IP Address & ASN (AS Number) Lookup ToolLook up ASN information from IP addresses.IP addresses (up to 10, one per line)SearchSafeThe results are not stored or published anywhere.ExplanationAn ASN (Autonomous System Number) is assigned by an RIR to identify an Autonomous System.From an IP address (IPv4/IPv6), this tool can look up:ASNThe ASN associated with the IP addressCountry (CC)The country code associated with the IP addressSearch details by IP addressRelated ToolsIP Address CheckCheck network information from your IP address.You can see IPv4/IPv6, ISP information, browser info, and more.NetworkIP AddressEnvironmentIP SearchLook up information from an IP address, hostname, or URL.Shows IP version, type, reverse DNS, country/region, ASN, and ISP info.NetworkDomainIP AddressDNS LookupFetch DNS records for a domain in one go.Supports A / AAAA / MX / NS / TXT / CNAME / SOA, and accepts URLs and Punycode (IDN) as input.NetworkDomainIP AddressWhoisGet Whois information for domains and IP addresses.Supports IDN (Punycode) and IPv4/IPv6.DomainIP AddressNetworkForward/Reverse DNSForward lookup (domain/hostname → IP address) and reverse lookup (IP address → domain/hostname).Supports IDN TLDs (Punycode) and IPv6, and also performs the reverse conversion on results so you can check both directions at once.NetworkDomainIP AddressPortCheck whether a specific port is open on an FQDN (domain) or IP address from the Internet.Supports URL input and Punycode (IDN) as well.NetworkDomainIP AddressSecurityIPv6 CheckCheck whether your current network environment supports IPv6.NetworkIP AddressEnvironmentIP Base ConverterConvert an IPv4 address to a 32-bit number and back.NetworkIP AddressTextIP TypeCheck whether an IP address is private, global, or a special-purpose address.NetworkIP AddressIP CalculatorCalculate subnet information from an IP address and subnet mask.NetworkIP AddressShort URLShorten a long URL into a short link.You can choose a custom ID, and the short link redirects directly without interstitial ads.MarketingNetworkURLISP CheckAutomatically detect your current Internet Service Provider (ISP).NetworkEnvironmentHTTP HeadersFetch HTTP headers from a URL. Supports following redirects as well.NetworkHTTPSite InfoRedirect TraceFollow HTTP redirects and inspect the redirect chain and final destination.NetworkHTTPURLSSL CertificateCheck a site's SSL/TLS certificate information.SecurityHTTPSite InfoNetworkVPN CheckCheck whether your current IP is detected as a VPN/proxy.SecurityNetworkEnvironmentSecurity HeadersCheck HTTP security headers and see recommended settings.SecurityHTTPSite InfoNetworkDomain AgeFetch a domain's registration date and calculate its age.DomainNetworkPrivate Relay CheckCheck whether iCloud Private Relay appears to be in use.SecurityNetworkEnvironmentDomain ExpirationFetch a domain's expiration date and related registration info.DomainNetworkNetworkIP Address