No, we do not honor requests for different /24 subnets, or blocks. IP addresses are assigned randomly from our pool. The only way to ensure two different /24 subnets with our hosting is by using two different locations.
The reason for nameserver requirements of two different IP addresses in two different subnets was meant to ensure the addresses were in two different datacenters to begin with so this is an easy solution as we have multiple datacenters to choose from.
For SEO purposes, this has been confirmed as a myth by the largest search engines for quite some time. The only reason different subnets would help is if you had multiple sites with similar content so they aren’t grouped together. If you have unique content on your web site, the IP address does not make a difference.