A mobile device may transition between Extended Service Set (“ESS”) networks while maintaining the same internet protocol (“IP”) address while transitioning. The transition may occur seamlessly, such that a consumer never loses the network connection despite transitioning between networks. The mobile device may receive an IP address from a pool of addresses, such that the mobile device can keep that IP address as it is transitions between networks that each have access to the pool. The assignment of the IP address to the mobile device is from the pool of IP addresses rather than from the AP.