Call blocking (Call Screening) is a feature that may be placed on your telephone number. The Windstream Law Enforcement Support Center is not able to add features. Call blocking/screening is not available in all areas. For assistance with the call screening feature, or any other feature/alternate solutions, please speak to a Windstream customer service representative for more information. Contact the Business Office number found on your Windstream bill, or find contact phone numbers on Windstream.com.