A domain’s DNS records are the instructions telling the internet where to send email, which server hosts a website, and which services are authorized to act on a domain’s behalf. Most site owners never look at these records directly until something breaks. This guide explains ten specific record types in plain terms, drawing on the free utilities in WritoryBuzz’s tools directory, and shows how to check any domain’s actual current records in seconds.
The A Record: Pointing a Domain to an IP Address
An A record maps a domain name to a specific IPv4 address, the actual numeric address of the server hosting a website, functioning as the most fundamental record type since without it a domain name has no way to resolve to an actual server at all.
The MX Record: Directing Email Delivery
MX, mail exchange, records tell other mail servers where to deliver email sent to a given domain, and a domain missing or misconfigured MX records will simply fail to receive email entirely, regardless of how correctly everything else on the domain is configured.
The TXT Record: Flexible Verification and Policy Data
TXT records hold arbitrary text data used for a range of purposes, domain ownership verification, email authentication policies like SPF, and various third-party service verification requirements, making this one of the more flexible and commonly used record types on any modern domain.
The CNAME Record: Aliasing One Domain to Another
A CNAME record points one domain or subdomain to another domain name rather than directly to an IP address, commonly used for subdomains like a blog or a support portal that actually resolves through a separate underlying service.
| Record Type | Primary Purpose | What Breaks Without It |
| A | Points a domain to an IPv4 address | Website becomes unreachable |
| MX | Directs email delivery | Email delivery fails entirely |
| TXT | Verification and policy data | Domain verification and email authentication fail |
| CNAME | Aliases one domain to another | Subdomain services stop resolving |
Six More Record Types Worth Knowing
A records function like A records but for IPv6 addresses. NS records specify which name servers are authoritative for a domain. SPF records, technically a specific TXT record format, authorize which mail servers can send email on a domain’s behalf. DKIM records add a cryptographic signature verifying email authenticity. DMARC records specify how receiving mail servers should handle messages failing SPF or DKIM checks. SOA records hold administrative information about a domain’s DNS zone itself.
Checking Any Domain’s Actual Current Records
Rather than guessing at what records a domain currently has configured, running the domain through a free dns lookup returns every current record type instantly, showing exactly what is actually live rather than what a configuration panel might suggest is set up correctly.
Pairing this with an ip lookup confirms exactly which physical server or hosting provider a domain’s A record actually points to, useful context when troubleshooting a site that appears to be pointing somewhere unexpected.
Where DNS and Site Performance Intersect
DNS resolution time itself contributes to overall page load speed, since a browser must resolve a domain to an IP address before it can even begin loading a page, meaning checking a domain’s records with a free dns lookup alongside a page speed checker together provide a genuinely complete picture of what is affecting a site’s actual load performance.
Explore WritoryBuzz’s full free technical SEO toolkit for every utility referenced throughout this guide.
