A spectrum server for allocating available broadcast spectrum resources to enable dynamic carrier aggregation of spectrum resources, the spectrum server comprising: one or more processors, and memory storing program instructions, wherein the program instructions, when executed by the one or more processors, cause the one or more processors to: receive information indicating broadcast spectrum made available by one or more broadcast networks; dynamically assign at least a portion of the available broadcast spectrum to a wireless broadband network in response to a request from the wireless broadband network, wherein the broadband network includes a plurality of base stations configured to communicate with user equipment devices using aggregated spectrum resources including cellular broadband spectrum and broadcast spectrum, wherein said assigned at least a portion is defined by one or more intervals of resource block numbers according to a partition of the available broadcast spectrum into resource blocks of fixed width; and transmit a message to the wireless broadband network enabling the base stations of the wireless broadband network to transmit to said user equipment devices using said at least a portion of the available broadcast spectrum, wherein the message identifies the one or more intervals of resource block numbers. one or more processors, and memory storing program instructions, wherein the program instructions, when executed by the one or more processors, cause the one or more processors to: receive information indicating broadcast spectrum made available by one or more broadcast networks; dynamically assign at least a portion of the available broadcast spectrum to a wireless broadband network in response to a request from the wireless broadband network, wherein the broadband network includes a plurality of base stations configured to communicate with user equipment devices using aggregated spectrum resources including cellular broadband spectrum and broadcast spectrum, wherein said assigned at least a portion is defined by one or more intervals of resource block numbers according to a partition of the available broadcast spectrum into resource blocks of fixed width; and transmit a message to the wireless broadband network enabling the base stations of the wireless broadband network to transmit to said user equipment devices using said at least a portion of the available broadcast spectrum, wherein the message identifies the one or more intervals of resource block numbers. receive information indicating broadcast spectrum made available by one or more broadcast networks; dynamically assign at least a portion of the available broadcast spectrum to a wireless broadband network in response to a request from the wireless broadband network, wherein the broadband network includes a plurality of base stations configured to communicate with user equipment devices using aggregated spectrum resources including cellular broadband spectrum and broadcast spectrum, wherein said assigned at least a portion is defined by one or more intervals of resource block numbers according to a partition of the available broadcast spectrum into resource blocks of fixed width; and transmit a message to the wireless broadband network enabling the base stations of the wireless broadband network to transmit to said user equipment devices using said at least a portion of the available broadcast spectrum, wherein the message identifies the one or more intervals of resource block numbers.