Look up the DNS records for any domain (A, AAAA, CNAME, MX, TXT, NS, CAA and SOA) straight from public DNS. Use it to confirm a change has gone live or to debug email and website problems.
A and AAAA records point a name at an IPv4 or IPv6 address. CNAME records make one name an alias of another. MX records tell the world which servers receive email for the domain.
TXT records hold text used for verification and email security: SPF, DKIM and DMARC all live there. NS records name the servers that are authoritative for the domain, CAA records limit which certificate authorities may issue SSL certificates, and SOA holds the zone's administrative details.
Resolvers cache answers for the record's TTL (time to live), shown in seconds next to each value. If a record had a TTL of 3600, some visitors may see the old value for up to an hour after you change it.
If the lookup still shows the old value long after the TTL, check that you edited the zone at the provider listed in the NS records. Editing DNS at your registrar does nothing if the domain's nameservers point somewhere else.
Most email delivery problems come down to DNS. Look up MX to confirm mail goes to the right provider, then TXT to find your SPF record (it starts with v=spf1) and the _dmarc subdomain for DMARC.
There should be exactly one SPF record per domain. If you see two, receiving servers treat SPF as broken, so merge them into one.
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Queries go to Cloudflare's public resolver (1.1.1.1) over DNS-over-HTTPS, so you see what most of the internet sees rather than a cached answer on your own network.
Changes are visible as soon as cached copies expire, which depends on the TTL of the old record, commonly between five minutes and a day. Lowering the TTL before a planned change makes the switch faster.
DKIM keys live at selector._domainkey.yourdomain.com. Enter that full name with type TXT; your email provider tells you which selector it uses.
The DNS standard does not allow a CNAME on the root (apex) of a domain alongside other records. Use A/AAAA records there, or a provider feature such as ALIAS or CNAME flattening.
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