Question

DNS Propagation of sub-domains

Posted July 3, 2014 3.5k views

Hi all,
I created a DNS record for a client domain mydomain.com earlier (about 4 hours ago). The base domain is now public, but all of the sub-domains remain unpingable and unreachable in a browser. OK, it’s early days, but I’m curious as to why the base domain has propagated but the sub-domains haven’t. Here’s my zone file:

$TTL    1800
@       IN  SOA NS1.DIGITALOCEAN.COM.   hostmaster.mydomain.com. (
            1404417443 ; last update: 2014-07-03 19:57:23 UTC
            3600 ; refresh
            900 ; retry
            1209600 ; expire
            1800 ; ttl
            )
             IN      NS      NS1.DIGITALOCEAN.COM.
                     NS      NS2.DIGITALOCEAN.COM.
                     NS      NS3.DIGITALOCEAN.COM.
@   IN A    xxx.xxx.xxx.xxx
mail.mydomain.com   IN A    xxx.xxx.xxx.xxx
webmail.mydomain.com    IN  A   xxx.xxx.xxx.xxx
www.mydomain.com    IN A    xxx.xxx.xxx.xxx
m.mydomain.com  IN A    xxx.xxx.xxx.xxx

Am I just being impatient?

Thoughts appreciated
Cheers
Mark

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2 answers
larry July 4, 2014

Have you tried checking Google’s DNS or another DNS provider? The DNS provider I use at home has occasionally taken a while to get some of its caches updated, requiring me to force an update.

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mark.davenport July 4, 2014

Thanks for the response, Larry. All sorted now. My fault. I was using a FQDN without the full-stop for the sub-domains. You should use just the sub-domain without a full-stop OR the FQDN with a full-stop … … .it says here ;-)

Cheers
Mark

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