Resolve Host
For a hostname you get IPv4 and IPv6 addresses with reverse DNS names. For an IP address you get the PTR record and a check whether it points back to the same address.
Frequently asked questions
- What is forward-confirmed reverse DNS?
- The PTR record of an IP address gives a hostname, and that hostname points back to the same IP address. Mail servers without it often end up in spam.
Recent checks
Other tools
- WHOIS Who the domain registrar is and when it expires, who owns an IP range or ASN.
- Is it down? Check whether a website is up or down.
- DNS Lookup Check the DNS configuration of a domain.
- DNS Propagation Check whether a new DNS value has reached public resolvers.
- SSL Check Check whether a certificate is valid and when it expires.
- Ping Check whether a server responds and how fast.
- Blacklist Check Check whether an IP address, mail server or domain is blacklisted.
- Speedtest Measure the download, upload and ping of your internet connection.
- Domain monitoring Monitor a domain and get an email when it becomes available or its DNS or WHOIS data changes.