1. Enum is a Domain Name Tom McGarry NeuStar 571-434-5570 tom.mcgarry@neustar.biz

2. Enum is a Domain Name Enum takes an E.164 telephone number and turns it into an Internet domain name. +1 202-555-1234 = 4.3.2.1.5.5.5.2.0.2.1.e164.arpa The Domain Name System (DNS) is the infrastructure that supports addressing (i.e., routing) for the Internet. Why turn telephone numbers into domain names? –Devices traditionally addressed with telephone numbers are becoming Internet-enabled, e.g., telephones, fax machines. To understand Enum, one must first understand the DNS.

3. Domain Name Resolution

4. Domain Name Service Activation

5. Enum Domain Name Resolution

6. Enum Service Activation

7. DNS Issues Inherited by Enum Privacy –Whois –Enum service records Rights of existing name holders Selection of Registry