Network Utilities

DNS lookups and website checks. These tools contact external services.

DNS LookupLook up A, AAAA, CNAME, MX, NS, TXT, SOA, SRV, CAA and PTR records for any domain using DNS over HTTPS.MX Record LookupFind the mail servers (MX records) for a domain, sorted by priority, to check email delivery setup.TXT Record LookupRead the TXT records of a domain, such as SPF, DKIM, DMARC and domain verification tokens.Reverse DNS LookupFind the host name behind an IPv4 or IPv6 address with a PTR lookup via its in-addr.arpa or ip6.arpa name.What Is My IP AddressShow the public IP address your requests come from, as seen by the ipify service.HTTP Headers CheckerFetch a URL from our server and list its response status, redirect chain and HTTP response headers.Website Status CheckerCheck whether a website is up or down from our server, with its HTTP status and response time.SSL Certificate CheckerInspect a site's TLS certificate: issuer, validity dates, days until expiry and subject alternative names.URL UnshortenerReveal where a shortened link really goes by following its redirects on our server, without visiting it yourself.MAC Address FormatterNormalise MAC addresses to colon, hyphen, Cisco dot or plain notation in upper or lower case, one per line.