IP Lookup: 8 Clear Answers on What an Address Reveals

An IP lookup turns a string of numbers into a country, a region, a network owner and a timezone. It does not turn it into a person or a street address, and that gap is where most of the confusion starts.

Below are the eight questions people ask most often, answered in full. Each answer stands alone, so skip to the one you need.

What is an IP lookup and what does it show?

An IP address is a number assigned to a network connection. On its own it says nothing readable. An IP lookup queries a geolocation database and returns the details that have been matched to that number.

The IP Address Lookup accepts an IPv4 address, an IPv6 address or a domain name, and it can detect your own address when you leave the box empty. The result is a card with the fields below.

How does it know where an address is?

There is no master map of the internet, so an IP lookup works from layered records. The system works in layers, and each layer adds detail.

1. IANA hands out large blocksThe Internet Assigned Numbers Authority allocates pools of addresses to five Regional Internet Registries: AFRINIC, APNIC, ARIN, LACNIC and RIPE NCC.
2. Registries allocate to providersEach registry assigns smaller blocks to internet service providers, hosting companies and large organisations, and records who holds what.
3. Geolocation providers combine dataCompanies such as the service behind this tool match those registry records with their own commercial datasets to estimate a region and a city.
4. Your lookup returns the matchThe tool sends your query to a public geolocation service from your browser and shows the answer. It is one database lookup, not a trace of the route your data takes.

How accurate is it, and why is the city wrong?

Accuracy falls as you zoom in. The country is right almost every time because registries record it. The city is an estimate, and for some kinds of connection it is a poor one.

What this means is that a wrong city in an IP lookup is rarely a bug. The lookup answered the question it can answer, which is where the address block is registered. If you see the wrong city for your own address, check whether you are on a phone or a VPN before you doubt the tool.

What is the difference between IPv4 and IPv6?

IPv4 addresses are 32 bits long and written as four numbers from 0 to 255, such as 203.0.113.7. That allows 2³², or 4,294,967,296 addresses, which turned out to be too few. IPv6 addresses are 128 bits long, written in hexadecimal groups such as 2001:db8::1, and allow about 3.4 × 10³⁸ addresses.

For an IP lookup the result looks the same. You still get a country, a network and a timezone. The practical difference is that IPv6 blocks tend to be allocated in larger, tidier chunks, and some networks give you both an IPv4 and an IPv6 address at once. If a lookup of your address and a friend lookup of theirs disagree on the provider, you may simply be on different protocols.

Why does it fail for some addresses?

Some addresses are not on the public internet, so no database can place them. Private ranges are reserved for use inside homes and offices. RFC 1918 defines three of them.

If you paste 192.168.1.1 into an IP lookup and get an error or an empty card, that is correct. That number is probably your router, and thousands of other routers use the same number. To see an address that can be placed, use the automatic option or look up the public address your router presents to the world.

Can it reveal my name or exact address?

No. A public IP address identifies a connection point such as a router or a carrier gateway. All the devices in a home share one public address, so it cannot single out a phone from a laptop, let alone name the owner.

Providers can link an address to a customer account, but they do that internally and release it only under legal process. Coordinates in a lookup are usually the centre of a region, and a map pin built from them can land in a field or a lake. Treat it as a hint about the general area.

Does a VPN change the result?

Short version first: an IP lookup after a VPN shows the address of the VPN server, not yours.

Yes, and that is the point of one. A VPN routes your traffic through a server, so websites and lookups see the address of that server. If you connect to a server in Frankfurt, a lookup shows a German address owned by the VPN provider or its data centre.

This gives you a quick test. Run an IP lookup before you connect, then again after. The country and the organisation should both change. If they do not, the VPN is not carrying your traffic or the browser is bypassing it. Mobile carriers have a similar effect without any VPN, because several cities may share one gateway.

What a result looks like (illustrative values)

Copy{
  "ip": "203.0.113.7",
  "country_name": "Germany",
  "region": "Hesse",
  "city": "Frankfurt am Main",
  "org": "Example Hosting GmbH",
  "asn": "AS64496",
  "timezone": "Europe/Berlin",
  "utc_offset": "+0100"
}

What is it useful for in daily life?

More IP lookup questions

Sources: IANA, Number Resources · RFC 1918, Address Allocation for Private Internets