Apparatus

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sensors Mode-S transponder

3C70B4

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-ALET · BOEING 757-200

Hex
3C70B4
Octal
17070264
Decimal
3,961,012
Country
DE
Tail
D-ALET
Type
B752
No current signal · last broadcast 1h ago
Flights observed
176
Distinct callsigns
20
Country
DE
Last broadcast
1h ago

Last known position

Most recent position reported by Mode-S 3C70B4.

Country allocation

The ICAO 24-bit address 3C70B4 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
BCS4GC European Air Transport 27 2026-07-16
BCS1MU - 26 2026-07-17
BCS9114 - 13 2026-06-26
BCS9117 - 12 2026-06-26
BCS7332 - 10 2026-06-26
BCS4127 - 10 2026-06-12
BCS4126 European Air Transport 10 2026-06-12
BCS7331 - 9 2026-06-25
BCS3LR European Air Transport 9 2026-05-11
BCS49N European Air Transport 8 2026-07-17
BCS55K European Air Transport 7 2026-05-11
BCS19U - 6 2026-07-11
BCS47H - 5 2026-07-12
BCS2213 - 5 2026-07-11
BCS138 - 3 2026-06-23
BCS7CW - 2 2026-06-22
BCS3845 European Air Transport 2 2026-06-01
BCS3844 European Air Transport 2 2026-06-01
BCS842 European Air Transport 1 2026-05-21
BCS7856 - 1 2026-06-22

