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What is my IP address?


Your IP is:

Useful information about your IP

IP addresses direct streams of data in the right direction

Every device with access to the internet has an IP address. It ensures that data is sent to the right recipient. Without you noticing, your IP address is used when you open a webpage and when you send emails. Your IP address is always assigned by your internet provider. Usually it consists of dynamically generated combinations of numbers and letters. Each new dial-up of the router leads to a new IP address.
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How IP addresses are constructed

Two types of IP addresses are distributed for surfing the Internet: IPv4 and IPv6 addresses, IPv4 being the old standard. IPv4 addresses consist of four blocks of numbers between 0 and 225 divided by full stops. The fast growth of the internet necessitated a new standard to ensure that more and more IP addresses could be generated. For this reason, the IPv6 method was introduced, although it is still a relatively uncommon practice. While IPv4 addresses consist only of numbers and full stops, IPv6 also uses letters in combination with colons and numbers.
Graphical display: IPv6 address

Safe assignment and data protection

To the average internet user an IP address will appear as no more than a random sequence of numbers, but in fact the numbers are assigned according to exact rules. For example, they contain information about the respective internet provider, or convey the location of the dial-up node. The laws on saving information, like browsing history, vary from country to country.
Graphical display: IP data transfer; Data transmission

Set up your own small server with your IP address

What is my IP address and how can I find out? Most internet users never have to consider these kinds of questions, as IP addresses are exchanged completely automatically in the background without the user having to take notice. However, if you want to externally access a network or a router, or allow third party access, you usually need to know the IP address. Installing an SFTP server or joining the server of a game like Minecraft require you to enter the IP address.
Graphical display: Server IO address
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Your personal consultant

At IONOS, you have a dedicated contact person for personalized advice, tips to boost your online success, and technical support. Reach them via phone, chat and email, all at no cost to you as an IONOS customer.

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More free IONOS tools

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Website Checker

The IONOS Website Checker analyses your website to see how well equipped it is for online success, and gives you tips on how you can improve it. You can implement many of these tips immediately yourself. The Website Checker analyses the source code of your website.
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Domain Check

Test your perfect domain name with the easy to use IONOS domain checker and get suggestions for available domains. The Domain Check tests for availability with classic extensions like .co.uk, and .net, as well as with a huge selection of new top-level domains like .global.
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Whois Domain Lookup

With the Whois Lookup service, you will receive publicly available information about any registered domain name. This service may help you look up who owns a given domain, and whether it is still available or not.

IP address lookup

FAQ – Frequently asked questions

The IP address ensures that data arrives where it is supposed to. Every computer that is connected to the internet is part of a network. Within this network data is constantly sent and received. The IP address is a kind of individual identification number that enables targeted data exchange. For example, if you open a website, your browser transmits your IP address to the web server of the website. The web server then knows exactly where to send the data. Our IP Checker can show you this public IP address. As the IP address is provided by the server, it is not possible to change an IP address so it contains a specific sequence of numbers. However, restarting the router does cause a new random address to be reissued by the provider.

Beyond this, internal IP addresses are assigned within local networks and are not outwardly visible. This means that each device that dials in to a private wireless network is allocated its own IP address. The router automatically generates an IP address that changes with each browsing session. The Windows "ipconfig" command allows you to access the address data of a device in a local network. Mac OS users must enter "ipconfig" in the terminal. The router itself also has an IP address, which can be viewed using the same command. The IP address of the router is often called the standard gateway and consists of a static sequence of numbers, commonly or You can set up a fixed IP address in the network settings.

Usually the IP address is generated dynamically with every new browsing session through the internet provider. This means that every new dial-up generates a new IP address or at least once a day. This has the advantage that the assignment of IP addresses is done more efficiently, as all users are never online at the same time, and the dynamic method can also take the unused addresses into consideration. Dynamic IP addresses also contribute to online safety, as they make identification and external attacks more difficult.

Along with dynamic IP addresses, static addresses are also used – most commonly if the IP in question belongs to a website, as websites are supposed to be easy to find for the users. This is why the Domain Name System (DNS) was introduced. A domain like ionos.co.uk is much easier to remember than a seemingly meaningless number sequence. Every domain in turn leads to a web server with a fixed IP Address.

When it comes to IP addresses, we differentiate between IPv4 and IPv5 addresses. An IPv4 address consists of four blocks of numbers divided by a full stop. In each block, any number between 0 and 225 can be used, which results in roughly 4.3 billion possible addresses. As the internet has grown so rapidly over the last few years, and will continue to grow in the future, this number is quickly becoming insufficient. This is why the IPv6 format is currently being introduced as the new norm, which can generate roughly a sextillion new addresses. The structure of IPv6 addresses is less clear, as it uses both numbers and letters in eight separate blocks.

Your IP address is never just a random sequence of numbers or letters. Specific IP areas are allocated to certain providers, or to big companies. There is no country code, like the one found in telephone numbers, when it comes to IP addresses though. Rather the IP address can be found through the so-called dial-up node. It also shows which browser and operating system is being used. The internet provider can receive information on the user's online behavior during a web browsing session through the IP address. The regulations on what happens to this data after the browsing session is finished also varies depending on the country.

For security reasons, a router will block attempts to externally access a local network. However, in certain cases allowing external access can be beneficial. For example, this allows for you to provide others access to your network via Secure File Transfer Protocol (SFTP), and thereby set up a server to transfer your files. Everyone who would like to provide their friends with a small gaming server in their home network needs the IP address to do so. Minecraft and other games specifically offer game server software for this purpose.

To subvert the router's firewall, so called "ports" are enabled to allow external access. To dial in to the game server, gamers need the IP address of the server. The exact configuration of the firewall depends on both the operating system and on the game server or SFTP software.