Where the data comes from
Every block of addresses is registered to a company in one of five regional registries (ARIN, RIPE, APNIC, LACNIC, AFRINIC). That public record gives the owner and its network number. The city comes from location databases that map each block to where the owner uses it, learned from routing and from the owner’s own notes.
This page reads a monthly copy of that data on Teal’s own server. Nothing you type leaves it, and nothing is kept.
What it tells you
The country is reliable. The region and city are the provider’s best-known place for that block, often right, sometimes a hub city away. The owner tells you whether an address is a home provider, a mobile carrier, a university, a company or a hosting firm, which is the most useful line when you are checking where a visitor, a login or an email really came from.
A reverse name, when the owner has set one, often repeats the story: a home line, a mobile gateway or a server in a data centre.
What it cannot tell you
No lookup gives a person’s name, street address, phone number or exact position. Only the provider knows which customer used an address at a given minute, and it releases that only to a court. Sites that promise more are guessing or selling data they should not have.
If you want your own address to say less, connect through Teal VPN: every site then sees the Teal server’s registration instead of yours.