Apparatus

Try JFK, AAL1290, BAW, or N225AN.

sensors Mode-S transponder

3C6637

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIQW · AIRBUS A-320

Hex
3C6637
Octal
17063067
Decimal
3,958,327
Country
DE
Tail
D-AIQW
Type
A320
Broadcasting now · callsign DLH43V · 18,500 ft
Flights observed
555
Distinct callsigns
20
Country
DE
Last broadcast
Jul 26, 20:40 UTC

Current position

3C6637 is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C6637 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
DLH6UT Lufthansa 7 2026-07-25
DLH5EF Lufthansa 7 2026-07-25
DLH8CT Lufthansa 6 2026-07-25
DLH4YC Lufthansa 6 2026-07-25
DLH9HC Lufthansa 5 2026-07-25
DLH8VR - 5 2026-07-23
DLH830 - 5 2026-07-22
DLH7KH - 5 2026-06-26
DLH6KL Lufthansa 5 2026-07-23
DLH5JV Lufthansa 5 2026-07-26
DLH5AA - 5 2026-06-26
DLH4EF - 5 2026-07-21
DLH3HT Lufthansa 5 2026-07-22
DLH1RJ - 5 2026-06-27
DLH175 - 5 2026-07-20
DLH174 - 5 2026-07-20
DLH007 - 5 2026-07-21
DLH9AV - 4 2026-06-18
DLH7XP - 4 2026-06-18
DLH5TV - 4 2026-07-15

