IMS is the country's largest single-source supplier of Wireless Identification and TCPA compliance Products, including querying the Reassigned Number Database (RND) on behalf of callers. We serve marketers, debt collectors and many other organizations in need of identifying, blocking and managing calls to wireless devices. IMS pioneered the concept of identifying wireless telephone numbers by introducing our proprietary Wireless Block Identifier which can identify over 95% of the cell phones.