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I'm using a subdomain for tumblr, and I found out that there's an issue with my ISP resolving the A Name record for tumblr. A solution for this is to include multiple A Name records for the subdomain, but I don't appear to be able to have more than one A Name record for blog.*

The instructions are:

To do this you must create additional A records in your DNS settings that point to your site. Just repeat the standard Tumblr instructions for setting up a custom domain name to create an A record for each of the following IP addresses:

50.22.53.155
50.22.53.157
72.32.231.8 (the default Tumblr IP address)
174.121.98.156
174.121.66.230


and I always receive the error message "You entered two subhosts that are the same."

Is there anything that I can do?


 [This post has been edited by erinm on Jan 25, 2012 4:24am.]

+1 for the request to allow multiple A records for the domain.  Google Blogger, too, requires this.

Just out of curiosity, does anyone know why Google instructs me to use a CNAME record to resolve www.<domain>.com to their server ghs.google.com, but to use A records to resolve <domain>.com to multiple (other) servers?  Is a CNAME record not allowed for the root domain?

Tumblr offers multiple IP addresses for redundancy,  but they are not required.  You can still connect by using just one IP for your main domain record.

Any chance of fixing this?

as well as Tumblr, Heroku require 3 A Name records if you want host with them (you can use C Name but this prevents you using MX records).

Heroku is gaining popularity every day but this restriction pretty much prevents Heroku users using Dynadot (and means I'll probably have to switch to GoDaddy or another domain registrar if I want free DNS and Heroku - Heroku itself has a DNS add-on but the free-tier isn't very generous)

While we do offer up to 20 subdomain records,  we can currently support only one record for your main domain.