sensors Mode-S transponder
3C4B23
ICAO 24-bit transponder address · allocated to Germany
Currently assigned to D-ABYC · BOEING 747-8
- Hex
- 3C4B23
- Octal
- 17045443
- Decimal
- 3,951,395
- Country
- DE
- Tail
- D-ABYC
- Type
- B748
- Flights observed
- 55
- Distinct callsigns
- 18
- Country
- DE
- Last broadcast
- 19m ago
Last known position
Country allocation
The ICAO 24-bit address 3C4B23 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 18 distinct
| Callsign | Airline | Flights | Last seen |
|---|---|---|---|
| DLH463 | Lufthansa | 6 | 2026-05-20 |
| DLH462 | Lufthansa | 6 | 2026-05-20 |
| DLH573 | Lufthansa | 5 | 2026-05-22 |
| DLH572 | Lufthansa | 5 | 2026-05-21 |
| DLH506 | Lufthansa | 4 | 2026-05-24 |
| DLH457 | Lufthansa | 4 | 2026-06-02 |
| DLH456 | Lufthansa | 4 | 2026-06-02 |
| DLH507 | Lufthansa | 3 | 2026-05-25 |
| DLH499 | Lufthansa | 3 | 2026-05-27 |
| DLH498 | Lufthansa | 3 | 2026-05-26 |
| DLH431 | Lufthansa | 3 | 2026-05-29 |
| DLH430 | Lufthansa | 3 | 2026-05-29 |
| DLH7K | Lufthansa | 1 | 2026-04-27 |
| DLH441 | Lufthansa | 1 | 2026-05-31 |
| DLH423 | Lufthansa | 1 | 2026-04-27 |
| DLH403 | Lufthansa | 1 | 2026-06-01 |
| DLH402 | Lufthansa | 1 | 2026-06-01 |
| DLH3CF | Lufthansa | 1 | 2026-05-31 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-06-02 | DLH457 | LAX → FRA | Jun 2, 22:55 UTC | Jun 3, 08:45 UTC | 9h 50m |
| 2026-06-02 | DLH456 | FRA → LAX | Jun 2, 09:30 UTC | Jun 2, 20:25 UTC | 10h 55m |
| 2026-06-01 | DLH403 | EWR → FRA | Jun 1, 22:45 UTC | Jun 2, 05:15 UTC | 6h 30m |
| 2026-06-01 | DLH402 | FRA → EWR | Jun 1, 12:15 UTC | Jun 1, 19:45 UTC | 7h 30m |
| 2026-05-31 | DLH441 | IAH → FRA | May 31, 21:55 UTC | Jun 1, 06:45 UTC | 8h 50m |
| 2026-05-31 | DLH3CF | ARN → FRA | May 31, 09:15 UTC | May 31, 19:05 UTC | 9h 50m |
| 2026-05-29 | DLH431 | ORD → FRA | May 29, 22:40 UTC | May 30, 06:30 UTC | 7h 50m |
| 2026-05-29 | DLH430 | FRA → ORD | May 29, 09:40 UTC | May 29, 17:55 UTC | 8h 15m |
| 2026-05-27 | DLH499 | MEX → FRA | May 27, 02:59 UTC | May 27, 13:15 UTC | 10h 15m |
| 2026-05-26 | DLH498 | FRA → MEX | May 26, 12:40 UTC | May 27, 00:10 UTC | 11h 30m |
| 2026-05-25 | DLH507 | GRU → FRA | May 25, 21:40 UTC | May 26, 08:15 UTC | 10h 35m |
| 2026-05-24 | DLH506 | FRA → GRU | May 24, 20:45 UTC | May 25, 08:10 UTC | 11h 25m |
| 2026-05-23 | DLH457 | LAX → FRA | May 23, 22:30 UTC | May 24, 08:45 UTC | 10h 15m |
| 2026-05-23 | DLH456 | FRA → LAX | May 23, 09:10 UTC | May 23, 20:15 UTC | 11h 6m |
| 2026-05-22 | DLH573 | JNB → FRA | May 22, 17:30 UTC | May 23, 03:40 UTC | 10h 9m |
| 2026-05-21 | DLH572 | FRA → JNB | May 21, 20:40 UTC | May 22, 06:15 UTC | 9h 35m |
| 2026-05-20 | DLH463 | MIA → FRA | May 20, 21:10 UTC | May 21, 05:40 UTC | 8h 30m |
| 2026-05-20 | DLH462 | FRA → MIA | May 20, 09:10 UTC | May 20, 18:40 UTC | 9h 30m |
