Apparatus

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sensors Mode-S transponder

3C651A

ICAO 24-bit transponder address · allocated to Germany

Currently assigned to D-AIHZ · AIRBUS A-340-600

Hex
3C651A
Octal
17062432
Decimal
3,958,042
Country
DE
Tail
D-AIHZ
Type
A346
Broadcasting now · callsign DLH417 · 25,000 ft
Flights observed
72
Distinct callsigns
8
Country
DE
Last broadcast
18m ago

Current position

3C651A is currently broadcasting. Map zoomed to live position.

Country allocation

The ICAO 24-bit address 3C651A 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 8 distinct

Callsign Airline Flights Last seen
DLH419 Lufthansa 18 2026-05-25
DLH3W Lufthansa 13 2026-05-25
DLH403 Lufthansa 9 2026-05-13
DLH402 Lufthansa 9 2026-05-13
DLH401 Lufthansa 7 2026-05-26
DLH400 Lufthansa 7 2026-05-26
DLH416 Lufthansa 5 2026-05-29
DLH417 Lufthansa 4 2026-05-29

Recent flights last 50

DateFlightRouteTakeoffLandingDuration
2026-05-29 DLH417 IAD → FRA May 29, 19:40 UTCMay 30, 02:30 UTC6h 50m
2026-05-29 DLH416 FRA → IAD May 29, 09:10 UTCMay 29, 17:15 UTC8h 5m
2026-05-28 DLH417 IAD → FRA May 28, 19:40 UTCMay 29, 03:15 UTC7h 35m
2026-05-28 DLH416 FRA → IAD May 28, 09:05 UTCMay 28, 17:00 UTC7h 55m
2026-05-26 DLH401 JFK → FRA May 26, 20:05 UTCMay 27, 03:14 UTC7h 10m
2026-05-26 DLH400 FRA → JFK May 26, 09:25 UTCMay 26, 17:15 UTC7h 50m
2026-05-25 DLH419 IAD → FRA May 25, 22:44 UTCMay 26, 05:59 UTC7h 15m
2026-05-25 DLH3W FRA → IAD May 25, 12:00 UTCMay 25, 20:34 UTC8h 34m
2026-05-24 DLH401 JFK → FRA May 24, 20:35 UTCMay 25, 03:35 UTC7h 0m
2026-05-24 DLH400 FRA → JFK May 24, 09:15 UTCMay 24, 17:10 UTC7h 55m
2026-05-23 DLH419 IAD → FRA May 23, 23:15 UTCMay 24, 06:30 UTC7h 15m
2026-05-23 DLH3W FRA → IAD May 23, 12:00 UTCMay 23, 20:25 UTC8h 25m
2026-05-22 DLH417 IAD → FRA May 22, 20:05 UTCMay 23, 03:10 UTC7h 4m
2026-05-22 DLH416 FRA → IAD May 22, 09:00 UTCMay 22, 17:20 UTC8h 20m
2026-05-20 DLH401 JFK → FRA May 20, 20:25 UTCMay 21, 03:20 UTC6h 55m
2026-05-20 DLH400 FRA → JFK May 20, 09:25 UTCMay 20, 17:20 UTC7h 55m
2026-05-18 DLH401 JFK → FRA May 18, 20:05 UTCMay 19, 03:10 UTC7h 5m
2026-05-18 DLH400 FRA → JFK May 18, 09:50 UTCMay 18, 17:25 UTC7h 35m
2026-05-16 DLH417 IAD → FRA May 16, 20:05 UTCMay 17, 03:15 UTC7h 10m
2026-05-16 DLH416 FRA → IAD May 16, 15:35 UTCMay 16, 17:30 UTC1h 55m
2026-05-16 DLH416 FRA → IAD May 16, 09:06 UTCMay 16, 15:31 UTC6h 25m
2026-05-15 DLH419 IAD → FRA May 15, 22:25 UTCMay 16, 05:40 UTC7h 15m
2026-05-15 DLH3W FRA → IAD May 15, 11:35 UTCMay 15, 19:50 UTC8h 14m
