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 TUI8EA · 6,150 ft
Flights observed
364
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 20:35 UTC

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
TUI6YL TUIfly 5 2026-07-25
TUI6MB TUIfly 5 2026-07-24
TUI3WL TUIfly 5 2026-07-21
TUI3LH TUIfly 5 2026-07-25
TUI2WD TUIfly 5 2026-07-19
TUI2B - 5 2026-07-10
TUI23X - 5 2026-07-13
TUI1KN TUIfly 5 2026-07-21
TUI18H TUIfly 5 2026-07-24

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 TUI3CT FNC → FRA Jul 26, 16:40 UTCJul 26, 20:30 UTC3h 50m
2026-07-26 TUI5GY FRA → FNC Jul 26, 11:50 UTCJul 26, 15:40 UTC3h 50m
2026-07-26 TUI80L TRS → FRA Jul 26, 08:00 UTCJul 26, 09:05 UTC1h 5m
2026-07-26 TUI6LC FRA → TRS Jul 26, 05:35 UTCJul 26, 06:35 UTC1h 1m
2026-07-25 TUI58V RHO → FRA Jul 25, 17:30 UTCJul 25, 20:35 UTC3h 5m
2026-07-25 TUI3YJ FRA → RHO Jul 25, 12:45 UTCJul 25, 15:30 UTC2h 45m
2026-07-25 TUI6YL KGS → FRA Jul 25, 08:00 UTCJul 25, 11:00 UTC3h 0m
2026-07-25 TUI3LH TRS → FRA Jul 25, 04:00 UTCJul 25, 06:30 UTC2h 30m
2026-07-24 TUI119 DLM → FRA Jul 24, 16:55 UTCJul 24, 20:00 UTC3h 5m
2026-07-24 TUI18Y FRA → DLM Jul 24, 13:10 UTCJul 24, 15:30 UTC2h 20m
2026-07-24 TUI6MB HER → FRA Jul 24, 07:20 UTCJul 24, 10:20 UTC3h 0m
2026-07-24 TUI18H FRA → HER Jul 24, 03:10 UTCJul 24, 05:35 UTC2h 25m
2026-07-23 TUI3ME OPO → FRA Jul 23, 18:00 UTCJul 23, 20:25 UTC2h 25m
2026-07-23 TUI55G FRA → OPO Jul 23, 14:25 UTCJul 23, 16:40 UTC2h 15m
2026-07-23 TUI47N XRY → FRA Jul 23, 06:50 UTCJul 23, 09:25 UTC2h 35m
2026-07-23 TUI41D FRA → XRY Jul 23, 03:05 UTCJul 23, 05:45 UTC2h 40m
2026-07-22 TUI5345 - Jul 22, 14:50 UTCJul 22, 17:15 UTC2h 25m
2026-07-22 TUI5344 - Jul 22, 11:40 UTCJul 22, 13:40 UTC2h 0m
2026-07-22 TUI6AK - Jul 22, 11:10 UTCJul 22, 11:25 UTC15m
2026-07-22 TUI28B - Jul 22, 03:05 UTCJul 22, 05:10 UTC2h 5m
2026-07-21 TUI69E HRG → FRA Jul 21, 10:25 UTCJul 21, 20:10 UTC9h 45m
2026-07-21 TUI1KN PMI → FRA Jul 21, 07:05 UTCJul 21, 09:00 UTC1h 55m
2026-07-21 TUI3WL RHO → DUS Jul 21, 04:10 UTCJul 21, 05:55 UTC1h 45m
2026-07-20 TUI7NX - Jul 20, 17:15 UTCJul 20, 20:45 UTC3h 30m
2026-07-20 TUI2HE - Jul 20, 11:15 UTCJul 20, 15:10 UTC3h 55m
2026-07-20 TUI47N - Jul 20, 06:50 UTCJul 20, 09:30 UTC2h 40m
2026-07-20 TUI41D FRA → XRY Jul 20, 03:05 UTCJul 20, 05:45 UTC2h 40m
2026-07-19 TUI7TN LPA → FRA Jul 19, 16:15 UTCJul 19, 19:50 UTC3h 35m
2026-07-19 TUI2WD FRA → LPA Jul 19, 10:15 UTCJul 19, 14:30 UTC4h 15m
2026-07-19 TUI1KN PMI → FRA Jul 19, 06:25 UTCJul 19, 08:05 UTC1h 40m
2026-07-19 TUI3WL RHO → DUS Jul 19, 03:20 UTCJul 19, 05:20 UTC2h 0m
2026-07-18 TUI7TN LPA → FRA Jul 18, 17:10 UTCJul 18, 20:50 UTC3h 40m
2026-07-18 TUI2WD FRA → LPA Jul 18, 11:25 UTCJul 18, 15:30 UTC4h 5m
2026-07-18 TUI6MB - Jul 18, 06:20 UTCJul 18, 09:10 UTC2h 50m
2026-07-18 TUI7CX HAJ → HER Jul 18, 02:14 UTCJul 18, 04:50 UTC2h 36m
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

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.