sensors Mode-S transponder
3C4AD9
ICAO 24-bit transponder address · allocated to Germany
Currently assigned to D-ABVY · BOEING 747-400
- Hex
- 3C4AD9
- Octal
- 17045331
- Decimal
- 3,951,321
- Country
- DE
- Tail
- D-ABVY
- Type
- B744
- Flights observed
- 93
- Distinct callsigns
- 14
- Country
- DE
- Last broadcast
- 2h ago
Last known position
Country allocation
The ICAO 24-bit address 3C4AD9 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 14 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| DLH780 | Lufthansa | 13 | 2026-05-29 |
| DLH755 | Lufthansa | 11 | 2026-05-23 |
| DLH754 | Lufthansa | 11 | 2026-05-23 |
| DLH781 | Lufthansa | 10 | 2026-05-27 |
| DLH441 | Lufthansa | 8 | 2026-05-21 |
| DLH3CF | Lufthansa | 8 | 2026-05-21 |
| DLH781D | Lufthansa | 7 | 2026-04-18 |
| DLH7K | Lufthansa | 5 | 2026-05-24 |
| DLH780D | Lufthansa | 5 | 2026-04-17 |
| DLH423 | Lufthansa | 5 | 2026-05-24 |
| DLH455 | Lufthansa | 3 | 2026-05-28 |
| DLH454 | Lufthansa | 3 | 2026-05-28 |
| DLH493 | Lufthansa | 2 | 2026-05-05 |
| DLH492 | Lufthansa | 2 | 2026-05-05 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-05-29 | DLH780 | FRA → SIN | May 29, 20:20 UTC | May 30, 03:20 UTC | 7h 0m |
| 2026-05-28 | DLH455 | SFO → FRA | May 28, 22:30 UTC | May 29, 08:50 UTC | 10h 20m |
| 2026-05-28 | DLH454 | FRA → SFO | May 28, 09:30 UTC | May 28, 20:15 UTC | 10h 45m |
| 2026-05-27 | DLH781 | SIN → FRA | May 27, 16:10 UTC | May 28, 05:00 UTC | 12h 50m |
| 2026-05-26 | DLH780 | FRA → SIN | May 26, 20:05 UTC | May 27, 07:20 UTC | 11h 16m |
| 2026-05-24 | DLH423 | BOS → FRA | May 24, 23:00 UTC | May 25, 04:50 UTC | 5h 50m |
| 2026-05-24 | DLH7K | FRA → BOS | May 24, 12:20 UTC | May 24, 19:45 UTC | 7h 25m |
| 2026-05-23 | DLH755 | BLR → FRA | May 23, 22:25 UTC | May 24, 07:50 UTC | 9h 25m |
| 2026-05-23 | DLH754 | FRA → BLR | May 23, 20:00 UTC | May 23, 20:10 UTC | 10m |
| 2026-05-23 | DLH754 | FRA → BLR | May 23, 11:40 UTC | May 23, 18:35 UTC | 6h 56m |
| 2026-05-22 | DLH755 | BLR → FRA | May 22, 23:20 UTC | May 23, 07:55 UTC | 8h 34m |
| 2026-05-22 | DLH755 | BLR → FRA | May 22, 22:35 UTC | May 22, 22:45 UTC | 10m |
| 2026-05-22 | DLH754 | FRA → BLR | May 22, 19:50 UTC | May 22, 20:00 UTC | 10m |
| 2026-05-22 | DLH754 | FRA → BLR | May 22, 11:35 UTC | May 22, 18:25 UTC | 6h 50m |
| 2026-05-21 | DLH441 | IAH → FRA | May 21, 21:55 UTC | May 22, 06:20 UTC | 8h 25m |
| 2026-05-21 | DLH3CF | ARN → FRA | May 21, 09:00 UTC | May 21, 19:25 UTC | 10h 25m |
| 2026-05-20 | DLH781 | SIN → FRA | May 20, 16:15 UTC | May 21, 04:25 UTC | 12h 10m |
| 2026-05-19 | DLH780 | FRA → SIN | May 19, 20:05 UTC | May 20, 07:40 UTC | 11h 36m |
| 2026-05-18 | DLH755 | BLR → FRA | May 18, 23:20 UTC | May 19, 07:35 UTC | 8h 15m |
