By the way, how do people reach you from the outside world? Do you have a phone number that they can dial to connect directly to the phone at your desk? In other words, they don't have to go through an operator or an automated service from your company's main number to reach your extension? Usually the last 4 or 5 digits of that phone number represent your extension. DID's are ordered in blocks of 20 through your service provider. For example, if your extension is 3133 and your full phone number is (216) 555-3133, the DID range might be (216) 555- 3130 through (216) 555-3149. You could verify it through the service provider who maintains your DID ranges (again, typically the same company that supplies you local or long distance service over a T1.