Every time your phone or computer connects to the internet, it's given a unique numeric label called an IP address (Internet Protocol address). It does exactly what a postal address does for your house: it tells every other device on the internet exactly where to send data so it reaches you.
Without an IP address, no website would know where to send your search results, and no server would know which device to answer.
What does an IP address actually look like?
The most common type you deal with today is IPv4, written as four numbers between 0 and 255 separated by dots, for example:
203.0.113.42
A newer version called IPv6 also exists, covering a vastly larger address space and written as groups of numbers and letters. We cover the differences in full in IPv4 vs IPv6.
Where does your IP address come from?
When you connect to the internet — over mobile data, home Wi-Fi, or at the office — your internet service provider (ISP) assigns your connection a public IP address. That's the address every website you visit actually sees. Meanwhile, every device inside your home or office network (router, laptop, printer) also has a private IP address that only means something inside that local network. We explain the difference in Private vs Public IP.
Does your IP address ever change?
Not necessarily. Most ISPs assign IP addresses dynamically, meaning yours might change when you restart your router or after a few days. Some services and servers instead use a static IP that never changes. The full breakdown is in Static vs Dynamic IP.
Why does my IP address reveal my location?
Blocks of IP addresses are allocated to ISPs and regions and recorded in public databases. That's how a service like this one can estimate your country, city, and ISP from your IP address with reasonably good accuracy — though not GPS-level precision.
How do I check my current IP address?
The simplest way is to open the Show-IP.ir homepage — your public IP address, country, city, ISP, and even connection security status show up instantly, no installation required. If you're on a specific operating system and want to see your local (in-network) IP too, check the platform-specific guide: Windows, Mac, Linux, Android, and iPhone.
Key takeaways
- An IP address is the numeric identifier for any device on the internet — it works like a postal address for data.
- There are two main versions: IPv4 (still the most common) and IPv6 (the newer generation with a much larger address space).
- Every device has both a private IP address (inside its local network) and a public IP address (visible to the internet).
- An IP address can be static or dynamic, depending on the ISP's or server's configuration.
- Checking your current IP address takes seconds — just open the homepage.