTCJul 2, 07:10 UTC3h 5m
2026-07-01 TUI3XN FNC → DUS Jul 1, 14:40 UTCJul 1, 18:20 UTC3h 40m
2026-07-01 TUI56C - Jul 1, 11:55 UTCJul 1, 13:25 UTC1h 30m

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

Mode-S 3C0CA3 frequently asked

What is Mode-S code 3C0CA3?
3C0CA3 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ATUK.
Where is Mode-S 3C0CA3 registered?
Mode-S code 3C0CA3 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C0CA3 broadcasting right now?
Yes. Mode-S 3C0CA3 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C0CA3, octal 17006243, decimal 3,935,395.
What flights does 3C0CA3 operate?
Mode-S 3C0CA3 has broadcast 20 distinct callsigns, including TUI1A, TUI3MC, TUI7KT, TUI6HA, TUI5E.