sensors Mode-S transponder
3C70C1
ICAO 24-bit transponder address · allocated to Germany
Currently assigned to D-ALFA · BOEING 777-200LR
- Hex
- 3C70C1
- Octal
- 17070301
- Decimal
- 3,961,025
- Country
- DE
- Tail
- D-ALFA
- Type
- B77L
- Flights observed
- 218
- Distinct callsigns
- 20
- Country
- DE
- Last broadcast
- 3h ago
Last known position
Country allocation
The ICAO 24-bit address 3C70C1 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 |
|---|---|---|---|
| GEC8401 | - | 19 | 2026-07-08 |
| GEC8400 | - | 18 | 2026-07-13 |
| GEC8461 | - | 16 | 2026-07-12 |
| GEC8160 | Lufthansa Cargo | 11 | 2026-07-09 |
| GEC8403 | - | 10 | 2026-06-24 |
| GEC8161 | - | 10 | 2026-07-10 |
| GEC8460 | - | 9 | 2026-06-23 |
| GEC8443 | - | 9 | 2026-07-01 |
| GEC8411 | Lufthansa Cargo | 9 | 2026-05-20 |
| GEC8402 | - | 8 | 2026-06-24 |
| GEC8385 | Lufthansa Cargo | 8 | 2026-07-03 |
| GEC8225 | - | 7 | 2026-06-26 |
| GEC8430 | Lufthansa Cargo | 6 | 2026-06-05 |
| GEC8224 | Lufthansa Cargo | 6 | 2026-06-25 |
| GEC8431 | Lufthansa Cargo | 5 | 2026-06-05 |
| GEC8375 | - | 5 | 2026-07-12 |
| GEC8466 | - | 4 | 2026-07-11 |
| GEC8463 | Lufthansa Cargo | 4 | 2026-05-17 |
| GEC8442 | - | 4 | 2026-06-30 |
| GEC8387 | Lufthansa Cargo | 4 | 2026-05-19 |
Recent flights last 50
| Date | Flight | Route | Takeoff | Landing | Duration |
|---|---|---|---|---|---|
| 2026-07-13 | GEC8400 | - | Jul 13, 10:25 UTC | Jul 14, 05:00 UTC | 18h 35m |
| 2026-07-12 | GEC8375 | - | Jul 12, 13:15 UTC | Jul 13, 07:15 UTC | 18h 0m |
| 2026-07-12 | GEC8375 | - | Jul 12, 08:20 UTC | Jul 13, 07:15 UTC | 22h 55m |
| 2026-07-12 | GEC8374 | - | Jul 12, 06:45 UTC | Jul 13, 06:15 UTC | 23h 30m |
| 2026-07-12 | GEC8461 | - | Jul 12, 00:40 UTC | Jul 12, 03:10 UTC | 2h 30m |
| 2026-07-11 | GEC8461 | - | Jul 11, 20:55 UTC | Jul 11, 21:10 UTC | 15m |
| 2026-07-11 | GEC8461 | - | Jul 11, 18:45 UTC | Jul 11, 20:05 UTC | 1h 20m |
| 2026-07-11 | GEC8461 | - | Jul 11, 11:00 UTC | Jul 11, 11:15 UTC | 15m |
| 2026-07-11 | GEC8466 | - | Jul 11, 07:00 UTC | Jul 11, 07:35 UTC | 35m |
| 2026-07-11 | GEC8466 | - | Jul 11, 03:15 UTC | Jul 11, 05:10 UTC | 1h 55m |
| 2026-07-11 | GEC8466 | - | Jul 11, 01:45 UTC | Jul 11, 01:55 UTC | 10m |
| 2026-07-10 | GEC8466 | FRA → BOM | Jul 10, 15:45 UTC | Jul 10, 23:20 UTC | 7h 36m |
| 2026-07-10 | GEC8161 | JFK → FRA | Jul 10, 05:50 UTC | Jul 10, 12:40 UTC | 6h 50m |
| 2026-07-09 | GEC8160 | FRA → JFK | Jul 9, 17:50 UTC | Jul 10, 01:40 UTC | 7h 50m |
| 2026-07-09 | GEC8161 | JFK → FRA | Jul 9, 05:35 UTC | Jul 9, 12:30 UTC | 6h 55m |
| 2026-07-08 | GEC8160 | FRA → JFK | Jul 8, 18:45 UTC | Jul 9, 02:30 UTC | 7h 45m |
| 2026-07-08 | GEC8401 | - | Jul 8, 02:50 UTC | Jul 8, 14:30 UTC | 11h 40m |
