Ask your real estate agent who services the area with cable when moving into a new town. The company your agent works for will likely have a list of to-do items when moving, as well as a listing of utility providers.
Examine your bank statement for payments that are automatically derived. When you have an automatic payment set up it is easy to go months, even years without needing to contact your provider. In this time you can loose track of important addresses and phone numbers. Luckily, your bank statement will list the name and telephone number for the company that pulls out the automatic payment.
Enter the name of your cable provider into a directory search and find the mailing address and telephone number listed for the company. Likewise, use a reverse directory to enter an address that will provide a telephone number and name information.