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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
No current signal · last broadcast 2h ago
Flights observed
497
Distinct callsigns
20
Country
DE
Last broadcast
2h ago

Last known position

Most recent position reported by Mode-S 3C6637.

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
DLH5EF - 6 2026-07-15
DLH8CT - 5 2026-07-07
DLH7KH - 5 2026-06-26
DLH6UT - 5 2026-07-10
DLH5AA - 5 2026-06-26
DLH4YC - 5 2026-07-10
DLH1RJ - 5 2026-06-27
DLH9HC - 4 2026-07-07
DLH9AV - 4 2026-06-18
DLH830 Lufthansa 4 2026-05-25
DLH7XP - 4 2026-06-18
DLH5TV - 4 2026-07-15
DLH5JV - 4 2026-07-08
DLH54J - 4 2026-07-13
DLH4WF Lufthansa 4 2026-05-31
DLH4EF - 4 2026-07-10
DLH3HT Lufthansa 4 2026-05-25
DLH1HF - 4 2026-07-15
DLH19E - 4 2026-07-12
DLH174 - 4 2026-07-18

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-07-18 DLH174 FRA → BER Jul 18, 06:00 UTCJul 18, 06:45 UTC45m
2026-07-17 DLH8VR - Jul 17, 13:29 UTCJul 17, 14:35 UTC1h 5m
2026-07-17 DLH6KL FRA → CPH Jul 17, 11:00 UTCJul 17, 12:00 UTC1h 0m
2026-07-17 DLH5TT - Jul 17, 05:45 UTCJul 17, 06:54 UTC1h 10m
2026-07-16 DLH958 FRA → BHX Jul 16, 19:40 UTCJul 16, 21:00 UTC1h 20m
2026-07-16 DLH3RL SOF → FRA Jul 16, 16:19 UTCJul 16, 18:25 UTC2h 5m
2026-07-16 DLH7PL FRA → SOF Jul 16, 13:20 UTCJul 16, 15:05 UTC1h 45m
2026-07-16 DLH4P PRG → FRA Jul 16, 09:55 UTCJul 16, 10:50 UTC55m
2026-07-16 DLH6JT FRA → PRG Jul 16, 08:20 UTCJul 16, 09:05 UTC45m
2026-07-16 DLH5KW ARN → FRA Jul 16, 04:30 UTCJul 16, 06:15 UTC1h 45m
2026-07-15 DLH9859 - Jul 15, 17:45 UTCJul 15, 19:50 UTC2h 5m
2026-07-15 DLH5EF FRA → BHX Jul 15, 15:15 UTCJul 15, 16:30 UTC1h 15m
2026-07-15 DLH1HF - Jul 15, 13:40 UTCJul 15, 14:05 UTC25m
2026-07-15 DLH5TV - Jul 15, 12:10 UTCJul 15, 12:40 UTC30m
2026-07-15 DLH4HU - Jul 15, 09:35 UTCJul 15, 10:55 UTC1h 20m
2026-07-15 DLH6EM - Jul 15, 07:20 UTCJul 15, 08:35 UTC1h 15m
2026-07-15 DLH3FL - Jul 15, 03:20 UTCJul 15, 05:40 UTC2h 20m
2026-07-14 DLH7WK FRA → OTP Jul 14, 18:40 UTCJul 14, 20:30 UTC1h 50m
2026-07-14 DLH3CJ - Jul 14, 11:05 UTCJul 14, 12:30 UTC1h 25m
2026-07-14 DLH7AA - Jul 14, 08:50 UTCJul 14, 10:00 UTC1h 10m
2026-07-14 DLH965 - Jul 14, 05:30 UTCJul 14, 07:00 UTC1h 30m
2026-07-13 DLH5EL FRA → EDI Jul 13, 20:20 UTCJul 13, 21:50 UTC1h 30m
2026-07-13 DLH4JE MXP → FRA Jul 13, 17:45 UTCJul 13, 18:50 UTC1h 5m
2026-07-13 DLH6AW FRA → MXP Jul 13, 15:40 UTCJul 13, 16:35 UTC55m
2026-07-13 DLH2WR - Jul 13, 13:05 UTCJul 13, 14:10 UTC1h 5m
2026-07-13 DLH3TT FRA → POZ Jul 13, 11:00 UTCJul 13, 12:00 UTC1h 0m
2026-07-13 DLH4NM - Jul 13, 09:10 UTCJul 13, 09:55 UTC45m
2026-07-13 DLH1UP FRA → MUC Jul 13, 07:30 UTCJul 13, 08:01 UTC30m
2026-07-13 DLH54J - Jul 13, 05:05 UTCJul 13, 06:01 UTC55m
2026-07-12 DLH19E - Jul 12, 20:25 UTCJul 12, 21:15 UTC50m
2026-07-12 DLH279 LIN → FRA Jul 12, 17:45 UTCJul 12, 18:40 UTC55m
2026-07-12 DLH278 FRA → LIN Jul 12, 15:30 UTCJul 12, 16:20 UTC50m
2026-07-12 DLH839 - Jul 12, 13:01 UTCJul 12, 14:10 UTC1h 10m
2026-07-12 DLH5HC FRA → BLL Jul 12, 11:01 UTCJul 12, 12:01 UTC1h 0m
2026-07-12 DLH3EJ DUB → FRA Jul 12, 08:05 UTCJul 12, 09:35 UTC1h 30m
2026-07-12 DLH6LC FRA → DUB Jul 12, 05:15 UTCJul 12, 07:01 UTC1h 45m
2026-07-11 DLH44K MAD → FRA Jul 11, 15:20 UTCJul 11, 17:20 UTC2h 0m
2026-07-11 DLH14C FRA → MAD Jul 11, 11:45 UTCJul 11, 13:50 UTC2h 5m
2026-07-11 DLH9C ZRH → FRA Jul 11, 09:55 UTCJul 11, 10:30 UTC35m
2026-07-11 DLH1KJ FRA → ZRH Jul 11, 08:20 UTCJul 11, 08:55 UTC35m
2026-07-11 DLH7JW - Jul 11, 04:50 UTCJul 11, 06:15 UTC1h 25m
2026-07-10 DLH7YA FRA → WAW Jul 10, 19:35 UTCJul 10, 20:50 UTC1h 15m
2026-07-10 DLH66M - Jul 10, 17:15 UTCJul 10, 18:10 UTC55m
2026-07-10 DLH05K - Jul 10, 15:25 UTCJul 10, 16:25 UTC1h 0m
2026-07-10 DLH4YC - Jul 10, 12:55 UTCJul 10, 14:05 UTC1h 10m
2026-07-10 DLH6UT - Jul 10, 10:20 UTCJul 10, 11:30 UTC1h 10m
2026-07-10 DLH007 HAM → FRA Jul 10, 08:10 UTCJul 10, 09:00 UTC50m
2026-07-10 DLH4EF FRA → HAM Jul 10, 06:20 UTCJul 10, 07:00 UTC40m
2026-07-10 DLH4XV - Jul 10, 04:25 UTCJul 10, 04:50 UTC25m
2026-07-09 DLH078 FRA → DUS Jul 9, 19:20 UTCJul 9, 19:45 UTC25m

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?
No active broadcast right now. Last signal was 2h ago.
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 DLH5EF, DLH8CT, DLH7KH, DLH6UT, DLH5AA.