IP Tools

How to use it

1. Type an IPv4 address such as 192.168.1.10 — strictly four dot-separated numbers from 0 to 255.
2. The four representation cards update as you type: dotted decimal, unsigned 32-bit integer, hexadecimal and binary.
3. Below the cards, the address type is classified using a built-in range table.
4. The second panel is a static reference of common CIDR prefixes, masks and usable host counts.
5. Invalid input shows a clear error; the previous results stay untouched.

Common use cases

• Reading firewall logs — converting an integer like 3232235786 back into a readable address.
• Configuring access rules — confirming whether an address is RFC 1918 private, loopback or public.
• Learning networking — seeing the same address in binary to understand masks and prefixes.
• Checking documentation — using the prefix table to look up /22, /26 masks and host counts.

Why it stays private

All conversions are bit operations in your browser; nothing is looked up online and no address is stored.

FAQ

Q: Does it accept IPv6? A: No — this tool is IPv4 only. IPv6 has different notation and ranges that would not fit the four cards.

Q: Why is 192.0.2.1 not called public? A: The built-in table classifies the major ranges from RFC 791, RFC 1918, RFC 6598 and multicast. Some small special-purpose blocks (such as TEST-NET documentation ranges) are not separately labelled, so a few unusual addresses may show as public.

Q: Are zero-padded octets like 010.1.1.1 accepted? A: No. Zero-padded forms are ambiguous across systems (some treat them as octal), so they are rejected with an error message.