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-26 DLH17P FRA → LYS Jul 26, 18:20 UTCJul 26, 20:40 UTC2h 20m
2026-07-26 DLH33A BCN → FRA Jul 26, 14:55 UTCJul 26, 16:45 UTC1h 50m
2026-07-26 DLH46P SZG → FRA Jul 26, 12:40 UTCJul 26, 13:30 UTC50m
2026-07-26 DLH06J MUC → FAO Jul 26, 11:00 UTCJul 26, 11:35 UTC35m
2026-07-26 DLH5AL MUC → LUX Jul 26, 08:50 UTCJul 26, 09:30 UTC40m
2026-07-26 DLH062 FRA → FMO Jul 26, 07:20 UTCJul 26, 07:55 UTC35m
2026-07-26 DLH5JV PRG → MUC Jul 26, 05:15 UTCJul 26, 05:50 UTC35m
2026-07-25 DLH9HC FRA → LEJ Jul 25, 20:35 UTCJul 25, 21:15 UTC40m
2026-07-25 DLH8CT MUC → FRA Jul 25, 17:50 UTCJul 25, 18:50 UTC1h 0m
2026-07-25 DLH5EF BER → FRA Jul 25, 15:25 UTCJul 25, 16:35 UTC1h 10m
2026-07-25 DLH4YC VCE → FRA Jul 25, 12:50 UTCJul 25, 14:05 UTC1h 15m
2026-07-25 DLH6UT FRA → LIN Jul 25, 10:55 UTCJul 25, 11:50 UTC55m
2026-07-25 DLH6UT FRA → LIN Jul 25, 10:35 UTCJul 25, 10:50 UTC15m
2026-07-25 DLH1TT FRA → BLL Jul 25, 07:50 UTCJul 25, 09:15 UTC1h 25m
2026-07-25 DLH5PP BSL → MUC Jul 25, 05:40 UTCJul 25, 06:55 UTC1h 15m
2026-07-24 DLH9XY MUC → LHR Jul 24, 17:45 UTCJul 24, 18:30 UTC45m
2026-07-24 DLH1KY - Jul 24, 16:00 UTCJul 24, 16:50 UTC50m
2026-07-24 DLH1455 - Jul 24, 12:45 UTCJul 24, 14:30 UTC1h 45m
2026-07-24 DLH1454 FRA → TIA Jul 24, 09:50 UTCJul 24, 11:10 UTC1h 20m
2026-07-24 DLH6P PRG → FRA Jul 24, 07:15 UTCJul 24, 08:05 UTC50m
2026-07-24 DLH8RX FRA → EDI Jul 24, 05:35 UTCJul 24, 06:25 UTC50m
2026-07-23 DLH8VR CPH → FRA Jul 23, 13:10 UTCJul 23, 14:05 UTC55m
2026-07-23 DLH6KL FRA → CPH Jul 23, 10:50 UTCJul 23, 11:55 UTC1h 5m
2026-07-23 DLH2J CDG → FRA Jul 23, 08:35 UTCJul 23, 09:20 UTC45m
2026-07-23 DLH63K OVD → FRA Jul 23, 06:35 UTCJul 23, 07:25 UTC50m
2026-07-23 DLH7P PRG → FRA Jul 23, 04:00 UTCJul 23, 04:45 UTC45m
2026-07-22 DLH5XY ARN → FRA Jul 22, 20:35 UTCJul 22, 21:15 UTC40m
2026-07-22 DLH3HT HAM → FRA Jul 22, 17:30 UTCJul 22, 18:30 UTC1h 0m
2026-07-22 DLH830 - Jul 22, 15:25 UTCJul 22, 16:30 UTC1h 5m
2026-07-22 DLH8VR - Jul 22, 13:00 UTCJul 22, 14:00 UTC1h 0m
2026-07-22 DLH6KL FRA → CPH Jul 22, 11:20 UTCJul 22, 12:05 UTC45m
2026-07-22 DLH5HR FRA → ZRH Jul 22, 04:15 UTCJul 22, 04:45 UTC30m
2026-07-21 DLH8YJ FRA → NUE Jul 21, 20:20 UTCJul 21, 20:45 UTC25m
2026-07-21 DLH77W FRA → AGP Jul 21, 17:35 UTCJul 21, 19:10 UTC1h 35m
2026-07-21 DLH54N FRA → BCN Jul 21, 14:30 UTCJul 21, 16:10 UTC1h 40m
2026-07-21 DLH007 HAM → FRA Jul 21, 08:10 UTCJul 21, 08:55 UTC45m
2026-07-21 DLH4EF - Jul 21, 06:30 UTCJul 21, 07:15 UTC45m
2026-07-21 DLH4XV DUS → FRA Jul 21, 04:45 UTCJul 21, 05:15 UTC30m
2026-07-20 DLH078 FRA → DUS Jul 20, 19:45 UTCJul 20, 20:15 UTC30m
2026-07-20 DLH2XC - Jul 20, 16:10 UTCJul 20, 17:05 UTC55m
2026-07-20 DLH192 FRA → BER Jul 20, 14:20 UTCJul 20, 15:10 UTC50m
2026-07-20 DLH9MH BER → FRA Jul 20, 12:00 UTCJul 20, 12:45 UTC45m
2026-07-20 DLH2HH FRA → BER Jul 20, 10:05 UTCJul 20, 10:50 UTC45m
2026-07-20 DLH175 BER → FRA Jul 20, 07:55 UTCJul 20, 08:45 UTC50m
2026-07-20 DLH174 FRA → BER Jul 20, 05:50 UTCJul 20, 06:40 UTC50m
2026-07-19 DLH8VY MXP → MUC Jul 19, 17:35 UTCJul 19, 18:45 UTC1h 10m
2026-07-19 DLH1LA - Jul 19, 15:20 UTCJul 19, 16:30 UTC1h 10m
2026-07-19 DLH3F - Jul 19, 13:20 UTCJul 19, 14:05 UTC45m
2026-07-19 DLH36E FRA → CDG Jul 19, 11:05 UTCJul 19, 12:05 UTC1h 0m
2026-07-19 DLH179 BER → FRA Jul 19, 08:50 UTCJul 19, 09:40 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-AIQW page for operator, model, and routing details .

Mode-S 3C6637 frequently asked

What is Mode-S code 3C6637?
3C6637 is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIQW.
Where is Mode-S 3C6637 registered?
Mode-S code 3C6637 is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C6637 broadcasting right now?
Yes. Mode-S 3C6637 is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C6637, octal 17063067, decimal 3,958,327.
What flights does 3C6637 operate?
Mode-S 3C6637 has broadcast 20 distinct callsigns, including DLH6UT, DLH5EF, DLH8CT, DLH4YC, DLH9HC.