Apparatus

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sensors Mode-S transponder

3C618B

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AHLK · BOEING 737-800

Hex
3C618B
Octal
17060613
Decimal
3,957,131
Country
DE
Tail
D-AHLK
Type
B738
Broadcasting now · callsign TUI6MB · 26,000 ft
Flights observed
330
Distinct callsigns
20
Country
DE
Last broadcast
1h ago

Current position

3C618B is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C618B 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
TUI21W - 12 2026-07-15
TUI5AL - 10 2026-07-15
TUI2DJ - 10 2026-07-13
TUI8EA - 9 2026-07-12
TUI5HJ - 9 2026-07-10
TUI35X - 9 2026-07-12
TUI1AG - 9 2026-07-10
TUI7DG TUIfly 7 2026-05-15
TUI3LN - 7 2026-06-19
TUI7GM TUIfly 6 2026-05-15
TUI9XJ - 5 2026-06-19
TUI2B - 5 2026-07-10
TUI23X - 5 2026-07-13
TUI9AG TUIfly 4 2026-06-15
TUI99J - 4 2026-07-16
TUI8XA TUIfly 4 2026-04-14
TUI87W TUIfly 4 2026-05-26
TUI85N TUIfly 4 2026-05-24
TUI73C TUIfly 4 2026-06-14
TUI6YL - 4 2026-06-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 TUI7CX HAJ → HER Jul 18, 02:14 UTCJul 18, 04:45 UTC2h 31m
2026-07-17 TUI5E - Jul 17, 18:34 UTCJul 17, 22:29 UTC3h 55m
2026-07-17 TUI1A - Jul 17, 12:25 UTCJul 17, 16:49 UTC4h 25m
2026-07-17 TUI52N - Jul 17, 07:55 UTCJul 17, 10:55 UTC3h 0m
2026-07-17 TUI9MW HAJ → HER Jul 17, 03:55 UTCJul 17, 06:25 UTC2h 30m
2026-07-16 TUI3GA - Jul 16, 17:14 UTCJul 16, 21:00 UTC3h 45m
2026-07-16 TUI6NL - Jul 16, 11:15 UTCJul 16, 15:30 UTC4h 15m
2026-07-16 TUI6DT RHO → HAJ Jul 16, 06:40 UTCJul 16, 10:00 UTC3h 20m
2026-07-16 TUI99J HAJ → RHO Jul 16, 02:25 UTCJul 16, 05:20 UTC2h 55m
2026-07-15 TUI9MD - Jul 15, 22:40 UTCJul 16, 00:50 UTC2h 10m
2026-07-15 TUI5AL - Jul 15, 18:35 UTCJul 15, 20:30 UTC1h 55m
2026-07-15 TUI21W - Jul 15, 15:15 UTCJul 15, 17:10 UTC1h 55m
2026-07-15 TUI7VE - Jul 15, 11:10 UTCJul 15, 13:25 UTC2h 15m
2026-07-15 TUI7JB - Jul 15, 07:10 UTCJul 15, 10:00 UTC2h 50m
2026-07-15 TUI41W HAJ → FAO Jul 15, 02:50 UTCJul 15, 06:05 UTC3h 15m
2026-07-14 TUI7LE - Jul 14, 11:25 UTCJul 14, 22:05 UTC10h 40m
2026-07-13 TUI9MD - Jul 13, 21:00 UTCJul 13, 23:20 UTC2h 20m
2026-07-13 TUI2DJ - Jul 13, 17:55 UTCJul 13, 19:35 UTC1h 40m
2026-07-13 TUI23X - Jul 13, 15:05 UTCJul 13, 16:40 UTC1h 35m
2026-07-13 TUI7VE - Jul 13, 11:25 UTCJul 13, 13:35 UTC2h 10m
2026-07-13 TUI80J - Jul 13, 07:10 UTCJul 13, 09:50 UTC2h 40m
