US Patent 10044852 Dynamic dual-mode service access control, location-based billing, and E911 mechanisms

A system that facilitates controlling network access comprises a lookup component that determines a geographic location associated with a public originating IP address, wherein the public originating IP address is associated with a request for dual mode services made by a dual mode client. A comparison component compares the determined geographic location with a retained geographic location associated with the dual mode client and determines whether to enable dual mode services based at least in part upon the comparison.