Apparatus

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sensors Mode-S transponder

3C0C99

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ATUA · BOEING 737-800

Hex
3C0C99
Octal
17006231
Decimal
3,935,385
Country
DE
Tail
D-ATUA
Type
B738
Broadcasting now · callsign TUI3WM · 38,000 ft
Flights observed
310
Distinct callsigns
20
Country
DE
Last broadcast
20m ago

Current position

3C0C99 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C0C99 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
TUI18H - 18 2026-07-06
TUI6MB - 17 2026-07-06
TUI3WL - 12 2026-06-25
TUI3NG - 12 2026-07-08
TUI3LH - 12 2026-07-06
TUI1KN - 12 2026-06-25
TUI6YL - 11 2026-07-06
TUI3FB - 11 2026-07-08
TUI36E - 10 2026-07-11
TUI6HA - 9 2026-07-11
TUI7CX - 8 2026-06-20
TUI9MD - 7 2026-07-12
TUI98Y - 7 2026-06-27
TUI7VE - 7 2026-07-12
TUI6DT - 6 2026-07-11
TUI2WD - 6 2026-06-20
TUI1A - 6 2026-06-19
TUI99J - 5 2026-07-11
TUI7TN TUIfly 5 2026-06-20
TUI5E - 5 2026-06-19

