Categories · 17 tools

Network Tools

Look up DNS records, domains, IP addresses and website status. Lookups run through our server; see each tool’s badge.

DNS & domains

Look up A, AAAA, MX, NS, TXT, CNAME, SOA and CAA records for any domain.

Compare how two major public resolvers answer for a DNS record.

Look up the mail (MX) servers for a domain and their priorities.

Resolve a hostname to its IPv4 and IPv6 addresses.

Look up the hostname for an IPv4 address with reverse DNS (PTR).

Identify and retrieve detailed information about Autonomous System Numbers (ASN), including organization names, countries, and assigned IP ranges.

Find known subdomains of a domain using a public host-search database.

IPv4 subnet calculator: network, broadcast, masks and host range from CIDR.

Check whether an IPv4 address is listed on major spam and abuse DNS blacklists.

Check whether an email domain is on spam blacklists and has mail servers.

Find your public IP address.

Look up the location, network and time zone of an IP address, or your own.

Check which IP addresses your browser exposes through WebRTC.

Parse a User-Agent string into browser, operating system and device type.

Check whether a website is up and how fast it responds.

Detect common technologies a website reveals in its headers and HTML.

See which HTTP methods a server allows: probes GET, HEAD, OPTIONS and TRACE and reads the Allow header for the rest.