Web Security Service (WSS) data center prefixes are advertised on Google's AS15169. Customers wishing to peer with WSS can do so by peering with Google in any supported public internet exchange (IX). For a full list of IXs where Google participates, please visit https://www.peeringdb.com/net/433.
Please note that Google maintains an extensive global private network that many carriers privately peer with in order to offload Google traffic from their networks for cost savings and efficiency. Because so many carriers already peer with Google, we recommend that customers examine their routes to WSS data centers to see if they are already optimized by carrier-to-Google peering. If your traffic is already being efficiently routed to the Google network, the benefits of peering may be negligible.
Google maintains a “generally open” public peering policy and all requests are subject to their approval and terms. Google may support or require customers to use other peering methods which may have associated costs. All peering costs are the responsibility of the customer. Submit peering requests to Google at https://peering.google.com/#/options/peering.
Web Security Service