A new alternative TLD is now supported for custom domains: .com
When using a custom domain, such as status.example.com, you must create a CNAME record pointing to domain.status.io.
Now you may choose between the .io or .com TLD.
.io should use domain.status.io
.com should use domain.statusio.com
Why does it matter?
TLD’s are each controlled by different entities, different infrastructure, etc. We all saw the .io TLD experience issues early in 2013. While we can’t prevent a TLD issue, we decided to offer multi-TLD’s so our customers can choose which TLD they wish to utilize.