Apparatus

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sensors Mode-S transponder

3C5421

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AEAA · AIRBUS A-300-600

Hex
3C5421
Octal
17052041
Decimal
3,953,697
Country
DE
Tail
D-AEAA
Type
A306
No current signal · last broadcast Jul 26, 11:20 UTC
Flights observed
172
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 11:20 UTC

Last known position

Most recent position reported by Mode-S 3C5421.

Country allocation

The ICAO 24-bit address 3C5421 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
BCS2EV - 17 2026-07-22
BCS48B European Air Transport 14 2026-07-22
BCS55K - 10 2026-07-20
BCS3LR - 9 2026-07-20
BCS9TC - 5 2026-07-02
BCS73B - 5 2026-07-09
BCS90Y - 4 2026-06-14
BCS4GC European Air Transport 4 2026-05-07
BCS44C - 4 2026-06-24
BCS20A - 4 2026-06-24
BCS1MU European Air Transport 4 2026-05-08
BCS6GA European Air Transport 3 2026-07-25
BCS58L European Air Transport 3 2026-06-18
BCS3265 European Air Transport 3 2026-07-17
BCS3264 - 3 2026-07-17
BCS2FC - 3 2026-07-09
BCS1LG - 3 2026-07-09
BCS198 - 3 2026-06-30
BCS186 - 3 2026-07-10
BCS6RN European Air Transport 2 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 BCS56W EMA → LEJ Jul 26, 10:00 UTCJul 26, 11:15 UTC1h 15m
2026-07-25 BCS4KN MXP → EMA Jul 25, 22:40 UTCJul 26, 00:15 UTC1h 35m
2026-07-25 BCS6GA BRU → MXP Jul 25, 06:00 UTCJul 25, 07:05 UTC1h 5m
2026-07-25 BCS55G LEJ → LEJ Jul 25, 02:00 UTCJul 25, 02:50 UTC50m
2026-07-24 BCS7993 VCE → LEJ Jul 24, 20:50 UTCJul 24, 21:55 UTC1h 5m
2026-07-24 BCS6WA LEJ → VCE Jul 24, 03:30 UTCJul 24, 04:30 UTC1h 0m
2026-07-23 BCS39G LHR → LEJ Jul 23, 22:00 UTCJul 23, 23:25 UTC1h 25m
2026-07-23 BCS35P MXP → LHR Jul 23, 18:25 UTCJul 23, 19:50 UTC1h 25m
2026-07-23 BCS6756 LHR → LTN Jul 23, 08:15 UTCJul 23, 09:45 UTC1h 30m
2026-07-23 BCS62B LEJ → LTN Jul 23, 02:10 UTCJul 23, 03:20 UTC1h 10m
2026-07-22 BCS48B CDG → LEJ Jul 22, 21:10 UTCJul 22, 22:20 UTC1h 10m
2026-07-22 BCS2EV LEJ → CDG Jul 22, 00:40 UTCJul 22, 01:55 UTC1h 15m
2026-07-21 BCS752 BAH → LEJ Jul 21, 21:10 UTCJul 21, 22:20 UTC1h 10m
2026-07-21 BCS755 LEJ → MXP Jul 21, 00:55 UTCJul 21, 02:00 UTC1h 5m
2026-07-20 BCS55K BCN → LEJ Jul 20, 20:10 UTCJul 20, 22:00 UTC1h 50m
2026-07-20 BCS3LR LEJ → BCN Jul 20, 00:25 UTCJul 20, 02:25 UTC2h 0m
2026-07-18 BCS6RN BSL → LEJ Jul 18, 19:35 UTCJul 18, 20:35 UTC1h 0m
2026-07-18 BCS4958 GVA → BSL Jul 18, 05:45 UTCJul 18, 06:15 UTC30m
2026-07-18 BCS53A LEJ → GVA Jul 18, 03:05 UTCJul 18, 04:10 UTC1h 5m
2026-07-17 BCS3265 GOT → CPH Jul 17, 20:40 UTCJul 17, 21:44 UTC1h 5m
