Consider talking openly with your child about your suspicions. Tell them about the dangers of computer-sex offenders.
Devices can be purchased that show telephone numbers that have been dialed from your home phone. Additionally, the last number called from your home phone can be retrieved provided that the telephone is equipped with a redial feature. You will also need a telephone pager to complete this retrieval.
Monitor your child's access to all types of live electronic communications (i.e., chat rooms, instant messages, Internet Relay Chat, etc.), and monitor your child's e-mail. Computer-sex offenders almost always meet potential victims via chat rooms. After meeting a child on-line, they will continue to communicate electronically often via e-mail.
Review what is on your child's computer. If you don't know how, ask a friend, coworker, relative, or other knowledgeable person. Pornography or any kind of sexual communication can be a warning sign.
This is done using a numeric-display pager and another phone that is on the same line as the first phone with the redial feature. Using the two phones and the pager, a call is placed from the second phone to the pager. When the paging terminal beeps for you to enter a telephone number, you press the redial button on the first (or suspect) phone. The last number called from that phone will then be displayed on the pager.
Use the Caller ID service to determine who is calling your child. Most telephone companies that offer Caller ID also offer a service that allows you to block your number from appearing on someone else's Caller ID. Telephone companies also offer an additional service feature that rejects incoming calls that you block. This rejection feature prevents computer-sex offenders or anyone else from calling your home anonymously.