Access to telecommunication devices using mobile phone numbers

A registration server (118), comprising: a processor (302; 402; 502) configured to receive: a request from a telecommunications device (110; 212) having an address of the Internet Protocol, IP, to add telecommunications device to an info-sphere (108) associated with a mobile phone (206) having a telephone number, where info-sphere is a collection of devices that share a common scheme address management, based on the phone number; the address of the Internet Protocol, IP, telecommunications device (110; 212); and the phone number of the mobile phone (206); and in response to the request and in response to the authorization of a mobile phone user to add the telecommunications device to the info-sphere, creating a network address for the telecommunications device, the network address related being with the phone number of the mobile phone, and associating the network address with an IP address.