DNS Lookup
Query DNS records with any resolver and run WHOIS lookups.
After a DNS change you want to know what a resolver actually returns, not what a dashboard says. The DNS Lookup tool queries the record types you pick, using your system resolver or a nameserver you specify, and shows values with TTLs. It also runs WHOIS lookups. Queries run from your own machine, which is why the answers match what your network sees.
Ten record types plus ALL
Query A, AAAA, CNAME, MX, TXT, NS, SOA, PTR, SRV or CAA. The ALL option queries A, AAAA, CNAME, MX, TXT, NS, SOA and CAA in one go.
Choose the resolver
Use the system default, or enter a nameserver IP. Quick-select buttons fill in Google, Cloudflare, Quad9 and OpenDNS.
Values, TTLs and timing
Each record shows its type, name, value, TTL and MX priority where relevant, along with the query time and the nameservers that were used.
Reverse lookups
Enter an IP address, or pick PTR, to run a reverse lookup.
WHOIS lookup
Get the registrar, creation and expiry dates, nameservers, status and contacts when the registry provides them, plus the raw WHOIS text.
Which DNS server does the lookup use?
By default it uses the resolver configured on your system. If you enter a nameserver IP address, queries are sent to that server on port 53 instead.
Why did WHOIS return little data?
WHOIS output differs between registries, and the tool reads the common fields such as registrar, dates and nameservers. Some registries redact contacts or use other labels. The raw response is shown so you can read it yourself.
Calculate IPv4 subnets from CIDR, split networks and plan VLSM.
Open →Parse PEM certificates and inspect the TLS certificate chain of a host.
Open →Fetch a URL and grade its HTTP security headers with fix suggestions.
Open →No card, no account. Every tool included, bought once.