| 2026-07-07 | GEC8401 | - | Jul 7, 19:20 UTC | Jul 8, 14:30 UTC | 19h 10m |
| 2026-07-07 | GEC8401 | - | Jul 7, 12:20 UTC | Jul 8, 12:15 UTC | 23h 55m |
| 2026-07-07 | GEC8400 | - | Jul 7, 10:20 UTC | Jul 8, 10:15 UTC | 23h 55m |
| 2026-07-06 | GEC8347 | - | Jul 6, 16:50 UTC | Jul 6, 19:10 UTC | 2h 20m |
| 2026-07-06 | GEC8346 | - | Jul 6, 11:50 UTC | Jul 6, 14:10 UTC | 2h 20m |
| 2026-07-05 | GEC8375 | - | Jul 5, 13:45 UTC | Jul 6, 06:45 UTC | 17h 0m |
| 2026-07-05 | GEC8375 | - | Jul 5, 10:20 UTC | Jul 6, 06:45 UTC | 20h 25m |
| 2026-07-05 | GEC8375 | - | Jul 5, 08:20 UTC | Jul 6, 06:45 UTC | 22h 25m |
| 2026-07-05 | GEC8374 | - | Jul 5, 07:15 UTC | Jul 6, 06:15 UTC | 23h 0m |
| 2026-07-03 | GEC8401 | - | Jul 3, 19:10 UTC | Jul 4, 13:35 UTC | 18h 25m |
| 2026-07-03 | GEC8401 | - | Jul 3, 12:35 UTC | Jul 4, 12:15 UTC | 23h 40m |
| 2026-07-03 | GEC8400 | - | Jul 3, 10:20 UTC | Jul 4, 10:15 UTC | 23h 55m |
| 2026-07-03 | GEC8400 | - | Jul 3, 09:50 UTC | Jul 4, 02:25 UTC | 16h 35m |
| 2026-07-03 | GEC8385 | NRT → FRA | Jul 3, 01:45 UTC | Jul 3, 06:05 UTC | 4h 20m |
| 2026-07-02 | GEC8385 | NRT → FRA | Jul 2, 17:40 UTC | Jul 2, 18:00 UTC | 20m |
| 2026-07-02 | GEC8385 | NRT → FRA | Jul 2, 12:50 UTC | Jul 2, 15:00 UTC | 2h 10m |
| 2026-07-01 | GEC8384 | FRA → NRT | Jul 1, 20:35 UTC | Jul 2, 09:30 UTC | 12h 55m |
| 2026-07-01 | GEC8443 | - | Jul 1, 10:20 UTC | Jul 1, 12:45 UTC | 2h 25m |
| 2026-07-01 | GEC8443 | - | Jul 1, 06:15 UTC | Jul 1, 07:25 UTC | 1h 10m |
| 2026-06-30 | GEC8443 | - | Jun 30, 22:25 UTC | Jun 30, 22:35 UTC | 10m |
| 2026-06-30 | GEC8442 | - | Jun 30, 08:15 UTC | Jun 30, 12:00 UTC | 3h 45m |
| 2026-06-29 | GEC8265 | - | Jun 29, 16:55 UTC | Jun 30, 06:05 UTC | 13h 11m |
| 2026-06-29 | GEC8264 | - | Jun 29, 13:49 UTC | Jun 29, 14:19 UTC | 30m |
| 2026-06-29 | GEC8264 | - | Jun 29, 09:54 UTC | Jun 29, 10:44 UTC | 50m |
| 2026-06-28 | GEC8264 | - | Jun 28, 19:34 UTC | Jun 29, 06:54 UTC | 11h 20m |
| 2026-06-28 | GEC8429 | - | Jun 28, 00:45 UTC | Jun 28, 13:45 UTC | 13h 0m |
| 2026-06-27 | GEC8429 | - | Jun 27, 15:49 UTC | Jun 28, 13:45 UTC | 21h 55m |
| 2026-06-27 | GEC8428 | - | Jun 27, 06:30 UTC | Jun 28, 02:05 UTC | 19h 35m |
| 2026-06-26 | GEC8225 | - | Jun 26, 02:40 UTC | Jun 26, 16:09 UTC | 13h 30m |
| 2026-06-25 | GEC8224 | FRA → MEX | Jun 25, 12:04 UTC | Jun 25, 23:30 UTC | 11h 25m |
| 2026-06-24 | GEC8403 | - | Jun 24, 15:24 UTC | Jun 25, 09:20 UTC | 17h 55m |
| 2026-06-24 | GEC8403 | - | Jun 24, 09:19 UTC | Jun 25, 08:14 UTC | 22h 55m |
| 2026-06-24 | GEC8402 | - | Jun 24, 06:20 UTC | Jun 25, 06:14 UTC | 23h 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-ALFA page for operator, model, and routing details .