IP Address Lookup: How to Find the Location, ISP & More

What is an IP address?

An IP address (Internet Protocol address) is the unique numerical identifier assigned to every device connected to the internet — or to a private network. It works like a postal address for your computer: when you visit a website, send an email, or stream a video, the data packets know where to go because of IP addresses.

There are two versions in use today:

• IPv4 — the classic format: four number groups separated by dots, e.g. 151.101.65.121. Still the most common.
• IPv6 — the newer, longer format designed to solve IPv4 address exhaustion: eight groups of hex digits, e.g. 2606:4700::6810:8078.

Every time your device connects to the internet, it is identified by a public IP address assigned by your ISP (Internet Service Provider).

What can an IP address lookup reveal?

An IP lookup queries public databases to return information tied to that address:

Crucially: an IP lookup shows the registered location of the IP block, not the exact physical position of the device. City-level accuracy is typical for fixed-line connections; mobile connections may resolve to a location hundreds of kilometres away.

How to find your own IP address

The fastest way: open the IP Lookup tool — your public IP is detected automatically when the page loads. You'll also see your ISP, approximate location, and ASN instantly.

On your own device:

• Windows: open Command Prompt and run ipconfig (the IPv4 address under your active adapter is your local IP — for the public IP, use a web tool).
• macOS: System Settings → Network → your connection.
• Linux: run ip addr or hostname -I.
• Phone: Settings → Wi-Fi → your network → IP address.

Remember the distinction: your device shows your local (private) IP like 192.168.1.10. The public IP — the one the rest of the internet sees — is on your router, and it's what any online IP lookup returns.

How to look up any IP address online

1. Open the IP Lookup tool.
2. Paste the IPv4 or IPv6 address you want to investigate into the input field.
3. You get the country, region, city, timezone, coordinates, ISP, and ASN.

The lookup runs through a server-side proxy so it works from any browser without CORS issues — and the site does not log or store the addresses you search.

When is an IP lookup useful?

• "What is my IP?" — checking your public IP, especially after restarting your router or changing networks.
• Verifying a VPN works — the location shown should match your VPN's exit server, not your real location. If it shows your home city, your VPN is leaking.
• Investigating suspicious traffic — check the geolocation and ASN of an IP hitting your site or sending phishing emails.
• Debugging network issues — confirm which ISP/ASN an address belongs to when diagnosing routing problems.
• Geo-targeting checks — verify what country a content-delivery or edge node appears to be in.

Why are IP lookup results sometimes wrong?

IP geolocation is not GPS. Databases infer location from registries, routing data, and user reports — so results can be wrong when:

• The IP belongs to a cloud provider or CDN (e.g. AWS, Cloudflare) — the registered address is a datacenter, not a user.
• Your ISP uses CGNAT or regional aggregation — thousands of users share one public IP.
• The database hasn't updated after a block transfer between organizations.

If a lookup looks suspicious, cross-check with the ASN and ISP fields: a "wrong city" on a mobile network is normal; a mismatch between the claimed ISP and the registered ASN is more meaningful.

Keep your own IP private

If you care about what a reverse lookup shows about you:

• Use a VPN — your traffic exits from the VPN provider's IP instead of yours.
• Avoid leaking — don't paste raw IPs into chat tools, forums, or "ip logger" services.
• Understand your ISP — every website you visit sees your public IP by default; that's how the internet routes data back to you.

For deeper network checks, combine the IP lookup with the DNS Lookup and SSL Checker tools to audit a domain end to end.