What is my public IP address?

Your public IP is the address exposed to the internet by your ISP or network gateway. Use the Public IP Lookup section to fetch it instantly.

CIDR stands for Classless Inter-Domain Routing. It represents an IP network and prefix length, such as 192.168.1.0/24.

How do I know if an IP is private or public?

Private ranges include IPv4 blocks like 10.0.0.0/8 and 192.168.0.0/16, plus IPv6 unique-local addresses (fc00::/7). Our checker identifies these automatically.

Lookup, Validate, and Calculate IP Data

A fast, privacy-friendly toolkit for IP address tasks. Everything runs in your browser. Public IP lookup uses a simple fetch API call.

Public IP Lookup

Fetch your current public IP address.

Click the button to load your public IP.

IPv4 / IPv6 Validator

Validate a single IP and detect its version.

Awaiting input.

CIDR Calculator (IPv4)

Get network, broadcast, and usable host range.

Awaiting CIDR input.

Subnet Mask Converter

Convert prefix length ↔ subnet mask (IPv4).

Enter a prefix or subnet mask.

Private / Public IP Checker

Classify IPv4 and IPv6 addresses including loopback, link-local, and private ranges.

Awaiting input.

Frequently Asked Questions

Is this tool free to use?

Yes. All tools on this page are free and run directly in your browser.

Do you store my IP address?

No server-side storage is used by these client-side calculators. Public IP lookup calls a third-party API to return your address in real time.

Why is CIDR calculator marked IPv4?

Broadcast and classic usable-host range are IPv4 concepts. IPv6 uses different subnetting behavior.

Can I use this on mobile?

Absolutely. The layout is fully responsive and optimized for phones and tablets.