1. A method for assigning a server of a content delivery network (CDN), the method comprising: receiving a request for a content object at a first point of presence (POP), which is one of a plurality of POPs that comprise the CDN and are distributed across the Internet; returning a first Internet protocol (IP) address, which routes to any of the plurality of POPs using Anycast; receiving the request at a second POP using the first IP address; redirecting a user computer to request the content object from the second POP using a second IP address instead of the first IP address, wherein: the second POP provides the second IP address to the user computer; the second IP address is unique to the second POP; and the second IP address is not an Anycast IP address; receiving the request at the second POP using the second IP address, responsive to a request from the user computer; determining a server device associated with the second IP address; and serving the content object from the second POP, using the server device addressed by the second IP address, to the user computer.