Domains which were registered more than one year ago are now automatically highlighted on their right-hand-side:

These names are also all tagged Aged domains, aiding our SEO for this term. We may add a search filter for aged domains in the near future.

We’ve redesigned our listings pages to highlight age and other premium aspects of a domain name, such as short domains. Our intention is to make the value of premium domain names clearer.

Note that domains which are under a year old do not mention their age at all.