Apparatus

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sensors Mode-S transponder

3C4594

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AALT · BOEING 777-200LR

Hex
3C4594
Octal
17042624
Decimal
3,949,972
Country
DE
Tail
D-AALT
Type
B77L
Broadcasting now · callsign BOX396 · 34,000 ft
Flights observed
10
Distinct callsigns
5
Country
DE
Last broadcast
15h ago

Current position

3C4594 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C4594 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 5 distinct

Callsign Airline Flights Last seen
BOX515 AeroLogic 4 2026-04-13
BOX396 - 2 2026-04-13
BOX116 - 2 2026-04-13
BOX580 - 1 2026-04-12
BOX381 - 1 2026-04-14

Recent flights last 10

DateFlightRouteTakeoffLandingDuration
2026-04-14 BOX381 - Apr 14, 09:35 UTCApr 14, 11:05 UTC1h 30m
2026-04-13 BOX396 - Apr 13, 19:50 UTCApr 13, 21:20 UTC1h 30m
2026-04-13 BOX396 - Apr 13, 19:35 UTCApr 13, 20:10 UTC35m
2026-04-13 BOX116 - Apr 13, 16:15 UTCApr 13, 16:55 UTC40m
2026-04-13 BOX116 - Apr 13, 16:00 UTCApr 13, 16:15 UTC15m
2026-04-13 BOX515 HKG → LEJ Apr 13, 12:20 UTCApr 13, 13:10 UTC50m
2026-04-13 BOX515 HKG → LEJ Apr 13, 11:55 UTCApr 13, 13:10 UTC1h 15m
2026-04-13 BOX515 HKG → LEJ Apr 13, 09:15 UTCApr 13, 12:15 UTC3h 0m
2026-04-13 BOX515 HKG → LEJ Apr 13, 01:05 UTCApr 13, 01:20 UTC15m
2026-04-12 BOX580 - Apr 12, 17:30 UTCApr 12, 20:15 UTC2h 45m

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

Mode-S 3C4594 frequently asked

What is Mode-S code 3C4594?
3C4594 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AALT.
Where is Mode-S 3C4594 registered?
Mode-S code 3C4594 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C4594 broadcasting right now?
Yes. Mode-S 3C4594 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C4594, octal 17042624, decimal 3,949,972.
What flights does 3C4594 operate?
Mode-S 3C4594 has broadcast 5 distinct callsigns, including BOX515, BOX396, BOX116, BOX580, BOX381.