Frequently Asked Questions

Do I have to have www. in my URL?
In short, yes. Due to how DNS works and how the foo//bar service is hosted.

The long answer is because the foo//bar service makes use of CNAMEs for load-balancing and due to the volatility of IP addresses in cloud deployments.

A CNAME must be specified as a host record (e.g. the www host in the domain:, an apex record must be an A record (an IP address). The IP addresses of foo//bar servers are volatile and can change without notice.

It doesn’t have to be .www, but does have to be a host record; e.g.,, are all hosts, is not).