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 TUI18H · 39,000 ft
Flights observed
176
Distinct callsigns
20
Country
DE
Last broadcast
45m 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 TUIfly 11 2026-05-30
TUI6MB TUIfly 9 2026-05-18
TUI1KN TUIfly 9 2026-05-28
TUI3WL TUIfly 8 2026-05-23
TUI3NG TUIfly 8 2026-05-25
TUI6HA TUIfly 7 2026-04-23
TUI3LH TUIfly 7 2026-05-29
TUI36E TUIfly 7 2026-04-23
TUI7CX TUIfly 6 2026-05-02
TUI6YL TUIfly 6 2026-05-29
TUI3FB TUIfly 6 2026-05-14
TUI9MD TUIfly 5 2026-05-14
TUI98Y TUIfly 5 2026-04-30
TUI7VE TUIfly 5 2026-05-14
TUI6DT TUIfly 4 2026-05-24
TUI2WD TUIfly 4 2026-05-28
TUI99J TUIfly 3 2026-05-24
TUI7TN TUIfly 3 2026-05-28
TUI6AK TUIfly 3 2026-05-20
TUI3YJ - 3 2026-05-16

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-30 TUI18H FRA → HER May 30, 03:30 UTCMay 30, 04:15 UTC45m
2026-05-29 TUI119 DLM → FRA May 29, 17:15 UTCMay 29, 20:05 UTC2h 50m
2026-05-29 TUI18Y FRA → DLM May 29, 13:20 UTCMay 29, 15:50 UTC2h 30m
2026-05-29 TUI6YL KGS → FRA May 29, 07:45 UTCMay 29, 10:40 UTC2h 55m
2026-05-29 TUI3LH TRS → FRA May 29, 03:40 UTCMay 29, 06:20 UTC2h 40m
2026-05-28 TUI7TN LPA → FRA May 28, 17:15 UTCMay 28, 21:10 UTC3h 55m
2026-05-28 TUI2WD FRA → LPA May 28, 11:30 UTCMay 28, 15:25 UTC3h 55m
2026-05-28 TUI1KN PMI → FRA May 28, 07:00 UTCMay 28, 08:55 UTC1h 55m
2026-05-28 TUI2DJ STR → PMI May 28, 04:05 UTCMay 28, 05:40 UTC1h 35m
2026-05-27 TUI7GM HER → STR May 27, 16:50 UTCMay 27, 19:30 UTC2h 40m
2026-05-27 TUI7DG STR → HER May 27, 13:05 UTCMay 27, 15:30 UTC2h 25m
2026-05-27 TUI92B XRY → STR May 27, 08:05 UTCMay 27, 10:35 UTC2h 30m
2026-05-27 TUI61X STR → XRY May 27, 04:04 UTCMay 27, 06:40 UTC2h 35m
2026-05-26 TUI60A HRG → STR May 26, 10:05 UTCMay 26, 19:45 UTC9h 40m
2026-05-26 TUI23X PMI → STR May 26, 06:59 UTCMay 26, 08:34 UTC1h 35m
2026-05-26 TUI2DJ STR → PMI May 26, 04:10 UTCMay 26, 05:45 UTC1h 35m
2026-05-25 TUI8L LPA → STR May 25, 17:10 UTCMay 25, 21:09 UTC3h 59m
2026-05-25 TUI4D STR → LPA May 25, 11:45 UTCMay 25, 15:35 UTC3h 50m
2026-05-25 TUI23X PMI → STR May 25, 08:15 UTCMay 25, 10:05 UTC1h 50m
2026-05-25 TUI3NG HAJ → PMI May 25, 04:35 UTCMay 25, 06:40 UTC2h 5m
2026-05-24 TUI6DT ACE → HAJ May 24, 17:10 UTCMay 24, 20:15 UTC3h 5m
2026-05-24 TUI99J HAJ → RHO May 24, 12:50 UTCMay 24, 15:45 UTC2h 55m
2026-05-23 TUI2EA TFS → FRA May 23, 18:50 UTCMay 23, 23:10 UTC4h 20m
2026-05-23 TUI7VB FRA → TFS May 23, 11:05 UTCMay 23, 15:20 UTC4h 15m
2026-05-23 TUI1KN PMI → FRA May 23, 07:10 UTCMay 23, 09:05 UTC1h 55m
2026-05-23 TUI3WL RHO → DUS May 23, 04:00 UTCMay 23, 05:50 UTC1h 50m
2026-05-22 TUI119 DLM → FRA May 22, 16:55 UTCMay 22, 19:55 UTC3h 0m
2026-05-22 TUI18Y FRA → DLM May 22, 12:45 UTCMay 22, 15:30 UTC2h 45m
2026-05-22 TUI6YL KGS → FRA May 22, 07:40 UTCMay 22, 10:40 UTC3h 0m
2026-05-22 TUI3LH TRS → FRA May 22, 03:40 UTCMay 22, 06:25 UTC2h 45m
2026-05-21 TUI7TN LPA → FRA May 21, 16:35 UTCMay 21, 20:30 UTC3h 55m
2026-05-21 TUI2WD FRA → LPA May 21, 10:55 UTCMay 21, 14:55 UTC4h 0m
2026-05-21 TUI1KN PMI → FRA May 21, 06:50 UTCMay 21, 08:55 UTC2h 5m
2026-05-21 TUI3WL RHO → DUS May 21, 03:50 UTCMay 21, 05:25 UTC1h 35m
2026-05-20 TUI6AK DJE → FRA May 20, 11:25 UTCMay 20, 17:55 UTC6h 30m
2026-05-20 TUI9PE - May 20, 06:55 UTCMay 20, 09:35 UTC2h 40m
2026-05-20 TUI28B - May 20, 03:25 UTCMay 20, 05:30 UTC2h 6m
2026-05-19 TUI69E HRG → FRA May 19, 10:45 UTCMay 19, 20:55 UTC10h 10m
2026-05-19 TUI1KN PMI → FRA May 19, 06:55 UTCMay 19, 08:50 UTC1h 55m
2026-05-19 TUI3WL RHO → DUS May 19, 03:50 UTCMay 19, 05:35 UTC1h 45m
2026-05-18 TUI6YL KGS → FRA May 18, 17:30 UTCMay 18, 20:15 UTC2h 44m
2026-05-18 TUI3LH TRS → FRA May 18, 13:35 UTCMay 18, 16:10 UTC2h 35m
2026-05-18 TUI6MB HER → FRA May 18, 09:05 UTCMay 18, 12:05 UTC3h 0m
2026-05-18 TUI18H FRA → HER May 18, 05:00 UTCMay 18, 07:30 UTC2h 30m
2026-05-17 TUI1FY FRA → ACE May 17, 11:01 UTCMay 17, 20:15 UTC9h 15m
2026-05-17 TUI6JG MAH → FRA May 17, 06:50 UTCMay 17, 08:25 UTC1h 35m
2026-05-17 TUI87J FRA → MAH May 17, 03:45 UTCMay 17, 05:15 UTC1h 30m
2026-05-16 TUI58V RHO → FRA May 16, 16:55 UTCMay 16, 20:00 UTC3h 5m
2026-05-16 TUI3YJ FRA → RHO May 16, 12:50 UTCMay 16, 15:35 UTC2h 45m
2026-05-16 TUI6YL KGS → FRA May 16, 08:31 UTCMay 16, 11:25 UTC2h 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-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, TUI1KN, TUI3WL, TUI3NG.