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IP Checker

IP & networks

What is an ISP?

An internet service provider connects you to the internet and assigns your public IP. Here is what websites can infer from your ISP and connection type.

Layered internet infrastructure connecting global backbones to regional and home access networks

An ISP sits inside a delivery chain that runs from backbone connectivity to the access line reaching a device.

UPSTREAM
backbone
ACCESS
fixed or mobile
OUTPUT
public IP

Check the ISP, network type and certainty level for any IPv4 or IPv6 address.

Look up an IP's ISP

Definition

An internet service provider (ISP) is the company that connects you to the internet: a cable or fibre provider at home, a mobile carrier on your phone, or a corporate network at work. Your public IP comes from the address space your ISP controls.

Connection types

IP intelligence tools classify networks into broad categories: residential (home broadband), mobile (cellular carriers), hosting or datacenter (cloud and server providers), business, education and government.

These labels are inferences. A single company may run home, business and hosting services from related address blocks, which is why this site shows a certainty level (Known, Likely, Inferred, Unavailable) next to each classification rather than presenting it as fact.