iPhone 8+ iOS 11.3

The below request is locking me out of using my phone.

Authentication Required” to log this area on:

”services.premeirenet-works.com:443“

Password will be sent securely, followed by logon space and password. I cannot find the domain.

The only way to stop is a reboot except it returns with in a few minutes. I have deleted a number of apps and done a hard reset.

Don’t know if it is a bug or what. It started 2 days ago, my wife has an iPhone 8, no issue.

Any ideas?