It's possible it was.
But only a relatively small one. You find the real datacenters in the midwest, along the old Minuteman network. The fiber busses which interconnected the missiles was sold to the commercial telecom companies after the silos were decommissioned. That is where the majority of all internet traffic flows in the U.S.
You won't find them with a simple google search. You will need to look a bit more carefully at construction reports and land purchase deals. If you search for microsoft or ibm - each of which have a large data center, you won't find them in a search. You will find office buildings in cities, which are just the store front for marketing the services.
Whoever levied this attack either did not do their research, or had other motives.