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-17 BCS49N BCN → MXP Jul 17, 20:29 UTCJul 17, 21:00 UTC30m
2026-07-17 BCS1MU - Jul 17, 01:55 UTCJul 17, 03:30 UTC1h 35m
2026-07-16 BCS4GC BCN → BCN Jul 16, 20:29 UTCJul 16, 22:10 UTC1h 40m
2026-07-16 BCS1MU BRU → BCN Jul 16, 01:55 UTCJul 16, 03:35 UTC1h 40m
2026-07-15 BCS4GC BCN → BRU Jul 15, 20:30 UTCJul 15, 22:05 UTC1h 35m
2026-07-15 BCS1MU BRU → BCN Jul 15, 01:50 UTCJul 15, 03:25 UTC1h 35m
2026-07-14 BCS4GC - Jul 14, 20:25 UTCJul 14, 21:55 UTC1h 30m
2026-07-14 BCS1MU BRU → BCN Jul 14, 01:45 UTCJul 14, 03:25 UTC1h 40m
2026-07-13 BCS4GC BCN → BRU Jul 13, 20:25 UTCJul 13, 22:15 UTC1h 50m
2026-07-12 BCS47H LEJ → BCN Jul 12, 23:10 UTCJul 13, 01:15 UTC2h 5m
2026-07-11 BCS2213 - Jul 11, 03:45 UTCJul 11, 05:01 UTC1h 15m
2026-07-11 BCS19U MXP → LTN Jul 11, 01:05 UTCJul 11, 02:35 UTC1h 30m
2026-07-10 BCS49N BCN → MXP Jul 10, 20:35 UTCJul 10, 21:45 UTC1h 10m
2026-07-10 BCS1MU - Jul 10, 01:55 UTCJul 10, 03:30 UTC1h 35m
2026-07-09 BCS4GC BCN → BRU Jul 9, 20:25 UTCJul 9, 22:05 UTC1h 40m
2026-07-09 BCS1MU - Jul 9, 01:50 UTCJul 9, 03:25 UTC1h 35m
2026-07-08 BCS4GC BCN → BRU Jul 8, 20:25 UTCJul 8, 22:10 UTC1h 45m
2026-07-08 BCS1MU - Jul 8, 01:55 UTCJul 8, 03:25 UTC1h 30m
2026-07-07 BCS4GC BCN → BRU Jul 7, 20:35 UTCJul 7, 22:15 UTC1h 40m
2026-07-07 BCS1MU - Jul 7, 02:00 UTCJul 7, 03:30 UTC1h 30m
2026-07-06 BCS4GC BCN → BRU Jul 6, 20:30 UTCJul 6, 22:20 UTC1h 50m
2026-07-05 BCS47H LEJ → BCN Jul 5, 23:00 UTCJul 6, 00:55 UTC1h 55m
2026-07-04 BCS2213 EMA → LEJ Jul 4, 19:20 UTCJul 4, 20:40 UTC1h 20m
2026-07-04 BCS2214 MXP → EMA Jul 4, 16:20 UTCJul 4, 18:00 UTC1h 40m
2026-07-03 BCS49N BCN → MXP Jul 3, 20:30 UTCJul 3, 21:35 UTC1h 5m
2026-07-03 BCS1MU - Jul 3, 01:50 UTCJul 3, 03:15 UTC1h 25m
2026-07-02 BCS4GC BCN → BRU Jul 2, 20:20 UTCJul 2, 22:00 UTC1h 40m
2026-07-02 BCS1MU BRU → BCN Jul 2, 01:55 UTCJul 2, 03:25 UTC1h 30m
2026-07-01 BCS4GC BCN → BRU Jul 1, 20:25 UTCJul 1, 22:20 UTC1h 55m
2026-07-01 BCS1MU - Jul 1, 02:00 UTCJul 1, 03:30 UTC1h 30m
2026-06-30 BCS4GC BCN → BRU Jun 30, 20:30 UTCJun 30, 22:15 UTC1h 45m
2026-06-30 BCS1MU BRU → BCN Jun 30, 01:50 UTCJun 30, 03:20 UTC1h 30m
2026-06-29 BCS4GC BCN → BRU Jun 29, 20:35 UTCJun 29, 22:15 UTC1h 40m
2026-06-28 BCS47H LEJ → BCN Jun 28, 23:50 UTCJun 29, 01:50 UTC2h 0m
2026-06-26 BCS9117 - Jun 26, 18:20 UTCJun 26, 19:24 UTC1h 5m
2026-06-26 BCS9114 - Jun 26, 06:09 UTCJun 26, 06:54 UTC45m
2026-06-26 BCS7332 CDG → MXP Jun 26, 01:10 UTCJun 26, 02:09 UTC1h 0m
2026-06-25 BCS7331 MXP → CDG Jun 25, 22:45 UTCJun 25, 23:44 UTC1h 0m
2026-06-25 BCS9117 - Jun 25, 18:34 UTCJun 25, 19:29 UTC55m
2026-06-25 BCS9114 - Jun 25, 06:14 UTCJun 25, 07:05 UTC50m
2026-06-25 BCS7332 CDG → MXP Jun 25, 01:19 UTCJun 25, 02:19 UTC1h 0m
2026-06-24 BCS7331 MXP → CDG Jun 24, 22:49 UTCJun 24, 23:50 UTC1h 0m
2026-06-24 BCS9117 - Jun 24, 18:25 UTCJun 24, 19:24 UTC1h 0m
2026-06-24 BCS9114 - Jun 24, 06:04 UTCJun 24, 06:50 UTC45m
2026-06-24 BCS7332 - Jun 24, 00:59 UTCJun 24, 02:00 UTC1h 0m
2026-06-23 BCS7331 MXP → CDG Jun 23, 22:44 UTCJun 23, 23:50 UTC1h 5m
2026-06-23 BCS9117 - Jun 23, 18:20 UTCJun 23, 19:19 UTC1h 0m
2026-06-23 BCS9114 - Jun 23, 05:59 UTCJun 23, 06:49 UTC50m
2026-06-23 BCS138 LEJ → MXP Jun 23, 02:15 UTCJun 23, 03:25 UTC1h 10m
2026-06-22 BCS7CW - Jun 22, 20:24 UTCJun 22, 21:45 UTC1h 20m

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

Mode-S 3C70B4 frequently asked

What is Mode-S code 3C70B4?
3C70B4 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-ALET.
Where is Mode-S 3C70B4 registered?
Mode-S code 3C70B4 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C70B4 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 3C70B4, octal 17070264, decimal 3,961,012.
What flights does 3C70B4 operate?
Mode-S 3C70B4 has broadcast 20 distinct callsigns, including BCS4GC, BCS1MU, BCS9114, BCS9117, BCS7332.