Method and OTT (Over The Top) service providing node for retrieval of geographic location information of a communication device. The communication device is communicatively connected to the OTT service providing node via a communication network. A request for an OTT service is received 400 from the communication device, and an identifier of the communication device is determined 402. Further, an operator of the communication device is determined 404, by utilising the determined identifier of the communication device; and an identifier of an OLS (Operator Location Service) node of the operator is determined 406. A location request is sent 408 to the OLS node for requesting geographic location information of the communication device, the location request comprising the identifier of the communication device, the identifier of the communication device to be utilised by the OLS node for retrieving the requested geographic location information from a location server, and the retrieved geographic location information to be sent by the OLS node to the OTT service providing node. The sent geographic location information is received 410. By arranging OLS nodes and storing appropriate identifiers of the OLS nodes in DNSs, an OTT service providing node may retrieve accurate geographic location information of host from appropriate location servers.