IP provider in spam lists, what does it affect?

Question

Email

Good afternoon!
We have a white IP from the provider, as far as we know, it is not issued to anyone else.
We send mail through hosting, we do not use our own smtp servers. Sometimes I do small mailings (about 100 users) via mailchimp (dmarc and other things are configured there).

Recently, for the sake of interest, I checked spam lists, and IP is in a considerable amount.
At the same time, the hosting IP is not listed in them.

Here is an interesting picture on senderscore, I don’t quite understand what their Volume means, but if this is the number of messages that passed through the filter, then it’s extremely strange.

And here are the domains that were noted in the same place:

I can’t imagine how they and our IP are connected, especially lacledecountyarc.

Hacking the access point by neighbors is unlikely (and there were no left MACs in the logs). The workers checked the computers, everything is clean.

So here's what's interesting. If the hosting IP is clean, the domain name is also not listed in the spam lists, then can the presence of the provider's IP in the spam databases affect people getting into spam ?
And where in theory did our IP get there?

Answer 1

IP any constantly fall into the spam database. With enviable frequency. All you have to do is take it out with your hands and that's it.

Answer 2

For example, one of the users caught a virus sending spam. Or someone is tired of your small mailing lists.

can the presence of the provider's IP in the spam databases affect people getting into spam?

Yes, that's what will affect it. Find and eliminate the source of spam, then write to the spamlist admins with a request to remove your address. And for mailings, it’s better to use third-party services such as a unisender.