adding www to dns

Question

Our domain resolves with domain.co.uk
but we'd like to make sure www.domain.co.uk also points to the same site. If we add that as an A record should be add it with the ip addresses that are there, or do we need to add it as a resource alias?

Side question, using dns propogation checkers we're noticing some intermittent issues with the domain (we have the servers entered that they told us , all 4) is that normal?

Accepted Answer

Hello.

If you want to point a subdomain to an A record domain, I think it's a good idea to register it with a CNAME record.  
For example, in the future, when the IP address changes due to server migration, simply changing the IP address of the A record will change the direction of the CNAME record, which I think will be convenient.

> Side question, using dns propogation checkers we're noticing some intermittent issues with the domain (we have the servers entered that they told us , all 4) is that normal?

It may be that the domain propagation is taking a long time or that the name resolution is not working properly.  
If the problem is not resolved even after a few days, it may be a good idea to review your DNS settings.

Answer

Thanks I'll set it up as a cname, so www.domain.co.uk and route traffic to domain.co.uk , correct?

The domain has been up for hmm... at least 10 days. but I am noticing random resolution problems on sites like whatsmydns which is showing 2-3 locations not resolving now, dnschecker seems fine. but a couple hours ago whatsmydns was showing it failed in all locations. mxtoolbox seems to indicate that it's all good.

adding www to dns

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