1) Every service most likely has many, many different servers providing it. These may have different hostnames. Particularly consider that Apple uses a lot of c

1) Every service most likely has many, many different servers providing it. These may have different hostnames. Particularly consider that Apple uses a lot of cloud services. 2) All the services you list in fact consist of many smaller services. iTunes alone is a storefront, a CDN, a payment processing service, a DRM system, a syndication service, an account management service, a media library synchronisation service, a streaming media service, and so on. iCloud is a blanket name for a large collection of big services which themselves may consist of many smaller services. 3) That isn’t even the full set of services. In light of these considerations, 1000 hostnames should not be unexpected. That might even be a surprisingly small figure.