How do I set up reverse DNS (PTR) for my IP addresses?

You request reverse DNS (a PTR record) for your IP addresses from support. Open a ticket with the IP address and the hostname you want.

What do you need it for?

A PTR record links an IP address to a hostname. The reverse of an A or AAAA record, in other words. Mail servers in particular look at it: a mail server without matching reverse DNS ends up in spam more easily.

What you need

• The IP address, IPv4 or IPv6.
• The hostname, for example mail.yourdomain.com.

Request

1. Open a ticket.
2. List the desired hostname for each IP address, for example:
   • 203.0.113.10 becomes mail.yourdomain.com
3. Support sets up the PTR record and lets you know.

Check

Look up the PTR record with:

• Linux or macOS: dig -x <ip-address> +short
• Windows: nslookup <ip-address>

You then see the hostname that belongs to the address. Still seeing the old name? Wait a while: resolvers can remember the old answer for some time.

See also How do I request extra IPv4 or IPv6 addresses?