Along with what Ron and Debbie say, your Realtor should have helped you transfer over the utilities. That is, your Realtor should have provided you with the phone numbers and contact information before closing so that the utilities could be switched over into your name.
If that wasn't done, it's still likely that your Realtor has a list of all the services (electric, gas, water, etc.) and contact information for them. Otherwise, contact your city government for that contact information.