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Domains & DNS

Domains and DNS

DNS causes an outsized share of website emergencies, mostly because it is the one part of the stack with a built-in delay between making a change and seeing the result.

Domains & DNS

Domains, DNS, nameservers, SSL and email records.

What are nameservers?

Changing nameservers is not like changing a DNS record. It hands over the whole address book.

3 min read

What is DNS, and why does it break things?

DNS is the address book of the internet. Most "my website is down" emergencies are actually DNS.

4 min read

Go deeper

DNS lookup

See the records a domain is resolving to right now.

SSL checker

Issuer, expiry, and which hostnames a certificate covers.

Who hosts this site?

Nameservers, mail provider and hosting for any domain.

What are nameservers?

Why changing them moves every record at once.

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