See what is my IP address in one click: your public IPv4 or IPv6, approximate location, ISP and ASN, plus a map. Free, no sign-in.…

Domain to IP lookup that turns any domain or URL into its IP address, country, ISP and reverse DNS. Check many at once and export …

Run a free reverse IP lookup to see which domains share a server. Enter a domain or IP, get a numbered list, copy it or download C…

Use this free Class C IP checker to scan domains in bulk, see each IP and Class C range, and spot shared hosting blocks. Check you…

Run a free DNS lookup online to see A, AAAA, MX, NS, TXT, CNAME, SOA and CAA records for any domain, grouped by type in tables. Ch…

What is my browser? See your browser name, version, OS, device type, screen size and user agent at a glance. Free, no sign-in. Che…

Browse a free proxy list of HTTP proxies with IP, port, country, anonymity level and HTTPS support. Search, filter and export to a…

Run a free network speed test online to measure download, upload, ping and jitter, then see what your connection can handle. Start…

Run a bulk IP lookup for up to 20 addresses at once. See city, region, country, ISP and coordinates for each IP, then export a CSV…

Use this free open port checker to test if TCP ports like 80, 443, 22 or custom ports are reachable on a public host. See status a…

Use this subnet CIDR calculator to get the network, broadcast, subnet mask, wildcard mask and usable host range from any IPv4 addr…

Use this free DNS propagation checker to compare Cloudflare and Google resolver answers for A, AAAA, CNAME, MX, NS, TXT and SOA re…

Run a free MX record lookup to see mail server priorities, IP addresses and TTL for any domain, plus the email provider. Check you…

Use this traceroute tool page to test whether a public host accepts a TCP connection on port 443, with IP, hostname and connection…

Run a free A record lookup to see any domain's IPv4 addresses, reverse DNS hostnames and TTL values in seconds. No sign-in ne…

Run a free AAAA record lookup to see every IPv6 address and TTL for any domain. Verify dual-stack setup after a DNS change. Check …

Run a free CNAME record lookup for any subdomain. See the host, target and TTL, plus the full resolution chain to the final IP. Ch…

Run a free TXT record lookup to see SPF, DKIM, DMARC and verification records, each with its TTL, for any domain. Enter a domain a…

Run a free NS record lookup to see a domain's authoritative nameservers, their IP addresses, DNS provider and TTL in one tabl…

Run a free ASN lookup by IP address, domain, or AS number. See the AS name, holder, hostname, and location in one click. Find any …

Use this free subdomain finder to list subdomains of any domain with IP address and status from certificate logs and DNS checks. S…

Use this free IPv6 subnet calculator to get the network address, first and last address, host bits and total addresses from any pr…

Use this free MAC address vendor lookup to find a device's manufacturer from its OUI. Accepts colon, dash or plain hex format…

Use this free CIDR to IP range converter to get the network, first and last IP, broadcast, subnet mask and host count for many blo…

What is my user agent? See your browser, version, OS, device type and bot status instantly, or paste any string to parse it. Try i…

Run a free VPN leak test to compare your public IP and WebRTC addresses with your VPN and ISP IPs. DNS leaks are not tested. Check…

Use this free DNSSEC validator to check DNSKEY, DS and RRSIG records and the AD flag for any domain. No sign-in needed. Test your …

Use this free VPN checker to see if an IP is a VPN, proxy, Tor exit or data center. Check one address, a list of 50, or your own c…