Methods and systems for facilitating content accessibility via different communication formats are provided. According to one embodiment, a method is provided for directing content requests to an appropriate server. Information indicative of one or more communication formats via which a client device is capable of communication is caused to be stored on a client device by (i) sending to the client device a web page having embedded therein one or more of IPv4 and IPv6 test content; and (ii) based on a response to the test content, determining communication capabilities of the client device. A result of the determination is stored within a browser cookie, which is sent to the client device. A content request is received from the client device that includes the browser cookie. The request is redirected to a server appropriate for the communication capabilities of the client based at least in part on the cookie.