What is my iPhone 8 Plus primary DNS

Hey there Bootheel573,

Thanks so much for using Apple Support Communities.

We would recommend that you reach out to your Internet provider to go over the appropriate information to use for your DNS settings on your iPhone 8. They will be able to get some more information and share the best configuration possible for your network and devices. These settings can vary depending on your network setup so they are going to be in the best position to assist you further. In the meantime, this article has some good information on various Wi-Fi router and network settings that may be helpful: Recommended settings for Wi-Fi routers and access points - Apple Support

We hope that this information is helpful.

​Have a great day!