According to the EU GDPR Compliant personal data is everything listen below:
Quote:
"We mentioned personal data when we talked about data subjects, and it is now time to dive a bit deeper into the terminology. In short, personal data is anything that discloses your identity, that is unique to you. A few examples include:"
"Full Name:
Your Home Adress:
Credit Card Number:
Birthdate:
A Photo:
Your Email Adress:
Classical Personal Data:
Name. Home Adress. Phone Number. Birthdate/Place of birth. Your ID card. Workplace / School.
Digital Personal Data:
Metadata. IP Adress (unless visiting websites on your own accord etc.) And Email Adress."
Your IP (some exceptions), or location, is personal.
"IP's are not expected to be private information".
TL;DR if someone is using a 3rd party program or outsource code / app that gives you information about a person that isnt intended to be given out, thats illegal.