IP Address Converter

What is IP Address Converter?

The same IPv4 address looks different across systems: nginx logs may show a decimal integer, firewall rules use dotted quad, and protocol debugging needs binary. This tool accepts dotted, decimal, or 0x-hex input and produces every form at once, including the IPv4-mapped IPv6 spelling (::ffff:x.x.x.x), with public/private scope flagged. Below, any address range (e.g. 192.168.1.10 - 192.168.1.200) can be aggregated into the shortest possible CIDR list — ready to paste into ACLs and allowlists. All computation is local.

How to Use

1. Enter a dotted IP, decimal integer, or 0x hex value to see every form
2. To aggregate a range, fill in the start and end IP below

FAQ

Why does pinging a plain number sometimes work?

Many systems parse an IP as a 32-bit integer — ping 2130706433 is equivalent to ping 127.0.0.1, and decimal form is often used to bypass naive IP filters.

Is range-to-CIDR aggregation exact?

Yes — the output CIDR list covers exactly the input range, no more and no less. Unaligned ranges are split into multiple CIDRs (e.g. .1-.6 becomes 4 entries).

What is IPv4-mapped IPv6?

The ::ffff:x.x.x.x form, used to represent IPv4 addresses inside an IPv6 stack — common in dual-stack server logs.

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