24x7 Availability: Online: Use our Inquiry/Support Page Toll Free: 1-877-CRITERION (877-274-8374) Telephone: (925) 251-0566 e-Mail: inquiries@criterion.net Snail Mail: Criterion Networks Headquarters 740 Tunbridge Road Danville, CA 94526 Operations Center: operations@criterion.net Location: Castro Valley, CA Network Datacenter: datacenter@criterion.net Location: Oakland, CA