| 2026-05-19 | DLH463 | MIA → FRA | May 19, 21:20 UTC | May 20, 05:50 UTC | 8h 31m |
| 2026-05-19 | DLH462 | FRA → MIA | May 19, 09:15 UTC | May 19, 18:30 UTC | 9h 15m |
| 2026-05-18 | DLH463 | MIA → FRA | May 18, 21:20 UTC | May 19, 05:45 UTC | 8h 25m |
| 2026-05-18 | DLH462 | FRA → MIA | May 18, 09:15 UTC | May 18, 18:40 UTC | 9h 24m |
| 2026-05-16 | DLH457 | LAX → FRA | May 16, 22:35 UTC | May 17, 08:30 UTC | 9h 55m |
| 2026-05-16 | DLH456 | FRA → LAX | May 16, 09:01 UTC | May 16, 19:55 UTC | 10h 55m |
| 2026-05-15 | DLH463 | MIA → FRA | May 15, 21:35 UTC | May 16, 05:35 UTC | 8h 0m |
| 2026-05-15 | DLH462 | FRA → MIA | May 15, 09:00 UTC | May 15, 18:35 UTC | 9h 34m |
| 2026-05-14 | DLH573 | JNB → FRA | May 14, 17:20 UTC | May 15, 03:25 UTC | 10h 5m |
| 2026-05-13 | DLH572 | FRA → JNB | May 13, 20:35 UTC | May 14, 06:25 UTC | 9h 50m |
| 2026-05-12 | DLH507 | GRU → FRA | May 12, 22:01 UTC | May 13, 08:50 UTC | 10h 50m |
| 2026-05-12 | DLH506 | FRA → GRU | May 12, 06:40 UTC | May 12, 08:10 UTC | 1h 30m |
| 2026-05-11 | DLH506 | FRA → GRU | May 11, 20:30 UTC | May 12, 06:05 UTC | 9h 35m |
| 2026-05-10 | DLH507 | GRU → FRA | May 10, 21:40 UTC | May 11, 08:05 UTC | 10h 25m |
| 2026-05-09 | DLH506 | FRA → GRU | May 9, 20:30 UTC | May 10, 08:25 UTC | 11h 55m |
| 2026-05-03 | DLH573 | JNB → FRA | May 3, 17:45 UTC | May 4, 03:45 UTC | 10h 0m |
| 2026-05-02 | DLH572 | FRA → JNB | May 2, 20:35 UTC | May 3, 06:15 UTC | 9h 39m |
| 2026-05-02 | DLH499 | MEX → FRA | May 2, 02:55 UTC | May 2, 13:15 UTC | 10h 20m |
| 2026-05-01 | DLH498 | FRA → MEX | May 1, 11:55 UTC | May 1, 23:40 UTC | 11h 45m |
| 2026-04-30 | DLH463 | MIA → FRA | Apr 30, 21:15 UTC | May 1, 06:10 UTC | 8h 55m |
| 2026-04-30 | DLH462 | FRA → MIA | Apr 30, 09:05 UTC | Apr 30, 18:30 UTC | 9h 25m |
| 2026-04-27 | DLH423 | BOS → FRA | Apr 27, 22:00 UTC | Apr 28, 04:40 UTC | 6h 40m |
| 2026-04-27 | DLH7K | FRA → BOS | Apr 27, 12:30 UTC | Apr 27, 19:40 UTC | 7h 10m |
| 2026-04-26 | DLH463 | MIA → FRA | Apr 26, 22:15 UTC | Apr 27, 06:45 UTC | 8h 30m |
| 2026-04-26 | DLH462 | FRA → MIA | Apr 26, 09:55 UTC | Apr 26, 19:25 UTC | 9h 30m |
| 2026-04-25 | DLH573 | JNB → FRA | Apr 25, 17:40 UTC | Apr 26, 03:35 UTC | 9h 55m |
| 2026-04-24 | DLH572 | FRA → JNB | Apr 24, 20:40 UTC | Apr 25, 06:30 UTC | 9h 50m |
| 2026-04-23 | DLH457 | LAX → FRA | Apr 23, 22:35 UTC | Apr 24, 08:45 UTC | 10h 10m |
| 2026-04-23 | DLH456 | FRA → LAX | Apr 23, 09:15 UTC | Apr 23, 20:10 UTC | 10h 54m |
| 2026-04-22 | DLH431 | ORD → FRA | Apr 22, 21:50 UTC | Apr 23, 05:55 UTC | 8h 5m |
| 2026-04-22 | DLH430 | FRA → ORD | Apr 22, 09:20 UTC | Apr 22, 17:50 UTC | 8h 30m |
| 2026-04-21 | DLH431 | ORD → FRA | Apr 21, 22:20 UTC | Apr 22, 06:15 UTC | 7h 55m |
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-ABYC page for operator, model, and routing details .