Shipyards
Deutsche Werft AG, Hamburg
113 commissioned U-boats
| Type | Boats | Werk | Built during | |
| IXC | U-501 - U-506 | 6 boats | 291 - 296 | 1939 - 1941 |
| IXC | U-507 - U-518 | 12 boats | 303 - 314 | 1939 - 1942 |
| IXC | U-519 - U-524 | 6 boats | 334 - 339 | 1940 - 1942 |
| IXC/40 | U-525 - U-532 | 8 boats | 340 - 347 | 1940 - 1942 |
| IXC/40 | U-533 - U-538 | 6 boats | 351 - 356 | 1941 - 1943 |
| IXC/40 | U-539 - U-550 | 12 boats | 360 - 371 | 1941 - 1943 |
| IXC/40 | U-1221 - U-1235 | 15 boats | 384 - 398 | 1941 - 1944 |
| XXIII | U-2321 - U-2331 | 11 boats | 475 - 485 | 1943 - 1944 |
| XXIII | U-2334 - U-2369 | 36 boats | 488 - 523 | 1943 - 1945 |
| XXIII | U-2371 | 525 | 1944 - 1945 |
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