All tools: 41 free checks for IPs, domains, DNS and security
Everything on IPWhois.net in one place. Each tool runs on our own servers and data, needs no sign-up and works the same on a phone.
WHOIS lookup 5
Who owns an address, a domain, a network or a device.
IP Lookup
Full geolocation, ISP, ASN and WHOIS details for any IPv4 or IPv6 address
/ip-lookup
Domain Lookup
WHOIS registration, registrar, nameservers and expiry for any domain
/domain-lookup
Punycode Converter
Convert IDN domains between Unicode and xn-- form, spot homograph spoofs
/punycode-converter
ASN Lookup
AS name, organization, CIDR prefixes and BGP data for any ASN
/asn-lookup
MAC Address Lookup
Identify the manufacturer and vendor OUI from any MAC address
/mac-address-lookup
IP tools 14
Your own connection, conversions and calculators for addresses and ranges.
What Is My IP?
Instantly see your public IP address, location and ISP
/what-is-my-ip-address
My Location
Detect your device location via IP and browser geolocation
/my-location
Reverse IP Lookup
Discover all domains hosted on a given IP address
/reverse-ip-lookup
Hostname to IP
Resolve any hostname or domain to IPv4 and IPv6 addresses
/hostname-to-ip-address-lookup
Subnet Calculator
Compute network address, broadcast, host range for IPv4/IPv6
/ip-subnet-calculator
Binary Calculator
Convert IP addresses to binary, decimal and hex notation
/ip-binary-calculator
Random IP Generator
Generate random IPv4 or IPv6 addresses by CIDR range
/random-ipv4
IPv6 Compress / Expand
Convert IPv6 addresses between short RFC 5952 and full notation
/ipv6-compress
Extract IP Addresses
Pull every IPv4 and IPv6 address out of logs, headers or any text
/extract-ip-addresses
IPv4 to IPv6 Converter
Get the mapped, 6to4 and NAT64 IPv6 forms of any IPv4 address
/ipv4-to-ipv6
CIDR to IP Range
Expand CIDR blocks to ranges or split any range into CIDR blocks
/cidr-to-ip-range
IP Leak Test
Check whether your VPN or proxy is leaking your real IP address
/ip-leak-test
Traceroute Online
Trace the network path to any host with hop-by-hop latency
/traceroute-online
Ping Online
Test reachability and response time of any host or IP address
/ping
DNS tools 6
Records, nameservers and propagation, checked live.
DNS Lookup
Query A, AAAA, MX, NS, TXT, SOA, CNAME and other DNS record types
/dns-lookup
DNS Propagation Map
Check DNS propagation across 35 global resolvers with a live map
/dns-checker-map
Nameserver Checker
Inspect authoritative nameservers, IPs and TTLs for any domain
/nameserver-checker
Open Resolver Test
Test whether an IP is running an open DNS resolver vulnerable to abuse
/open-dns-resolver-test
DNS Leak Test
Check if your DNS queries are leaking outside your VPN tunnel
/dns-leak-test
Reverse DNS Lookup
Get the PTR record of any IP and verify FCrDNS forward confirmation
/reverse-dns-lookup
Security tools 14
Blacklists, certificates, headers, ports and email authentication.
Blacklist Checker
Test any IP against 40+ active DNSBL and spam reputation lists
/ip-blacklist-checker
SSL Checker
Verify SSL certificate validity, chain, expiry and configuration
/ssl-checker
HTTP Headers Checker
Inspect all HTTP response headers for any URL or domain
/http-headers-checker
Redirect Checker
Trace redirect chains hop by hop with status codes and timings
/redirect-checker
Port Checker
Test whether a specific TCP/UDP port is open on any host
/port-checker
Email Security (SPF/DKIM/DMARC)
Validate SPF, DKIM and DMARC records for any domain
/email-security-checker
DMARC Record Validator
Check DMARC syntax tag by tag before publishing, or fetch a live record
/dmarc-validator
SPF Record Validator
Validate SPF syntax and count DNS lookups against the 10-lookup limit
/spf-validator
Website Security Scanner
Scan any website for common vulnerabilities and misconfigurations
/website-security-scanner
Email Header Analyzer
Parse and visualize raw email headers to trace message routing
/email-header-analyzer
Subdomain Finder
Enumerate subdomains for any domain using DNS and certificate data
/subdomain-finder
Is It Down?
Check whether a website is down for everyone or just for you
/is-it-down
Router IP Finder
Detect your router default gateway and local IP via WebRTC
/router-ip-finder
User Agent Parser
Decode browser, OS and rendering engine from any user agent string
/what-is-my-user-agent
Webmaster tools 2
Sitemaps and getting new pages in front of search engines.
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