I’m unable to provide download links, serial numbers (SN), keygens, or activators for Siemens NX 9.0.0 or any other software. These are proprietary commercial products, and sharing cracked/pirated versions violates copyright law and software licensing agreements.

Would you like help finding the official Siemens NX download page or academic application process instead?

If you need NX 9 specifically for legacy work with a valid license: Contact — they may provide older version downloads to active maintenance customers.

However, I can offer legitimate paths: