| U-143 | Type IID |
| Feldpost Number | M 24 039 |
| Construction Yard | Deutsche Werke AG, Kiel-Gaarden |
| Yard Number | 272 |
| Ordered | 25th Sep 1939 |
| Keel laid | 3rd Jan 1940 |
| Launched | 10th Aug 1940 |
| Commissioned | 18th Sep 1940 |
| Baubelehrung | Baubelehrung U-Boote Ostsee, Kiel |
| Training, Flotillas and Duties |
| 09.40 - 10.40 | 1.U-Flottille, Kiel Ausbildungsboot (under training)
|
| 10.40 - 12.40 | 24.U-Flottille, Danzig Ausbildungsboot (under training)
|
| 01.41 - 04.41 | 22.U-Flottille, Gotenhafen Schulboot (training boat)
|
| 04.41 - 09.41 | 3.U-Flottille, La Pallice Frontboot (operational)
|
| 09.41 - 05.45 | 22.U-Flottille, Gotenhafen.Wilhelmshaven Schulboot (training boat)
|
| Commanders |
| 09.40 - 11.40 | OL Ernst Mengersen see also: U-18 U-101 U-607 |
| 11.40 - 03.41 | OL Helmut Möhlmann see also: U-571 |
| 03.41 - 03.41 | OL Jürgen von Rosenstiel see also: U-502 |
| 03.41 - 11.41 | OL Harald Gelhaus see also: U-107 |
| 11.41 - 04.42 | OL Helmut Manseck see also: U-758 U-3002 U-3007 U-3008 |
| 03.42 - 12.42 | OL Gerhard Groth see also: U-958 U-397 |
| 12.42 - 03.43 | OL Erwin Schwager |
| 02.43 - 05.44 | OL Hans Vogel see also: U-143 U-3001 U-3025 |
| 05.44 - 05.45 | OL Walter Kasparek see also: U-143 |