| 2026-05-18 | DLH755 | BLR → FRA | May 18, 22:35 UTC | May 18, 22:45 UTC | 10m |
| 2026-05-18 | DLH754 | FRA → BLR | May 18, 19:55 UTC | May 18, 20:10 UTC | 15m |
| 2026-05-18 | DLH754 | FRA → BLR | May 18, 11:25 UTC | May 18, 18:30 UTC | 7h 4m |
| 2026-05-17 | DLH755 | BLR → FRA | May 17, 23:35 UTC | May 18, 07:25 UTC | 7h 50m |
| 2026-05-17 | DLH754 | FRA → BLR | May 17, 11:35 UTC | May 17, 13:45 UTC | 2h 10m |
| 2026-05-16 | DLH441 | IAH → FRA | May 16, 21:00 UTC | May 17, 06:10 UTC | 9h 10m |
| 2026-05-16 | DLH3CF | ARN → FRA | May 16, 08:20 UTC | May 16, 18:30 UTC | 10h 10m |
| 2026-05-14 | DLH441 | IAH → FRA | May 14, 21:50 UTC | May 15, 06:55 UTC | 9h 5m |
| 2026-05-14 | DLH3CF | ARN → FRA | May 14, 08:40 UTC | May 14, 18:40 UTC | 10h 0m |
| 2026-05-13 | DLH423 | BOS → FRA | May 13, 22:25 UTC | May 14, 05:05 UTC | 6h 40m |
| 2026-05-13 | DLH7K | FRA → BOS | May 13, 11:55 UTC | May 13, 19:20 UTC | 7h 25m |
| 2026-05-12 | DLH455 | SFO → FRA | May 12, 22:40 UTC | May 13, 08:30 UTC | 9h 50m |
| 2026-05-12 | DLH454 | FRA → SFO | May 12, 08:50 UTC | May 12, 19:45 UTC | 10h 55m |
| 2026-05-11 | DLH423 | BOS → FRA | May 11, 22:30 UTC | May 12, 04:45 UTC | 6h 15m |
| 2026-05-11 | DLH7K | FRA → BOS | May 11, 12:35 UTC | May 11, 19:55 UTC | 7h 20m |
| 2026-05-10 | DLH441 | IAH → FRA | May 10, 21:30 UTC | May 11, 06:30 UTC | 9h 0m |
| 2026-05-10 | DLH3CF | ARN → FRA | May 10, 08:30 UTC | May 10, 18:49 UTC | 10h 20m |
| 2026-05-09 | DLH781 | SIN → FRA | May 9, 18:55 UTC | May 10, 04:34 UTC | 9h 40m |
| 2026-05-09 | DLH781 | SIN → FRA | May 9, 16:20 UTC | May 9, 16:45 UTC | 25m |
| 2026-05-08 | DLH780 | FRA → SIN | May 8, 20:25 UTC | May 9, 07:50 UTC | 11h 25m |
| 2026-05-07 | DLH781 | SIN → FRA | May 7, 18:55 UTC | May 8, 05:00 UTC | 10h 4m |
| 2026-05-07 | DLH781 | SIN → FRA | May 7, 16:20 UTC | May 7, 16:40 UTC | 20m |
| 2026-05-07 | DLH780 | FRA → SIN | May 7, 07:25 UTC | May 7, 07:45 UTC | 20m |
| 2026-05-06 | DLH780 | FRA → SIN | May 6, 20:15 UTC | May 7, 04:50 UTC | 8h 35m |
| 2026-05-05 | DLH493 | YVR → FRA | May 5, 23:30 UTC | May 6, 08:45 UTC | 9h 15m |
| 2026-05-05 | DLH492 | FRA → YVR | May 5, 11:45 UTC | May 5, 21:15 UTC | 9h 30m |
| 2026-05-04 | DLH755 | BLR → FRA | May 4, 22:55 UTC | May 5, 07:10 UTC | 8h 15m |
| 2026-05-04 | DLH754 | FRA → BLR | May 4, 19:35 UTC | May 4, 19:45 UTC | 10m |
| 2026-05-04 | DLH754 | FRA → BLR | May 4, 11:10 UTC | May 4, 18:15 UTC | 7h 5m |
| 2026-05-03 | DLH441 | IAH → FRA | May 3, 21:05 UTC | May 4, 06:20 UTC | 9h 15m |
| 2026-05-03 | DLH3CF | ARN → FRA | May 3, 08:30 UTC | May 3, 18:40 UTC | 10h 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-ABVY page for operator, model, and routing details .