IP address notation converter
The same IPv4 address can be written a dozen ways — as one number, in hex or binary, or inside an IPv6 address. Paste any of them to see all the others, and whether the form you have is ambiguous.
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Why normalising matters
127.0.0.1, 2130706433, 0x7f000001, 0177.0.0.1 and 127.1 can all reach the same machine. A filter that compares text will miss most of them, which is why security checks should convert an address to one canonical form first — as this site does before any lookup.
Why would an address be written as one number?
Databases and some logs store IPv4 addresses as 32-bit integers because they sort and compare quickly, and range checks become simple arithmetic.
What is ::ffff:192.168.1.10?
An IPv4-mapped IPv6 address: how a dual-stack server shows a client that connected over IPv4. Web server and application logs often contain them.
Is anything sent to a server?
No. The conversion runs in your browser.