20 Free IP and Network Tools

Show your public IP information and browser network details.

Validate an IPv4 address and show useful decimal, binary, and private range details.

Validate an IPv6 address and identify common IPv6 address patterns.

Prepare DNS record checks for a domain and common record types.

Convert an IP address into the reverse DNS lookup name format.

Prepare a domain Whois query and extract the domain name from a URL.

Estimate ping command syntax and explain what ping results mean.

Generate traceroute commands and explain route hop checks.

Check whether a port number is valid and identify common service ports.

Parse pasted HTTP response headers and highlight common security and cache headers.

Prepare SSL checks and review common certificate fields to inspect.

Parse a browser user agent string into browser, operating system, and device clues.

Calculate usable IPv4 range details from a start and end IP address.

Calculate IPv4 CIDR network address, broadcast address, and usable host range.

Calculate subnet mask, wildcard mask, and host capacity from prefix length.

Prepare IP geolocation checks and explain what Geo IP data can and cannot confirm.

Prepare MX record checks for email routing and domain setup review.

Prepare NS record checks to review authoritative nameservers for a domain.

Prepare TXT record checks for SPF, DKIM, DMARC, and verification records.

Prepare IP or domain blacklist checks and explain common DNSBL result meanings.