What each DNS record does
A / AAAA point the name to an IPv4 / IPv6 address. CNAME makes a name an alias of another. MX lists the mail servers that accept email for the domain. NS names the authoritative nameservers. TXT holds verification strings and email security policies such as SPF and DMARC. CAA limits which certificate authorities may issue SSL certificates. SOA carries the zone serial number and timing values.
Results come from our resolver and respect each record’s TTL, so a recent change may take a while to appear everywhere.
Frequently asked questions
Why do I see old DNS records after making a change?
Resolvers cache answers for the record’s TTL. Until that time passes, some users and tools still get the previous value. Lower the TTL a day before planned changes to make them visible faster.
How do I check if SPF and DMARC are set up?
Look for a TXT record on the domain starting with v=spf1 for SPF. DMARC lives on the _dmarc subdomain: enter _dmarc.yourdomain.com and look for a TXT record starting with v=DMARC1.
What is the difference between NS records here and at my registrar?
The registrar sets the delegation in the parent zone (for example .com). The NS records shown here come from the zone itself. They should match; a mismatch is a common cause of intermittent resolution problems.
Can TLDix warn me when my nameservers change?
Yes. Tracked domains are re-checked regularly, and nameserver changes appear in the domain history so you can spot unexpected or unauthorised changes.