... I don't believe it's a violation of data privacy. ... IP addresses are assigned to Internet Service Providers (ISPs) and large networks -- not individuals like you and me. They, in turn, grant us these addresses so we can get online. However, IP addresses aren't unique to our computers or mobile phones. The address changes when we use a different network, such as an internet cafe; a university; or a workplace.
A reply to a response in "Looking up IP Addresses" (coursera.org).
Related: "Cybersecurity and Cyberwar" (2020)
Related: OneTrust Privacy Professional (Notes)
Related: "Weapons of Math Destruction" (2020)
Related: Digital Divide