Digital Realty and Equinix both have multiple huge datacenters, the Informart[1] houses several gigantic datacenters inside of one building (it's mind boggling how utterly big it is), Internap has an absolutely gigantic facility there, Rackspace has I think their biggest facility here, and then there's a smattering of smaller datacenters (in and out of the Infomart) owned by every major player.

There's so much space here that most companies have only recently started chasing after highly dense stuff (like 60+ drive arrays in 4U, hyper-dense blades, etc) because there just is no need to.

And as a side note, Texas now operates the largest number of wind turbines (by MW) and I think per capita as well. Texas now generates so much power that they regularly sell it to nearby states because the whole "long term storage" problem hasn't been solved at the scale Texas needs it to be...

Which means not only is datacenter space plentiful, the power is often less expensive than it is in other markets.

1: https://en.wikipedia.org/wiki/Infomart

Northeast of Dallas, I know of at least 2 being built, and I suspect at least 3 others. I'm sure there are many, many more.

RagingWire is possibly the largest single company building a single campus/facility at the moment[0], and only about 2 miles from my house. It's quite impressive when you drive by and see the utterly massive power substation they built across the street too.

While the Telecom Corridor[1] name is somewhat dated, it's still growing.

[0]: http://www.ragingwire.com/wholesale/wholesale-data-center-da...

[1]: https://en.wikipedia.org/wiki/Telecom_Corridor

edit: formatting

There are several data centers that are being built around the Toyota facility in Plano, but none are branded as Toyota data centers - I'm assuming that's what you mean. They aren't online yet.

I'd also add that Softlayer is based in Dallas, and operates several data centers throughout the DFW area.

I've always thought the Rackspace data center there was more well known.