ISP / ASN Lookup
Find out which network your traffic actually belongs to.
Where this comes from
Every block of internet addresses belongs to an autonomous system, identified by an AS number. Routing between networks happens between these systems rather than between companies, so the AS behind your connection is the network your traffic genuinely travels on.
What the results mean
- ASN
- The autonomous system number that owns your address range. A stable identifier for the network, unlike your IP.
- Network operator
- The organisation registered against that AS number.
Common problems and fixes
- The operator is not the company I pay
- Common and usually fine. Resellers and mobile virtual network operators sell you service but route traffic over a larger carrier’s network, which is the one shown here.
- It shows a hosting company
- That means your traffic is leaving through a data centre rather than a consumer line — the normal signature of a VPN or proxy.
Frequently asked questions
What is an ASN for?
It identifies a network for routing purposes. Networks announce which address ranges they carry using their AS number, and other networks decide how to reach them from that. It is the layer of the internet most people never see.
Why does my ASN matter?
It is the most reliable way to say which network you are really on. IP addresses get reassigned; the AS behind them is far more stable, and it is what shows whether you are on a consumer ISP or routed through a data centre.