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 TUI3WM - Jul 14, 09:40 UTCJul 14, 10:15 UTC35m
2026-07-14 TUI3AY - Jul 14, 05:15 UTCJul 14, 08:00 UTC2h 45m
2026-07-14 TUI8YH - Jul 14, 01:05 UTCJul 14, 03:35 UTC2h 30m
2026-07-13 TUI9FL - Jul 13, 21:50 UTCJul 14, 00:05 UTC2h 15m
2026-07-12 TUI9MD - Jul 12, 08:45 UTCJul 12, 11:01 UTC2h 15m
2026-07-12 TUI7VE - Jul 12, 04:45 UTCJul 12, 07:01 UTC2h 15m
2026-07-11 TUI6HA - Jul 11, 19:50 UTCJul 11, 23:45 UTC3h 55m
2026-07-11 TUI36E - Jul 11, 13:50 UTCJul 11, 18:15 UTC4h 25m
2026-07-11 TUI6DT RHO → HAJ Jul 11, 09:20 UTCJul 11, 12:35 UTC3h 15m
2026-07-11 TUI99J HAJ → RHO Jul 11, 04:50 UTCJul 11, 07:45 UTC2h 55m
2026-07-10 TUI6NL HAJ → HAJ Jul 10, 13:25 UTCJul 10, 23:00 UTC9h 35m
2026-07-10 TUI175 - Jul 10, 08:45 UTCJul 10, 12:00 UTC3h 15m
2026-07-10 TUI86A - Jul 10, 04:30 UTCJul 10, 07:10 UTC2h 40m
2026-07-09 TUI8YH - Jul 9, 23:30 UTCJul 10, 01:50 UTC2h 20m
2026-07-09 TUI9FL - Jul 9, 20:15 UTCJul 9, 22:20 UTC2h 5m
2026-07-09 TUI75D - Jul 9, 15:00 UTCJul 9, 18:50 UTC3h 50m
2026-07-09 TUI6HC - Jul 9, 10:15 UTCJul 9, 13:35 UTC3h 20m
2026-07-09 TUI3BD MAH → HAJ Jul 9, 06:40 UTCJul 9, 08:50 UTC2h 10m
2026-07-09 TUI54T HAJ → MAH Jul 9, 03:15 UTCJul 9, 05:20 UTC2h 5m
2026-07-08 TUI3WM - Jul 8, 15:40 UTCJul 8, 18:55 UTC3h 15m
2026-07-08 TUI3AY - Jul 8, 11:10 UTCJul 8, 13:55 UTC2h 45m
2026-07-08 TUI3FB - Jul 8, 07:40 UTCJul 8, 10:00 UTC2h 20m
2026-07-08 TUI3NG - Jul 8, 04:05 UTCJul 8, 06:05 UTC2h 0m
2026-07-07 TUI3WM - Jul 7, 10:55 UTCJul 7, 14:00 UTC3h 5m
2026-07-07 TUI3AY HAJ → KGS Jul 7, 06:30 UTCJul 7, 09:10 UTC2h 40m
2026-07-07 TUI907P FRA → HAJ Jul 7, 04:05 UTCJul 7, 04:45 UTC40m
2026-07-06 TUI6YL KGS → FRA Jul 6, 17:20 UTCJul 6, 20:15 UTC2h 55m
2026-07-06 TUI3LH FRA → KGS Jul 6, 13:25 UTCJul 6, 16:05 UTC2h 40m
2026-07-06 TUI6MB - Jul 6, 09:00 UTCJul 6, 11:55 UTC2h 55m
2026-07-06 TUI18H - Jul 6, 05:00 UTCJul 6, 07:25 UTC2h 25m
2026-07-06 TUI906P HAJ → FRA Jul 6, 02:30 UTCJul 6, 03:10 UTC40m
2026-07-04 TUI6HA - Jul 4, 20:15 UTCJul 5, 00:40 UTC4h 25m
2026-07-04 TUI36E - Jul 4, 18:10 UTCJul 4, 18:55 UTC45m
2026-07-04 TUI36E - Jul 4, 14:20 UTCJul 4, 17:35 UTC3h 15m
2026-07-04 TUI6DT RHO → HAJ Jul 4, 09:40 UTCJul 4, 13:05 UTC3h 25m
2026-07-04 TUI99J HAJ → RHO Jul 4, 04:45 UTCJul 4, 07:45 UTC3h 0m
2026-07-03 TUI6GX GPA → HAJ Jul 3, 11:45 UTCJul 3, 17:40 UTC5h 55m
2026-07-03 TUI3FB - Jul 3, 07:35 UTCJul 3, 09:50 UTC2h 15m
2026-07-03 TUI3NG - Jul 3, 04:00 UTCJul 3, 06:10 UTC2h 10m
2026-07-02 TUI8YH - Jul 2, 23:20 UTCJul 3, 01:45 UTC2h 25m
2026-07-02 TUI9FL - Jul 2, 19:55 UTCJul 2, 22:05 UTC2h 10m
2026-07-02 TUI75D - Jul 2, 15:00 UTCJul 2, 18:45 UTC3h 45m
2026-07-02 TUI6HC - Jul 2, 10:15 UTCJul 2, 13:45 UTC3h 30m
2026-07-02 TUI3BD MAH → HAJ Jul 2, 06:25 UTCJul 2, 08:40 UTC2h 15m
2026-07-02 TUI54T HAJ → MAH Jul 2, 03:15 UTCJul 2, 05:05 UTC1h 50m
2026-07-01 TUI20K - Jul 1, 19:05 UTCJul 1, 23:25 UTC4h 20m
2026-07-01 TUI3KD - Jul 1, 14:05 UTCJul 1, 18:10 UTC4h 5m
2026-07-01 TUI903P FNC → HAJ Jul 1, 12:15 UTCJul 1, 12:50 UTC35m
2026-07-01 TUI5355 - Jul 1, 08:45 UTCJul 1, 11:05 UTC2h 20m
2026-07-01 TUI5354 - Jul 1, 05:10 UTCJul 1, 07:35 UTC2h 25m

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

Mode-S 3C0C99 frequently asked

What is Mode-S code 3C0C99?
3C0C99 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ATUA.
Where is Mode-S 3C0C99 registered?
Mode-S code 3C0C99 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C0C99 broadcasting right now?
Yes. Mode-S 3C0C99 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C0C99, octal 17006231, decimal 3,935,385.
What flights does 3C0C99 operate?
Mode-S 3C0C99 has broadcast 20 distinct callsigns, including TUI18H, TUI6MB, TUI3WL, TUI3NG, TUI3LH.