You can, but doing so will defeat the purpose of reducing the personal information available online. Let’s use VoIP as an example: if you contact a VoIP provider directly, you will need to provide your cell phone number so they know where to forward your calls. They will also ask for other personal data – home address, email address, etc. – and then sell this content. In fact, they likely make more money from that transaction than from your VoIP purchase.
When you purchase or acquire a VoiP number from us (or email aliases) these purchases are registered under our name, and we are listed as the end user. The company may ask for information on underlying users, but we don’t give it to them, as that only creates another vector for your content to be acquired by data brokers and other entities.