Public vs private IP addresses, without the jargon

The short answer

A public IP address identifies an internet connection to services outside the local network. A private IP address identifies a device only inside a local network such as a home, office, or school.

Open View My IP and you see the address used to reach this website. Open your device’s network settings and you usually see a private address assigned by the router. These values often differ, and that is normal.

What is a public IP address?

A public IP is globally routable: internet infrastructure can use it as a destination. Internet providers assign public addresses to customer connections, while hosting companies and cloud platforms assign them to servers and services. If you use a VPN, websites normally see the VPN server’s public address instead of the address assigned by your provider.

Several devices can appear online under the same public IPv4 address. A home router commonly shares one public IPv4 address across phones, computers, televisions, and game consoles. Mobile carriers and some fixed providers may share an address across multiple customers as well.

What is a private IP address?

A private IP works within a limited network and is not routed across the public internet. Your router typically assigns one to each device using DHCP. Addresses such as 192.168.1.12 and 10.0.0.8 are common examples.

Private addresses can be reused. Millions of unrelated homes may have a device at 192.168.1.2 because each address matters only inside its own network. That reuse helped IPv4 support far more devices than its public address space alone could accommodate.

How your router connects private and public addresses

For IPv4, a router commonly uses Network Address Translation, or NAT. When a private device starts an outbound connection, the router records it, replaces the private source details with its public details, and sends the traffic onward. Replies return to the router, which uses that record to deliver them to the correct device.

This is why a website usually cannot see your laptop’s 192.168.x.x address. The website communicates with the public side of the connection. Your router handles the last step to the private device.

The private IPv4 address ranges

Not every non-public address is private. For example, loopback addresses refer back to the same device, and link-local addresses support communication on a local link when other configuration is unavailable.

What these addresses reveal about privacy and security

A public IP is visible to services you contact because replies need somewhere to go. It can often be associated with a provider and an approximate region, but it does not normally reveal an exact street address by itself. Location databases can be stale or point to provider infrastructure.

Do not treat a private address as a secret password. Someone outside the network generally cannot route directly to it, but people and software already inside the network can use it. Secure each device, keep router firmware current, and expose services to the internet only when you understand the access controls involved.

Which IP address do you need?

• For a remote support agent, allowlist, or “what address does this site see?” Use your public IP.
• For a printer, media server, or another device on the same Wi-Fi network: Use its private IP.
• For router administration: Use the router or default gateway address on the local network.
• For hosting a service: You may need a public address, router configuration, firewall rules, and an alternative if your provider uses carrier-grade NAT.

When instructions simply say “find your IP,” identify where the connection is happening. The internet-facing answer is on this site; the local-network answer is in your device settings.