“What Is My IP?” — A Clear, Practical Guide

If you’ve ever typed “what is my IP” into a search bar, you were probably trying to identify the address the internet uses to talk to your device. This article demystifies IP addresses, explains the difference between public and private IPs, shows quick ways to find yours on any platform, and covers privacy, accuracy, and common pitfalls.

The 10-second answer

Your public IP is the address the internet sees (usually assigned by your ISP or mobile carrier).
Your private IP is the address inside your home/office network (e.g., 192.168.1.23) used to talk to your router and local devices.
You can have both IPv4 (classic) and IPv6 (newer, longer) addresses at the same time.

IP basics (IPv4 vs. IPv6)

Feature	IPv4	IPv6
Format	`203.0.113.7`	`2a00:1450:4009:80b::200e`
Length	32 bits (~4.3B addresses)	128 bits (virtually inexhaustible)
Status	Still everywhere, scarce	Growing rapidly
Notes	Often shared via NAT	Often globally unique per device

Modern networks are “dual stack,” meaning you might use IPv6 when available and fall back to IPv4 elsewhere.

Public vs. private: why there are two

Most homes and offices use NAT (Network Address Translation). Your router holds the public IP and hands out private IPs (like 192.168.x.x or 10.x.x.x) to devices inside your network. To websites, all your devices appear to come from the same public IP (the router’s).

Some mobile and broadband providers use CGNAT (Carrier-Grade NAT). In that case, many customers share one public IPv4, which can complicate hosting game servers or opening ports.

How websites “see” your IP

When your browser connects to a site, the server sees the source IP of the connection. If you’re using a VPN, proxy, Tor, or work gateway, the site will see that intermediary’s IP instead of yours.

How to check your public IP

Quickest (no install)

Search the web for what is my IP. The first result usually shows it.
Your router’s status page often displays the WAN/public IP on its home or Internet/Status screen.

Command-line options (copy/paste)

These call simple public endpoints. Results depend on your current network path (VPN, proxy, cellular, etc.).

Windows PowerShell

(Invoke-RestMethod "https://api.ipify.org?format=json").ip
(Invoke-RestMethod "https://api64.ipify.org?format=json").ip   # Prefer IPv6 if available

macOS / Linux

curl -s https://ifconfig.me
curl -s https://api.ipify.org
curl -s https://api64.ipify.org?format=text   # IPv6

DNS-only methods (no HTTPS tools needed)

# IPv4 via OpenDNS
nslookup myip.opendns.com resolver1.opendns.com

# IPv4/IPv6 via Google Public DNS (Linux/macOS)
dig -4 TXT +short o-o.myaddr.l.google.com @dns.google
dig -6 TXT +short o-o.myaddr.l.google.com @dns.google

How to check your private (local) IP

Windows

ipconfig

Look under your active adapter for “IPv4 Address”.

macOS

ipconfig getifaddr en0   # Wi-Fi on most Macs; try en1 if needed
# or
ifconfig | grep "inet "  # Lists IPv4s for all interfaces

Linux

ip addr show     # Look for 'inet' under your active interface

iPhone/iPad (iOS/iPadOS)
Settings → Wi-Fi → tap the ⓘ next to your network → IP Address.

Android
Settings → Network & internet → Internet/Wi-Fi → your network → Advanced → IP address.

Why your IP may change (or not)

Dynamic IP (default): ISPs typically use DHCP leases. Your public IPv4/IPv6 can change after a modem reboot, lease expiry, or network changes.
Static IP: Some plans offer a fixed IP (often a paid add-on), useful for hosting or stable allowlists.
Mobile data: Carriers frequently rotate public IPv4 via CGNAT; IPv6 is often more consistent but still not guaranteed.

What your IP reveals (and what it doesn’t)

Approximate location: IP-to-location databases estimate city/region based on ISP info. This can be wrong or imprecise (sometimes off by hundreds of kilometers).
ISP/carrier and network type: Lookups can show which organization owns the address and whether it’s mobile, broadband, or cloud.
Identity: Your IP does not directly reveal your name or home address. However, combined with account activity, cookies, or legal requests to ISPs, it can be correlated to you.

Privacy tips

Use a reputable VPN to mask your public IP from sites you visit. Understand that the VPN provider becomes your new “view of the internet.”
Enable HTTPS-only mode in your browser to encrypt traffic contents (your IP is still visible to the destination).
Prefer IPv6 privacy extensions (enabled by default on most systems) which rotate your IPv6 identifiers over time.
Beware IP-based allowlists: convenient but brittle—your IP may change; use keys, SSO, or zero-trust tunnels instead.

Hosting, ports, and CGNAT gotchas

If you’re running a game server, self-hosting a website, or exposing a smart-home service:

Behind CGNAT: Inbound connections to you will fail because you don’t control the ISP’s NAT. Ask your ISP for a public/static IP, or use a reverse tunnel (e.g., Cloudflare Tunnel) or overlay network (e.g., Tailscale/ZeroTier).
Home NAT: You’ll need port forwarding on your router, a stable private IP for the host device (DHCP reservation), and possibly a dynamic DNS name so others can reach you when your ISP IP changes.
IPv6: You might not need port forwarding if your device has a global IPv6 address, but you’ll need to adjust firewall rules carefully.

Troubleshooting checklist

Different results on different sites? You may be dual-stacked (IPv4 and IPv6) or behind a VPN/proxy. Turn the VPN off/on and retest.
“Server unreachable” from the internet? Check CGNAT, port forwarding, local firewall, and whether your service is listening on the right interface.
Corporate network weirdness? Many orgs egress through centralized gateways; the public IP may not match your office’s physical location.
Geolocation is wrong? Wait for databases to update, or contact the IP registry/ISP; consider using a domain name instead of relying on location.

Frequently asked questions

Is my IP personally identifiable information?
By itself, an IP is usually considered pseudonymous data. It can still be sensitive because it helps correlate activity.

Can two people share the same public IP?
Yes—via NAT or CGNAT, thousands of users can appear as one IPv4.

Can someone hack me if they know my IP?
An IP alone isn’t a magic key, but it can be a target. Keep your router and OS updated, disable unnecessary port forwards, and use strong passwords.

Why do I sometimes see multiple IPs?
You might have both IPv4 and IPv6, or multiple interfaces (Wi-Fi, Ethernet, VPN). Each interface can have its own local IP; your egress path determines your public IP.

Key takeaways

Public IP = internet-facing; private IP = inside your network.
You can discover your public IP via a quick web check or CLI; your private IP via system tools.
Expect change unless you’ve arranged a static IP.
For privacy and hosting reliability, use the right tools: VPNs, dynamic DNS, tunnels, or static IPs.