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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 LHX800 · 36,000 ft
Flights observed
229
Distinct callsigns
20
Country
DE
Last broadcast
10h 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 City Airlines 15 2026-05-27
LHX9H City Airlines 14 2026-05-27
LHX2H City Airlines 14 2026-05-27
LHX1MY City Airlines 14 2026-05-26
LHX9JW City Airlines 13 2026-05-26
LHX3KR City Airlines 13 2026-05-29
LHX1U City Airlines 13 2026-05-29
LHX7TA City Airlines 12 2026-05-22
LHX5U City Airlines 12 2026-05-22
LHX4NJ - 12 2026-05-26
LHX924 City Airlines 11 2026-05-21
LHX5H - 11 2026-05-21
LHX9YY City Airlines 6 2026-05-29
LHX2CN City Airlines 6 2026-05-29
LHX9HP - 5 2026-05-29
LHX8XV City Airlines 5 2026-04-19
LHX800 City Airlines 5 2026-05-29
LHX98X City Airlines 4 2026-04-17
LHX5KY - 4 2026-04-19
LHX077 City Airlines 4 2026-05-21

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 LHX1U LHR → FRA May 29, 18:00 UTCMay 29, 19:05 UTC1h 5m
2026-05-29 LHX3KR FRA → LHR May 29, 15:30 UTCMay 29, 16:35 UTC1h 5m
2026-05-29 LHX2CN HAM → FRA May 29, 13:15 UTCMay 29, 14:00 UTC45m
2026-05-29 LHX9YY FRA → HAM May 29, 11:25 UTCMay 29, 12:10 UTC45m
2026-05-29 LHX9HP ARN → FRA May 29, 08:20 UTCMay 29, 10:00 UTC1h 40m
2026-05-29 LHX800 FRA → ARN May 29, 05:20 UTCMay 29, 07:05 UTC1h 45m
2026-05-28 LHX1U LHR → FRA May 28, 17:45 UTCMay 28, 18:50 UTC1h 5m
2026-05-28 LHX3KR FRA → LHR May 28, 15:20 UTCMay 28, 16:25 UTC1h 5m
2026-05-28 LHX2CN HAM → FRA May 28, 13:10 UTCMay 28, 14:00 UTC50m
2026-05-28 LHX9YY FRA → HAM May 28, 11:20 UTCMay 28, 12:05 UTC45m
2026-05-27 LHX2H LHR → FRA May 27, 11:05 UTCMay 27, 12:00 UTC55m
2026-05-27 LHX4UT FRA → LHR May 27, 08:25 UTCMay 27, 09:35 UTC1h 10m
2026-05-27 LHX9H LHR → FRA May 27, 05:49 UTCMay 27, 06:44 UTC55m
2026-05-26 LHX1MY MUC → DUS May 26, 18:19 UTCMay 26, 19:25 UTC1h 5m
2026-05-26 LHX9JW LHR → MUC May 26, 15:05 UTCMay 26, 15:54 UTC50m
2026-05-26 LHX4NJ FRA → HAM May 26, 13:15 UTCMay 26, 14:05 UTC50m
2026-05-25 LHX9JW LHR → MUC May 25, 15:35 UTCMay 25, 16:25 UTC50m
2026-05-25 LHX4NJ - May 25, 13:55 UTCMay 25, 14:35 UTC40m
2026-05-24 LHX2H LHR → FRA May 24, 10:50 UTCMay 24, 11:50 UTC1h 0m
2026-05-24 LHX4UT FRA → LHR May 24, 08:10 UTCMay 24, 09:20 UTC1h 10m
2026-05-24 LHX9H LHR → FRA May 24, 05:45 UTCMay 24, 06:45 UTC1h 0m
2026-05-23 LHX1MY MUC → DUS May 23, 18:35 UTCMay 23, 19:40 UTC1h 5m
2026-05-23 LHX9JW LHR → MUC May 23, 15:15 UTCMay 23, 16:15 UTC1h 0m
2026-05-23 LHX4NJ FRA → HAM May 23, 13:25 UTCMay 23, 14:05 UTC40m
2026-05-23 LHX2H LHR → FRA May 23, 11:00 UTCMay 23, 11:55 UTC55m
2026-05-23 LHX4UT FRA → LHR May 23, 08:20 UTCMay 23, 09:35 UTC1h 15m
2026-05-23 LHX9H LHR → FRA May 23, 06:00 UTCMay 23, 06:55 UTC55m
2026-05-22 LHX1MY MUC → DUS May 22, 18:20 UTCMay 22, 19:45 UTC1h 25m
2026-05-22 LHX5U LHR → FRA May 22, 13:00 UTCMay 22, 14:05 UTC1h 5m
2026-05-22 LHX7TA FRA → LHR May 22, 10:25 UTCMay 22, 11:35 UTC1h 10m
2026-05-21 LHX077 DUS → FRA May 21, 16:55 UTCMay 21, 17:25 UTC30m
2026-05-21 LHX076 FRA → DUS May 21, 15:30 UTCMay 21, 15:55 UTC25m
2026-05-21 LHX5U LHR → FRA May 21, 13:05 UTCMay 21, 14:15 UTC1h 10m
2026-05-21 LHX7TA FRA → LHR May 21, 10:30 UTCMay 21, 11:50 UTC1h 20m
2026-05-21 LHX5H - May 21, 07:55 UTCMay 21, 09:00 UTC1h 5m
2026-05-21 LHX924 FRA → LHR May 21, 05:20 UTCMay 21, 06:40 UTC1h 20m
2026-05-20 LHX2H LHR → FRA May 20, 12:00 UTCMay 20, 13:00 UTC1h 0m
2026-05-20 LHX4UT FRA → LHR May 20, 08:55 UTCMay 20, 10:15 UTC1h 20m
2026-05-20 LHX9H LHR → FRA May 20, 05:35 UTCMay 20, 06:40 UTC1h 5m
2026-05-19 LHX1MY MUC → DUS May 19, 18:15 UTCMay 19, 19:30 UTC1h 15m
2026-05-19 LHX9JW LHR → MUC May 19, 15:15 UTCMay 19, 16:10 UTC55m
2026-05-19 LHX4NJ - May 19, 13:20 UTCMay 19, 14:05 UTC45m
2026-05-18 LHX077 DUS → FRA May 18, 16:55 UTCMay 18, 17:20 UTC25m
2026-05-18 LHX076 FRA → DUS May 18, 15:30 UTCMay 18, 16:00 UTC30m
2026-05-18 LHX5U LHR → FRA May 18, 12:55 UTCMay 18, 14:05 UTC1h 10m
2026-05-18 LHX7TA FRA → LHR May 18, 10:15 UTCMay 18, 11:35 UTC1h 20m
2026-05-18 LHX5H - May 18, 07:45 UTCMay 18, 08:55 UTC1h 10m
2026-05-18 LHX924 FRA → LHR May 18, 05:20 UTCMay 18, 06:35 UTC1h 15m
2026-05-17 LHX1U LHR → FRA May 17, 18:20 UTCMay 17, 19:25 UTC1h 5m
2026-05-17 LHX3KR FRA → LHR May 17, 15:55 UTCMay 17, 17:05 UTC1h 10m

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, LHX9H, LHX2H, LHX1MY, LHX9JW.