[tw04]

>What I find odd is that they would colocate their hardware in a DC with only a single provider.

I think it's extremely unlikely the provider only has cogent. More likely is the fact that the link between the provider and comcast preferred cogent - which panic would have no way to change.

[gcbirzan]

That's not true. panic.com has an A record (and www is a CNAME to @) that points to an IP address that's not PI and advertised only as part of 38.0.0.0/8, obviously, only from Cogent.