What Is an IP Address? (Explained Over Brunch)

Every device that touches the internet has an IP address. It's how the internet knows where to send your stuff. That's it. That's the whole concept. Now let's get into the details, because the details are where it gets good.

The salon appointment analogy

Think of your IP address like your appointment number at the salon. When you check in, the front desk knows it's you, which chair you're at, and which services are yours. Your IP works the same way: when you visit a website, your connection hands over a number that says "send the page to this address, please."

Without it, nothing works. If you ask Netflix for a show and don't tell it where to deliver, that show has nowhere to go. Every request you make online carries your IP as the return address.

What an IP actually looks like

There are two versions in use today. IPv4 is the classic format: four numbers between 0 and 255, separated by dots, like 146.70.170.3. The problem is there are only about 4.3 billion possible IPv4 addresses, and the world burned through them years ago.

IPv6 is the fix: a longer format with letters and colons, like 2a03:1b20:1:f410::42. It allows 340 undecillion addresses. That's a 39-digit number. We will not run out.

Public vs private: the two IPs you have right now

Your router gets one public IP from your internet provider. That's the one websites see. Inside your home, the router hands out private IPs to each device: your phone, your laptop, your smart TV. These usually look like 192.168.1.x and they only exist inside your network.

So when your phone and your laptop both browse the web, the outside world sees one address: your router's public IP. The router keeps track of which reply goes to which device. It's the receptionist of your house, and she never double-books.

What your IP reveals about you

Three things, mainly: your rough location (usually your city or region, not your street), your internet provider, and whether you're on a VPN or proxy. That's meaningful, but it's not a tracking beacon with your name on it.

What it does NOT reveal: your name, your exact address, or your browsing history. Anyone claiming they can pull your home address from an IP alone is bluffing. Full story in Can Someone Find Me With My IP Address?

Why your IP keeps changing

Most home connections use dynamic IPs: your provider rotates your address every so often, like the salon shuffling the appointment book. Businesses often pay extra for a static IP that never changes. If your IP looks different this week than last week, that's normal and nothing is wrong.