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sensors Mode-S transponder

3C6551

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIJQ · AIRBUS A-320neo

Hex
3C6551
Octal
17062521
Decimal
3,958,097
Country
DE
Tail
D-AIJQ
Type
A20N
Broadcasting now · callsign LHX7TA · 38,000 ft
Flights observed
456
Distinct callsigns
20
Country
DE
Last broadcast
1h ago

Current position

3C6551 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C6551 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
LHX4UT - 23 2026-06-29
LHX3KR - 23 2026-07-03
LHX1U - 23 2026-07-03
LHX924 - 22 2026-07-14
LHX7TA - 22 2026-07-10
LHX5U - 22 2026-07-10
LHX5H - 22 2026-07-14
LHX2H - 22 2026-06-29
LHX1MY - 22 2026-06-29
LHX9H - 21 2026-06-30
LHX9JW City Airlines 14 2026-05-30
LHX4NJ - 13 2026-05-30
LHX077 - 13 2026-07-10
LHX076 - 13 2026-07-10
LHX9YY - 12 2026-07-03
LHX9HP - 12 2026-07-03
LHX800 - 12 2026-07-03
LHX2CN City Airlines 12 2026-07-03
LHX943 - 9 2026-07-12
LHX1145 - 9 2026-07-12

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-14 LHX5H - Jul 14, 07:45 UTCJul 14, 08:55 UTC1h 10m
2026-07-14 LHX924 FRA → LHR Jul 14, 05:15 UTCJul 14, 06:30 UTC1h 15m
2026-07-13 LHX851 - Jul 13, 15:20 UTCJul 13, 17:40 UTC2h 20m
2026-07-13 LHX850 FRA → HEL Jul 13, 11:55 UTCJul 13, 13:55 UTC2h 0m
2026-07-12 LHX1145 - Jul 12, 16:45 UTCJul 12, 18:10 UTC1h 25m
2026-07-12 LHX1144 - Jul 12, 13:45 UTCJul 12, 15:20 UTC1h 35m
2026-07-12 LHX943 MAN → FRA Jul 12, 11:15 UTCJul 12, 12:30 UTC1h 15m
2026-07-12 LHX942 FRA → MAN Jul 12, 08:30 UTCJul 12, 09:55 UTC1h 25m
2026-07-12 LHX949 MAN → FRA Jul 12, 06:01 UTCJul 12, 07:15 UTC1h 15m
2026-07-11 LHX948 FRA → MAN Jul 11, 20:30 UTCJul 11, 22:05 UTC1h 35m
2026-07-11 LHX1091 - Jul 11, 04:40 UTCJul 11, 06:05 UTC1h 25m
2026-07-10 LHX1090 FRA → MRS Jul 10, 19:35 UTCJul 10, 21:05 UTC1h 30m
2026-07-10 LHX077 - Jul 10, 16:45 UTCJul 10, 17:15 UTC30m
2026-07-10 LHX076 FRA → DUS Jul 10, 15:25 UTCJul 10, 15:55 UTC30m
2026-07-10 LHX5U LHR → FRA Jul 10, 13:05 UTCJul 10, 14:05 UTC1h 0m
2026-07-10 LHX7TA FRA → LHR Jul 10, 10:20 UTCJul 10, 11:35 UTC1h 15m
2026-07-10 LHX5H LHR → FRA Jul 10, 07:55 UTCJul 10, 08:50 UTC55m
2026-07-10 LHX924 FRA → LHR Jul 10, 05:10 UTCJul 10, 06:25 UTC1h 15m
2026-07-09 LHX851 HEL → FRA Jul 9, 16:10 UTCJul 9, 18:15 UTC2h 5m
2026-07-09 LHX850 FRA → HEL Jul 9, 13:00 UTCJul 9, 15:05 UTC2h 5m
2026-07-09 LHX1087 - Jul 9, 10:00 UTCJul 9, 11:25 UTC1h 25m
