Register for and method of providing contact information for a communications unit identified by a uniform resource name

An accessor location register used for storing and retrieving information required to contact a communications unit, the accessor location register being part of a communications system infrastructure and comprising in combination:

• a memory including a database containing uniform resource names (URNs) cross referenced to uniform resource locators (URLs), and
• a controller for accessing said database to determine whether a URL corresponding to a URN for the communication unit is available;
• when said URL is available;
• initiating, using said URL, a first contact attempt with the communications unit;
• and contacting, using said URN, a home location register to validate said URL;
• and
• when said URL is not available;
• contacting, using said URN, said home location register to obtain said URL and then, using said URL, initiating a second contact attempt with the communications unit.