Apparatus

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sensors Mode-S transponder

3C71A6

ICAO 24-bit transponder address · allocated to Germany

Hex
3C71A6
Octal
17070646
Decimal
3,961,254
Country
DE
No current signal · last broadcast 14d ago
Flights observed
173
Distinct callsigns
20
Country
DE
Last broadcast
14d ago

Last known position

Most recent position reported by Mode-S 3C71A6.

Country allocation

The ICAO 24-bit address 3C71A6 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
BCS692 - 26 2026-07-07
BCS694 - 23 2026-07-22
BCS7JG - 17 2026-06-15
BCS10K - 17 2026-06-14
BCS673 - 16 2026-06-20
BCS675 - 12 2026-06-26
BCS653 - 10 2026-07-23
BCS657 - 9 2026-07-08
BCS651 - 8 2026-07-26
BCS032T - 5 2026-05-15
BCS031T European Air Transport 5 2026-05-15
BCS030T - 5 2026-05-15
BCS674 - 4 2026-07-01
BCS548 European Air Transport 3 2026-07-26
BCS679 European Air Transport 2 2026-07-19
BCS5GU - 2 2026-07-06
BCS21G - 2 2026-07-05
QY675 - 1 2026-06-24
BCS995 European Air Transport 1 2026-06-22
BCS962 European Air Transport 1 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BCS651 - Jul 26, 18:35 UTCJul 26, 21:30 UTC2h 55m
2026-07-26 BCS651 - Jul 26, 08:10 UTCJul 26, 08:25 UTC15m
2026-07-26 BCS548 LEJ → DEL Jul 26, 04:00 UTCJul 26, 04:35 UTC35m
2026-07-25 BCS548 LEJ → DEL Jul 25, 23:20 UTCJul 26, 02:15 UTC2h 55m
2026-07-25 BCS548 LEJ → DEL Jul 25, 05:10 UTCJul 25, 12:10 UTC7h 0m
2026-07-23 BCS653 - Jul 23, 13:50 UTCJul 23, 18:05 UTC4h 15m
2026-07-23 BCS653 - Jul 23, 02:35 UTCJul 23, 02:55 UTC20m
2026-07-22 BCS694 - Jul 22, 17:00 UTCJul 22, 22:30 UTC5h 30m
2026-07-22 BCS694 - Jul 22, 14:00 UTCJul 22, 14:10 UTC10m
2026-07-22 BCS694 - Jul 22, 12:00 UTCJul 22, 12:20 UTC20m
2026-07-21 BCS653 HKG → LEJ Jul 21, 02:10 UTCJul 21, 18:15 UTC16h 5m
2026-07-20 BCS694 - Jul 20, 22:20 UTCJul 20, 22:45 UTC25m
2026-07-20 BCS694 - Jul 20, 17:15 UTCJul 20, 20:35 UTC3h 20m
2026-07-20 BCS694 - Jul 20, 05:35 UTCJul 20, 14:10 UTC8h 35m
2026-07-19 BCS679 ALA → LEJ Jul 19, 10:25 UTCJul 19, 14:25 UTC4h 0m
2026-07-18 BCS679 ALA → LEJ Jul 18, 22:25 UTCJul 18, 22:45 UTC20m
2026-07-17 BCS694 - Jul 17, 22:45 UTCJul 17, 23:10 UTC25m
2026-07-17 BCS694 - Jul 17, 17:15 UTCJul 17, 20:50 UTC3h 35m
2026-07-17 BCS694 - Jul 17, 14:55 UTCJul 17, 15:05 UTC10m
2026-07-17 BCS694 - Jul 17, 06:10 UTCJul 17, 13:20 UTC7h 10m
2026-07-16 BCS653 - Jul 16, 12:05 UTCJul 16, 18:44 UTC6h 40m
2026-07-16 BCS653 - Jul 16, 04:35 UTCJul 16, 09:40 UTC5h 5m
2026-07-16 BCS653 - Jul 16, 02:25 UTCJul 16, 02:35 UTC10m
2026-07-15 BCS694 - Jul 15, 22:35 UTCJul 15, 23:05 UTC30m
2026-07-15 BCS694 - Jul 15, 18:25 UTCJul 15, 20:25 UTC2h 0m
2026-07-15 BCS694 - Jul 15, 17:25 UTCJul 15, 17:35 UTC10m
2026-07-15 BCS694 - Jul 15, 14:05 UTCJul 15, 14:15 UTC10m
2026-07-15 BCS694 - Jul 15, 05:20 UTCJul 15, 12:30 UTC7h 10m
2026-07-14 BCS653 DWC → LEJ Jul 14, 12:15 UTCJul 14, 18:55 UTC6h 40m
2026-07-14 BCS653 - Jul 14, 09:40 UTCJul 14, 09:50 UTC10m
2026-07-14 BCS653 - Jul 14, 04:50 UTCJul 14, 08:30 UTC3h 40m
2026-07-14 BCS653 - Jul 14, 02:40 UTCJul 14, 02:55 UTC15m
2026-07-13 BCS694 - Jul 13, 22:05 UTCJul 13, 22:30 UTC25m
2026-07-13 BCS694 - Jul 13, 17:55 UTCJul 13, 20:15 UTC2h 20m
2026-07-13 BCS694 - Jul 13, 16:55 UTCJul 13, 17:05 UTC10m
2026-07-13 BCS694 - Jul 13, 13:30 UTCJul 13, 13:55 UTC25m
2026-07-13 BCS694 - Jul 13, 05:01 UTCJul 13, 08:45 UTC3h 45m
2026-07-12 BCS651 MXP → LEJ Jul 12, 21:55 UTCJul 12, 23:10 UTC1h 15m
2026-07-12 BCS651 - Jul 12, 15:25 UTCJul 12, 19:05 UTC3h 40m
2026-07-12 BCS651 - Jul 12, 13:40 UTCJul 12, 13:55 UTC15m
2026-07-12 BCS651 - Jul 12, 10:05 UTCJul 12, 10:50 UTC45m
2026-07-12 BCS651 - Jul 12, 00:25 UTCJul 12, 06:35 UTC6h 10m
2026-07-11 BCS651 - Jul 11, 23:15 UTCJul 11, 23:20 UTC5m
2026-07-10 BCS694 - Jul 10, 17:30 UTCJul 10, 23:05 UTC5h 35m
2026-07-10 BCS694 - Jul 10, 13:30 UTCJul 10, 13:50 UTC20m
2026-07-10 BCS694 - Jul 10, 05:00 UTCJul 10, 11:50 UTC6h 50m
2026-07-08 BCS657 - Jul 8, 12:30 UTCJul 8, 19:15 UTC6h 45m
2026-07-08 BCS657 - Jul 8, 04:20 UTCJul 8, 09:50 UTC5h 30m
2026-07-08 BCS657 - Jul 8, 02:10 UTCJul 8, 02:25 UTC15m
2026-07-07 BCS692 - Jul 7, 22:10 UTCJul 7, 22:40 UTC30m

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.

Mode-S 3C71A6 frequently asked

What is Mode-S code 3C71A6?
3C71A6 is an ICAO 24-bit transponder address. Allocated to Germany.
Where is Mode-S 3C71A6 registered?
Mode-S code 3C71A6 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C71A6 broadcasting right now?
No active broadcast right now. Last signal was 14d ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C71A6, octal 17070646, decimal 3,961,254.
What flights does 3C71A6 operate?
Mode-S 3C71A6 has broadcast 20 distinct callsigns, including BCS692, BCS694, BCS7JG, BCS10K, BCS673.