2026-07-09 LHX1086 - Jul 9, 07:25 UTCJul 9, 08:50 UTC1h 25m
2026-07-09 LHX1091 - Jul 9, 04:25 UTCJul 9, 05:50 UTC1h 25m
2026-07-08 LHX1090 FRA → MRS Jul 8, 19:45 UTCJul 8, 21:05 UTC1h 20m
2026-07-08 LHX1145 - Jul 8, 16:35 UTCJul 8, 18:15 UTC1h 40m
2026-07-08 LHX1144 - Jul 8, 13:40 UTCJul 8, 15:15 UTC1h 35m
2026-07-08 LHX943 MAN → FRA Jul 8, 10:55 UTCJul 8, 12:10 UTC1h 15m
2026-07-08 LHX942 FRA → MAN Jul 8, 08:10 UTCJul 8, 09:35 UTC1h 25m
2026-07-08 LHX949 - Jul 8, 05:20 UTCJul 8, 06:35 UTC1h 15m
2026-07-07 LHX948 FRA → MAN Jul 7, 19:55 UTCJul 7, 21:20 UTC1h 25m
2026-07-07 LHX077 DUS → FRA Jul 7, 16:45 UTCJul 7, 17:15 UTC30m
2026-07-07 LHX076 - Jul 7, 15:25 UTCJul 7, 15:55 UTC30m
2026-07-07 LHX5U - Jul 7, 13:00 UTCJul 7, 14:05 UTC1h 5m
2026-07-07 LHX7TA FRA → LHR Jul 7, 10:35 UTCJul 7, 11:45 UTC1h 10m
2026-07-07 LHX5H - Jul 7, 07:50 UTCJul 7, 08:55 UTC1h 5m
2026-07-07 LHX924 FRA → LHR Jul 7, 05:20 UTCJul 7, 06:45 UTC1h 25m
2026-07-06 LHX851 HEL → FRA Jul 6, 15:20 UTCJul 6, 17:25 UTC2h 5m
2026-07-06 LHX850 - Jul 6, 11:55 UTCJul 6, 14:05 UTC2h 10m
2026-07-06 LHX1087 - Jul 6, 09:25 UTCJul 6, 10:45 UTC1h 20m
2026-07-06 LHX1086 FRA → MRS Jul 6, 07:00 UTCJul 6, 08:15 UTC1h 15m
2026-07-06 LHX1091 - Jul 6, 04:20 UTCJul 6, 05:45 UTC1h 25m
2026-07-05 LHX1090 FRA → MRS Jul 5, 19:25 UTCJul 5, 20:45 UTC1h 20m
2026-07-05 LHX077 - Jul 5, 17:05 UTCJul 5, 17:40 UTC35m
2026-07-05 LHX076 - Jul 5, 15:30 UTCJul 5, 16:00 UTC30m
2026-07-05 LHX5U LHR → FRA Jul 5, 13:00 UTCJul 5, 14:05 UTC1h 5m
2026-07-05 LHX7TA FRA → LHR Jul 5, 10:15 UTCJul 5, 11:30 UTC1h 15m
2026-07-05 LHX5H - Jul 5, 07:40 UTCJul 5, 08:45 UTC1h 5m
2026-07-05 LHX924 FRA → LHR Jul 5, 05:20 UTCJul 5, 06:30 UTC1h 10m
2026-07-04 LHX1145 BIO → FRA Jul 4, 16:20 UTCJul 4, 18:05 UTC1h 45m
2026-07-04 LHX1144 FRA → BIO Jul 4, 13:35 UTCJul 4, 15:15 UTC1h 40m

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

Mode-S 3C6551 frequently asked

What is Mode-S code 3C6551?
3C6551 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIJQ.
Where is Mode-S 3C6551 registered?
Mode-S code 3C6551 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C6551 broadcasting right now?
Yes. Mode-S 3C6551 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C6551, octal 17062521, decimal 3,958,097.
What flights does 3C6551 operate?
Mode-S 3C6551 has broadcast 20 distinct callsigns, including LHX4UT, LHX3KR, LHX1U, LHX924, LHX7TA.