Apparatus

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sensors Mode-S transponder

3C71A7

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ALMG

Hex
3C71A7
Octal
17070647
Decimal
3,961,255
Country
DE
Tail
D-ALMG
Type
A333
No current signal · last broadcast 1h ago
Flights observed
221
Distinct callsigns
20
Country
DE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 3C71A7.

Country allocation

The ICAO 24-bit address 3C71A7 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
BCS673 - 24 2026-06-13
BCS675 - 15 2026-06-28
BCS651 - 14 2026-06-21
BCS378 - 14 2026-07-17
BCS354 - 13 2026-07-16
BCS679 - 11 2026-07-12
BCS692 - 10 2026-07-10
BCS991 - 9 2026-07-16
BCS644 - 9 2026-07-11
BCS1RM - 9 2026-07-16
BCS6TP - 8 2026-07-03
BCS642 - 8 2026-04-18
BCS548 European Air Transport 8 2026-06-20
BCS364 European Air Transport 7 2026-05-08
BCS361 European Air Transport 6 2026-05-08
BCS55G European Air Transport 4 2026-06-07
BCS360 - 4 2026-07-06
BCS1491 European Air Transport 4 2026-06-15
BCS6YG - 3 2026-07-18
BCS657 - 3 2026-07-10

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 BCS6YG - Jul 18, 02:50 UTCJul 18, 03:45 UTC55m
2026-07-17 BCS373 CVG → MXP Jul 17, 22:45 UTCJul 17, 23:35 UTC50m
2026-07-17 BCS378 - Jul 17, 12:04 UTCJul 17, 19:55 UTC7h 50m
2026-07-16 BCS354 - Jul 16, 19:05 UTCJul 17, 04:14 UTC9h 10m
2026-07-16 BCS991 TLV → MXP Jul 16, 10:55 UTCJul 16, 14:40 UTC3h 45m
2026-07-16 BCS1RM LEJ → TLV Jul 16, 04:40 UTCJul 16, 08:05 UTC3h 25m
2026-07-15 BCS121A BRU → LEJ Jul 15, 21:45 UTCJul 15, 22:40 UTC55m
2026-07-15 BCS378 - Jul 15, 11:50 UTCJul 15, 19:35 UTC7h 45m
2026-07-14 BCS354 LEJ → CVG Jul 14, 20:25 UTCJul 15, 05:05 UTC8h 39m
2026-07-12 BCS679 - Jul 12, 08:35 UTCJul 12, 15:05 UTC6h 30m
2026-07-12 BCS679 - Jul 12, 01:45 UTCJul 12, 06:35 UTC4h 50m
2026-07-11 BCS679 - Jul 11, 23:35 UTCJul 11, 23:45 UTC10m
2026-07-11 BCS644 - Jul 11, 19:10 UTCJul 11, 19:50 UTC40m
2026-07-11 BCS644 - Jul 11, 08:25 UTCJul 11, 12:00 UTC3h 35m
2026-07-10 BCS657 - Jul 10, 19:45 UTCJul 11, 02:15 UTC6h 30m
2026-07-10 BCS657 - Jul 10, 13:05 UTCJul 10, 14:45 UTC1h 40m
2026-07-10 BCS657 - Jul 10, 10:55 UTCJul 10, 11:05 UTC10m
2026-07-10 BCS692 - Jul 10, 07:50 UTCJul 10, 08:25 UTC35m
2026-07-10 BCS692 - Jul 10, 03:35 UTCJul 10, 05:55 UTC2h 20m
2026-07-10 BCS692 - Jul 10, 02:30 UTCJul 10, 02:45 UTC15m
2026-07-10 BCS692 - Jul 10, 00:05 UTCJul 10, 00:15 UTC10m