2026-05-14 DLH419 IAD → FRA May 14, 22:35 UTCMay 15, 05:50 UTC7h 15m
2026-05-14 DLH3W FRA → IAD May 14, 11:40 UTCMay 14, 20:00 UTC8h 20m
2026-05-13 DLH403 EWR → FRA May 13, 22:35 UTCMay 14, 05:45 UTC7h 10m
2026-05-13 DLH402 FRA → EWR May 13, 11:45 UTCMay 13, 20:00 UTC8h 15m
2026-05-12 DLH401 JFK → FRA May 12, 20:20 UTCMay 13, 03:15 UTC6h 55m
2026-05-12 DLH400 FRA → JFK May 12, 09:20 UTCMay 12, 17:30 UTC8h 10m
2026-05-12 DLH403 EWR → FRA May 12, 03:45 UTCMay 12, 05:40 UTC1h 55m
2026-05-11 DLH402 FRA → EWR May 11, 12:20 UTCMay 11, 20:35 UTC8h 16m
2026-05-09 DLH401 JFK → FRA May 9, 20:10 UTCMay 10, 03:14 UTC7h 5m
2026-05-09 DLH400 FRA → JFK May 9, 09:15 UTCMay 9, 17:05 UTC7h 50m
2026-05-08 DLH419 IAD → FRA May 8, 22:50 UTCMay 9, 06:15 UTC7h 25m
2026-05-08 DLH3W FRA → IAD May 8, 11:49 UTCMay 8, 20:10 UTC8h 20m
2026-05-07 DLH403 EWR → FRA May 7, 22:40 UTCMay 8, 05:29 UTC6h 50m
2026-05-07 DLH402 FRA → EWR May 7, 11:45 UTCMay 7, 20:10 UTC8h 25m
2026-05-05 DLH419 IAD → FRA May 5, 22:20 UTCMay 6, 05:55 UTC7h 34m
2026-05-05 DLH3W FRA → IAD May 5, 11:35 UTCMay 5, 19:55 UTC8h 20m
2026-05-03 DLH403 EWR → FRA May 3, 22:20 UTCMay 4, 05:35 UTC7h 15m
2026-05-03 DLH402 FRA → EWR May 3, 11:45 UTCMay 3, 19:40 UTC7h 55m
2026-05-01 DLH401 JFK → FRA May 1, 20:05 UTCMay 2, 03:20 UTC7h 15m
2026-05-01 DLH400 FRA → JFK May 1, 09:15 UTCMay 1, 16:55 UTC7h 40m
2026-05-01 DLH419 IAD → FRA May 1, 03:50 UTCMay 1, 06:00 UTC2h 10m
2026-04-30 DLH419 IAD → FRA Apr 30, 22:20 UTCMay 1, 00:10 UTC1h 50m
2026-04-30 DLH3W FRA → IAD Apr 30, 11:40 UTCApr 30, 19:35 UTC7h 55m
2026-04-29 DLH403 EWR → FRA Apr 29, 22:20 UTCApr 30, 05:45 UTC7h 24m
2026-04-29 DLH402 FRA → EWR Apr 29, 11:45 UTCApr 29, 19:30 UTC7h 45m
2026-04-27 DLH419 IAD → FRA Apr 27, 22:15 UTCApr 28, 05:55 UTC7h 40m
2026-04-27 DLH3W FRA → IAD Apr 27, 11:40 UTCApr 27, 19:45 UTC8h 5m

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

Mode-S 3C651A frequently asked

What is Mode-S code 3C651A?
3C651A is an ICAO 24-bit transponder address. Allocated to Germany. Assigned to D-AIHZ.
Where is Mode-S 3C651A registered?
Mode-S code 3C651A is allocated to Germany (DE). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 3C651A broadcasting right now?
Yes. Mode-S 3C651A is currently airborne.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 3C651A, octal 17062432, decimal 3,958,042.
What flights does 3C651A operate?
Mode-S 3C651A has broadcast 8 distinct callsigns, including DLH419, DLH3W, DLH403, DLH402, DLH401.