It wasn't that big of a setback. I started rummaging through the papers I had managed to take home just before I left my job at the phone company. And there it was—I had saved a repair ticket from once when there was a problem with the telephone line at Doug's, and the printout listed the cable and pair for his phone. See, you can change your phone number all you want, but you still have the same pair of copper wires running from your house to the telephone company switching office, called the Central Office, or CO. The set of copper wires from every house and apartment is identified by these numbers, called the cable and pair. And if you know how the phone company does things, which I do, knowing the target's cable and pair is all you need to find out the phone number.