2026-07-17 BCS51M - Jul 17, 18:25 UTCJul 17, 18:50 UTC25m
2026-07-17 BCS3906 - Jul 17, 07:00 UTCJul 17, 07:25 UTC25m
2026-07-17 BCS3264 - Jul 17, 04:35 UTCJul 17, 05:35 UTC1h 0m
2026-07-16 BCS55K BCN → LEJ Jul 16, 20:25 UTCJul 16, 22:10 UTC1h 45m
2026-07-16 BCS3LR LEJ → BCN Jul 16, 02:35 UTCJul 16, 04:35 UTC2h 0m
2026-07-15 BCS2WP FRA → LEJ Jul 15, 20:50 UTCJul 15, 21:30 UTC40m
2026-07-15 BCS6359 - Jul 15, 16:05 UTCJul 15, 18:00 UTC1h 55m
2026-07-15 BCS41E - Jul 15, 01:40 UTCJul 15, 03:45 UTC2h 5m
2026-07-14 BCS8AA MXP → BRU Jul 14, 22:35 UTCJul 14, 23:40 UTC1h 4m
2026-07-14 BCS42M - Jul 14, 18:55 UTCJul 14, 20:00 UTC1h 5m
2026-07-14 BCS48D - Jul 14, 06:35 UTCJul 14, 07:25 UTC50m
2026-07-14 BCS6GA BRU → MXP Jul 14, 01:15 UTCJul 14, 02:20 UTC1h 5m
2026-07-13 BCS2UR MAD → BRU Jul 13, 20:20 UTCJul 13, 21:55 UTC1h 35m
2026-07-12 BCS230P ATH → MAD Jul 12, 23:55 UTCJul 13, 03:10 UTC3h 15m
2026-07-12 BCS6045 OPO → ATH Jul 12, 18:40 UTCJul 12, 21:55 UTC3h 15m
2026-07-12 BCS231P CDG → ATH Jul 12, 12:35 UTCJul 12, 13:30 UTC55m
2026-07-11 BCS7CK MXP → MAD Jul 11, 01:25 UTCJul 11, 03:05 UTC1h 40m
2026-07-10 BCS37R - Jul 10, 22:10 UTCJul 10, 23:55 UTC1h 45m
2026-07-10 BCS6360 - Jul 10, 17:05 UTCJul 10, 19:20 UTC2h 15m
2026-07-10 BCS186 - Jul 10, 02:35 UTCJul 10, 03:15 UTC40m
2026-07-09 BCS1LG LIS → LEJ Jul 9, 18:55 UTCJul 9, 21:50 UTC2h 55m
2026-07-09 BCS2FC - Jul 9, 05:20 UTCJul 9, 06:35 UTC1h 15m
2026-07-09 BCS73B - Jul 9, 00:40 UTCJul 9, 02:35 UTC1h 55m
2026-07-08 BCS48B - Jul 8, 20:55 UTCJul 8, 22:00 UTC1h 5m
2026-07-08 BCS2EV LEJ → CDG Jul 8, 00:35 UTCJul 8, 01:40 UTC1h 5m
2026-07-07 BCS48B - Jul 7, 21:10 UTCJul 7, 22:20 UTC1h 10m
2026-07-07 BCS2EV LEJ → CDG Jul 7, 00:40 UTCJul 7, 01:50 UTC1h 10m
2026-07-06 BCS55K BCN → LEJ Jul 6, 20:15 UTCJul 6, 22:15 UTC2h 0m
2026-07-06 BCS3LR LEJ → BCN Jul 6, 00:20 UTCJul 6, 02:10 UTC1h 50m
2026-07-04 BCS6RN - Jul 4, 18:50 UTCJul 4, 19:40 UTC50m

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

Mode-S 3C5421 frequently asked

What is Mode-S code 3C5421?
3C5421 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AEAA.
Where is Mode-S 3C5421 registered?
Mode-S code 3C5421 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C5421 broadcasting right now?
No active broadcast right now. Last signal was Jul 26, 11:20 UTC.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C5421, octal 17052041, decimal 3,953,697.
What flights does 3C5421 operate?
Mode-S 3C5421 has broadcast 20 distinct callsigns, including BCS2EV, BCS48B, BCS55K, BCS3LR, BCS9TC.