2026-07-09 BCS692 - Jul 9, 15:40 UTCJul 9, 19:15 UTC3h 35m
2026-07-09 BCS679 DWC → LEJ Jul 9, 06:40 UTCJul 9, 13:20 UTC6h 40m
2026-07-09 BCS679 - Jul 9, 04:55 UTCJul 9, 05:15 UTC20m
2026-07-09 BCS679 - Jul 9, 00:30 UTCJul 9, 03:55 UTC3h 25m
2026-07-08 BCS679 - Jul 8, 22:20 UTCJul 8, 22:35 UTC15m
2026-07-08 BCS644 - Jul 8, 19:00 UTCJul 8, 19:45 UTC45m
2026-07-08 BCS644 - Jul 8, 08:20 UTCJul 8, 11:50 UTC3h 30m
2026-07-06 BCS871 JFK → LEJ Jul 6, 12:05 UTCJul 6, 19:15 UTC7h 10m
2026-07-06 BCS360 BOS → JFK Jul 6, 05:15 UTCJul 6, 06:00 UTC45m
2026-07-04 BCS360 FRA → BOS Jul 4, 18:50 UTCJul 5, 03:40 UTC8h 50m
2026-07-04 BCS5TM - Jul 4, 15:30 UTCJul 4, 16:05 UTC35m
2026-07-04 BCS365 JFK → BRU Jul 4, 07:10 UTCJul 4, 13:45 UTC6h 35m
2026-07-03 BCS360 LEJ → JFK Jul 3, 19:10 UTCJul 4, 03:45 UTC8h 35m
2026-07-03 BCS6TP - Jul 3, 04:35 UTCJul 3, 05:30 UTC55m
2026-07-02 BCS378 - Jul 2, 12:40 UTCJul 2, 19:50 UTC7h 10m
2026-07-01 BCS354 - Jul 1, 18:35 UTCJul 2, 04:10 UTC9h 35m
2026-07-01 BCS991 TLV → MXP Jul 1, 10:50 UTCJul 1, 14:25 UTC3h 35m
2026-07-01 BCS1RM LEJ → TLV Jul 1, 04:35 UTCJul 1, 08:10 UTC3h 35m
2026-06-30 BCS6TP BRU → LEJ Jun 30, 23:35 UTCJul 1, 00:30 UTC55m
2026-06-30 BCS378 - Jun 30, 11:50 UTCJun 30, 19:15 UTC7h 25m
2026-06-29 BCS357 EMA → CVG Jun 29, 21:30 UTCJun 30, 05:10 UTC7h 40m
2026-06-29 BCS200 LEJ → EMA Jun 29, 17:30 UTCJun 29, 19:00 UTC1h 30m
2026-06-28 BCS675 - Jun 28, 12:19 UTCJun 28, 16:25 UTC4h 5m
2026-06-28 BCS675 - Jun 28, 01:40 UTCJun 28, 01:59 UTC20m
2026-06-27 BCS692 - Jun 27, 22:15 UTCJun 27, 22:49 UTC35m
2026-06-27 BCS692 - Jun 27, 18:20 UTCJun 27, 21:29 UTC3h 10m
2026-06-27 BCS692 - Jun 27, 17:09 UTCJun 27, 17:25 UTC15m
2026-06-27 BCS692 - Jun 27, 13:55 UTCJun 27, 14:20 UTC25m
2026-06-27 BCS692 - Jun 27, 05:19 UTCJun 27, 09:04 UTC3h 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-ALMG page for operator, model, and routing details .

Mode-S 3C71A7 frequently asked

What is Mode-S code 3C71A7?
3C71A7 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ALMG.
Where is Mode-S 3C71A7 registered?
Mode-S code 3C71A7 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C71A7 broadcasting right now?
No active broadcast right now. Last signal was 1h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C71A7, octal 17070647, decimal 3,961,255.
What flights does 3C71A7 operate?
Mode-S 3C71A7 has broadcast 20 distinct callsigns, including BCS673, BCS675, BCS651, BCS378, BCS354.