Communication system

A method comprising:

• receiving a request for locations of a plurality of devices for communicating in a network, said request comprising an identifier for identifying said plurality of devices;
• checking whether each of two or more devices of said identified plurality of devices has been registered on the network;
• in response to determining that at least one device of the two or more devices has been registered on the network, determining and reporting at least one location for the at least one device determined to be registered on the network;
• and
• in response to determining that at least one device of the two or more devices has not been registered on the network, storing in memory at least one indication of at least one pending request for at least one location of the at least one device not registered on the network.

A non-transitory computer readable medium comprising program instructions for causing an apparatus to perform at least:

• receiving a request for locations of a plurality of devices for communicating in a network, said request comprising an identifier for identifying said plurality of devices;
• checking whether each of two or more devices of said identified plurality of devices has been registered on the network;
• in response to determining that at least one device of the two or more devices has been registered on the network, determining and reporting at least one location for the at least one device determined to be registered on the network;
• and
• in response to determining that at least one device of the two or more devices has not been registered on the network, storing in memory at least one indication of at least one pending request for at least one location of the at least one device not registered on the network.