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What is an IP address?
An IP address is a number that identifies a device on a network, the way a postal address identifies a building. Every phone, laptop, and server on the internet has one, and every piece of data you send or receive is addressed with them. When your browser opens a website, it is really connecting to the server's IP address — the domain name is just the human-friendly label on top.
IPv4, IPv6, and why there are two
The classic format, IPv4, looks like 203.0.113.42 — four numbers up to 255. That gives about 4.3 billion possible addresses, which sounded infinite in the 1980s and ran out in practice years ago. The replacement, IPv6, looks like 2001:db8::7334 and has more addresses than there are grains of sand on Earth, by a comfortable margin.
The internet runs both side by side today. You don't have to care which one you're using — but it's why some addresses look short and numeric and others look long and hexadecimal.
Why your IP address keeps changing
Most home and mobile connections get a dynamic IP: your provider leases you an address from a pool, and it can change when your router reboots or the lease expires. Servers hosting websites generally sit behind static or stable addresses, so the world can always find them.
This is also why an IP address identifies a connection, not a person: several devices in your home share one public address, and yesterday's address may belong to someone else today.
What this means for your website
Visitors never type your server's IP — they type your domain, and DNS (the internet's phone book) translates it. That indirection is what lets us move your site to stronger infrastructure, add a CDN, or fail over to a backup server without your customers noticing anything.
When we deploy client systems, addresses, DNS, and certificates are wired together as one design — which is why things like changing hosting or adding a subdomain are routine operations instead of outages.
FAQ
Can someone find me from my IP address?
Only roughly. An IP usually maps to a provider and a city-level area, not to a name or a street. Precise identification requires the provider's records, which are only released under legal process.
Is an IP address the same as a domain name?
No. The IP is the numeric address machines use; the domain is the human label. DNS translates the domain to the IP every time you visit a site — that separation is what lets sites change servers without changing their name.
Does my website need its own dedicated IP?
Usually not. Modern hosting and TLS let many sites share infrastructure safely. Dedicated addresses matter in specific cases — certain compliance setups or email-sending reputations — and we'll flag it if your project is one of them.