Enter a domain and check its A, AAAA, MX, TXT, CNAME, NS and SRV records in real time.
Works for any publicly reachable domain worldwide.
Here you'll find answers to the most common questions about our free DNS lookup tool.
A DNS lookup queries the publicly available DNS records of a domain and shows which servers or targets they point to. This is useful for checking a domain's configuration, verifying DNS changes, or narrowing down the cause of email or connectivity issues.
A records point to an IPv4 address, AAAA records to an IPv6 address. MX records specify which mail server is responsible for a domain. TXT records hold freely definable text information, for example for SPF or domain verification. CNAME records forward one name to another, NS records name the responsible name servers, and SRV records point to specific services including a port.
The TTL specifies, in seconds, how long a DNS record may be cached by other servers before it's queried again. A low TTL means changes become visible worldwide faster, but also causes more DNS queries.
DNS changes take time to propagate worldwide, since many servers and internet providers keep serving the old values until the TTL expires. Depending on the original TTL, this can take anywhere from a few minutes to 24-48 hours.
NXDOMAIN means that no DNS records at all exist for the queried domain – it's either not registered, hasn't been activated yet, or was misspelled. In this case, check the spelling or whether the domain is actually registered.
SPF and DKIM entries are stored as TXT records and help email providers verify that an email was actually sent by an authorized server of the stated domain. If these records are missing or incorrect, emails are more likely to end up in the spam folder.
Yes, the tool works for any publicly reachable domain, regardless of hosting provider – including domains registered or hosted with Speed-Net. This makes it easy to check whether changes made in the customer portal are already active.
Yes, it's completely free to use, requires no registration, and can be used as often as you need.