ASI RDD samples offer researchers a high quality, low cost alternative to the more expensive RDD samples available from other sampling companies. What's more, ASI RDD samples are properly balanced and produced from the most up-to-date files of telephone exchanges and working blocks, thus relieving you of the complexity of maintaining an in-house RDD system. RDD samples may be ordered in terms of standard geographic definitions: national, state, county or zip. Targeted RDD samples are also available, including high income, Black, Hispanic and others. RDD samples are shipped within 24 hours via email, modem or printed on call record sheets.