Which of the following data can be tracked?

Question

Information Security

If you visit a website using a smartphone, which of the following data can be tracked:
1. ip address
2. mac address of the smartphone
3. serial number of the smartphone
4. IMEI of the smartphone
5. model number of the smartphone
Or all that can be tracked is the approximate location of the smartphone ? (country, region)
If something is missing from the list, please add it.

Answer 1

Theoretically, everything. Practically - it depends on which site, which smartphone. There is an API for requesting this whole thing, and if it is, you can pull it. The only question is whether a particular browser can do it.

Answer 2

ip address and user agent.