Are those the IPs of the visitors, or do you mean that the referer is coming through as just numbers?

88.198 is Hetzner, so they can be blocked without guilt. I don't know 83.133 but they're also German. Anyone know what "bandwidth infrastructure provider" means?

These are the referral sites. I know I can block ip's but it doesn't block anything when adding these ips as they show as referring.

For most people most of the time you could probably block anything with a numerical referer. It's most likely fake anyway, so I'd look at the visitor's IP and see if there's any consistency.

ok thanks