Enter an IP address or a domain name. See the country and city it is registered to on a map, the network and organisation behind it and its reverse DNS name. Leave the field empty to look up your own address.
The address you enter is looked up in public registry data (RIPEstat by the RIPE NCC); a domain name is resolved through Cloudflare DNS. Upzilla does not store it.
An IP address does not contain a location. What exists are registry records — which organisation holds which block of addresses, and in which country it is registered — and commercial databases that refine those records with measurements, user-submitted corrections and data from internet providers. A geolocation lookup simply finds the block your address falls in and returns what is known about that block.
Right for the great majority of addresses. Wrong mostly for VPNs, satellite links and recently transferred blocks.
Often the provider's regional hub rather than the user. Mobile networks may show a city hundreds of kilometres away.
The marker is the centre of an area. Nobody can find a house from an IP address without the provider's own records.
The ASN, the announced prefix and the holding organisation come from routing and registry data and are factual.
The ASN (autonomous system number) identifies the network that announces the address to the rest of the internet — an internet provider, a hosting company, a cloud platform or a large organisation. The organisation name tells you which one. That is usually the most useful line on the page: it separates a residential customer from a data centre, a corporate network from a VPN service, and tells you whom to contact about abuse.
The announced prefix is the block the address is routed in, and the reverse DNS name is whatever the operator chose to publish for it — often a hint at the location or role, such as a city code in a router name. Use the prefix when you need to allow or block the whole network rather than a single address.
Checking where a login or an order came from. Working out which provider hosts a site before reporting abuse. Confirming that a CDN or a VPN exit is in the country you expect. Seeing why a visitor is shown the wrong language or blocked by a regional rule. Investigating an address that keeps appearing in server logs.
At country level, very. At city level it is an estimate: the reported city is often where the provider's equipment is, not where the user is. It can never identify a street or a household.
Providers move address blocks between regions, and databases lag behind. Mobile and satellite connections, corporate networks and VPNs all leave the internet somewhere other than where you sit.
You can see the network and the organisation that operates it. The individual customer is known only to that provider, which discloses it to authorities under a legal process.
Yes. Enter either kind of address. A domain name is first resolved to its addresses, and the first one is looked up.
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