What Is an IP Address?

An IP address (Internet Protocol address) is the number that identifies a device on a network so that data knows where to go. Every request you send — loading a page, sending an email, streaming video — is split into packets stamped with a source and a destination IP, the way an envelope carries a return address and a delivery address.

There are two kinds that matter here. A private IP (like 192.168.1.24) is handed out by your router and only means something inside your home or office network. A public IP is the single address your internet provider assigns to your connection, and it is the one the rest of the internet actually sees. Your router performs NAT (network address translation), mapping every phone, laptop and TV behind it to that one public address.

So when you visit a website, the site does not see your laptop's private IP. It sees the public IP of your connection, plus whatever your browser and headers reveal on top. That public IP is assigned by your ISP and can change over time (dynamic) or stay fixed (static).

If you want to see your own public address right now, use our what-is-my-IP tool. Everything a website logs about your location starts from that number, which is exactly why replacing it with a VPN or proxy exit IP changes what others can see.

IPv4 is the classic four-number style; the world has run out of fresh ones, so providers share and reuse them heavily. IPv6 is the newer, vastly larger format built to give every device its own address.

Most connections today can use either, and a site may log whichever your device presents. A privacy note: because IPv6 hands out so many unique addresses, it can make a single device easier to single out — good VPN and proxy setups account for both.

Your public IP is not your name or street address, but it is not anonymous either. From it, a website or service can usually infer:

• Rough location — often the right country, region or city, though it can be off by a wide margin, especially on mobile networks.
• Your ISP or hosting provider — the network that owns the address block.
• Connection type — residential, business, mobile or datacenter.

What it does not directly reveal is your identity, your precise GPS location, or what you do inside an encrypted connection. Linking an IP to a real person generally requires records held by the ISP. Still, sites routinely use your IP for geo-blocking, rate limits, ad targeting and fraud scoring — so hiding your origin IP is the most direct way to reduce what strangers can tie back to your connection.

Both tools work by sending your traffic through an intermediary, so the destination site sees the intermediary's exit IP instead of your origin IP.

• A WireGuard or OpenVPN tunnel encrypts all traffic from your device and routes every app through the VPN exit. Best for whole-device privacy on Windows, macOS, Linux, Android, iOS and routers.
• An authenticated SOCKS5 or HTTP proxy reroutes a specific app or script. Our paid proxies are datacenter IPs — fast and metered, ideal for scraping, automation and testing.

Want a fixed exit that is yours alone? A dedicated personal IP can be bound to either the VPN or proxy, associated with your s4m account. Prefer to experiment first? Browse the community free proxy list — third-party servers, validated continuously, use at your own risk. For step-by-step setup see our guides, and the VPN vs proxy comparison to pick the right tool.