uencoder

IP Address Info

Analyze IPv4/IPv6 addresses and CIDR subnets: class, private/multicast flags, binary/hex, reverse DNS, network/broadcast/hosts. Free, private, and 100% client-side.

Local only

Recent history

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How to use

  1. Enter an IP address or CIDR notation (e.g. 192.168.1.1 or 10.0.0.0/24).
  2. View the address analysis or subnet calculation results.
  3. Copy or download the result as needed.

Frequently asked questions

What input formats are supported?
IPv4 addresses (e.g. 192.168.1.1), IPv6 addresses (e.g. 2001:db8::1), and CIDR notation (e.g. 10.0.0.0/24) are all supported.
What subnet information is calculated?
For CIDR input, the tool computes network address, broadcast address, subnet mask, first/last host, and usable host count.
Does this tool send my IP to a server?
No. All parsing and calculation is done entirely in your browser. No data leaves your device.

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