What are "non sequential IP's" - Doh

Hi guys, This is not for seo purposes but it seemed like the best place to ask since you guys deal with proxies in this subforum.

I'm currently buying shared proxy's from a proxy provider, but I'm not happy with the *uniformity* of the IP ranges.

When I order 100 proxies from them, I get three random cities and the IP ranges are extremely easy to spot

For example I might get 90 proxies all with the following format

60 x 23.247.151.xxx
30 x 23.108.800.xxx

This is a huge fingerprint for my purposes.

I've read through the marketplace and some seller's provide "non-sequential ip's". That sounds like what I need, but I may be totally off (and it means something completely different).

I'm looking for semi-private proxies (eg shared with 3 people at the most) which have a large variety of IP configurations.

I understand every town has its own IP range, but there are thousands of towns in the US. Perhaps it is unrealistic to expect a large variety of IP ranges since these proxy providers are running their servers from particular locations, but I really do need something better than buying 100 ip's and 60 of them all have the format 23.247.151.xxx

Can someone point me in the right direction? Would really be appreciated.

Thanks

Possible to share the purpose of need via PM fine too if it's too private to share at public.

So better advice you accordingly.