2026-07-13 TUI6AV HAJ → XRY Jul 13, 02:45 UTCJul 13, 05:50 UTC3h 5m
2026-07-12 TUI56C - Jul 12, 13:10 UTCJul 12, 21:50 UTC8h 40m
2026-07-12 TUI8EA - Jul 12, 08:50 UTCJul 12, 11:50 UTC3h 0m
2026-07-12 TUI35X - Jul 12, 04:35 UTCJul 12, 07:20 UTC2h 45m
2026-07-11 TUI49E - Jul 11, 16:55 UTCJul 11, 20:35 UTC3h 40m
2026-07-11 TUI2KM - Jul 11, 11:00 UTCJul 11, 15:05 UTC4h 5m
2026-07-11 TUI21W - Jul 11, 07:30 UTCJul 11, 09:25 UTC1h 55m
2026-07-11 TUI5AL - Jul 11, 04:05 UTCJul 11, 06:10 UTC2h 5m
2026-07-10 TUI6G LPA → DUS Jul 10, 17:00 UTCJul 10, 20:45 UTC3h 45m
2026-07-10 TUI2B - Jul 10, 11:10 UTCJul 10, 15:10 UTC4h 0m
2026-07-10 TUI1AG - Jul 10, 07:50 UTCJul 10, 09:45 UTC1h 55m
2026-07-10 TUI5HJ - Jul 10, 04:30 UTCJul 10, 06:30 UTC2h 0m
2026-07-09 TUI4AW - Jul 9, 14:55 UTCJul 9, 17:15 UTC2h 20m
2026-07-09 TUI6BT - Jul 9, 11:15 UTCJul 9, 13:30 UTC2h 15m
2026-07-09 TUI1AG - Jul 9, 07:45 UTCJul 9, 09:40 UTC1h 55m
2026-07-09 TUI5HJ - Jul 9, 04:15 UTCJul 9, 06:15 UTC2h 0m
2026-07-08 TUI8NB - Jul 8, 17:40 UTCJul 8, 21:00 UTC3h 20m
2026-07-08 TUI5YT - Jul 8, 13:40 UTCJul 8, 16:25 UTC2h 45m
2026-07-08 TUI8GT FAO → DUS Jul 8, 08:00 UTCJul 8, 10:45 UTC2h 45m
2026-07-08 TUI7BG - Jul 8, 04:05 UTCJul 8, 06:45 UTC2h 40m
2026-07-07 TUI8LG RMF → DUS Jul 7, 08:30 UTCJul 7, 19:15 UTC10h 45m
2026-07-06 TUI6G LPA → DUS Jul 6, 16:40 UTCJul 6, 20:40 UTC4h 0m
2026-07-06 TUI2B - Jul 6, 11:05 UTCJul 6, 15:20 UTC4h 15m
2026-07-06 TUI1AG - Jul 6, 07:15 UTCJul 6, 09:25 UTC2h 10m
2026-07-06 TUI5HJ - Jul 6, 04:05 UTCJul 6, 05:55 UTC1h 50m
2026-07-05 TUI3XN FNC → DUS Jul 5, 16:45 UTCJul 5, 20:20 UTC3h 35m
2026-07-05 TUI4KT - Jul 5, 15:20 UTCJul 5, 15:25 UTC5m
2026-07-05 TUI4KT - Jul 5, 11:25 UTCJul 5, 14:40 UTC3h 15m
2026-07-05 TUI5GN TRS → HAJ Jul 5, 08:40 UTCJul 5, 09:55 UTC1h 15m

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

Mode-S 3C618B frequently asked

What is Mode-S code 3C618B?
3C618B is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AHLK.
Where is Mode-S 3C618B registered?
Mode-S code 3C618B is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C618B broadcasting right now?
Yes. Mode-S 3C618B is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C618B, octal 17060613, decimal 3,957,131.
What flights does 3C618B operate?
Mode-S 3C618B has broadcast 20 distinct callsigns, including TUI21W, TUI5AL, TUI2DJ, TUI8EA, TUI5HJ.