EXHIBIT 21 CMG INFORMATION SERVICES, INC. Subsidiaries of the Registrant 1. CMG @Ventures, Inc., a Delaware corporation. 2. CMG Securities Corporation, a Massachusetts corporation. 3. CMG @Ventures Capital Corporation, a Delaware corporation. 4. CMG @Ventures I, L.L.C., a Delaware limited liability company (formerly CMG @Ventures, L.P.) 5. CMG @Ventures II, L.L.C., a Delaware limited liability company. 6. CMG Direct Corporation, a Delaware corporation. 7. SalesLink Corporation, a Massachusetts corporation. 8. Pacific Direct Marketing Corporation, a California corporation. 9. InSolutions Inc., a Delaware corporation. 10. On-Demand Solutions, Inc., a Massachusetts corporation. 11. Engage Technologies, Inc., a Delaware corporation. 12. Accipiter, Inc., a Delaware corporation. 13. Blaxxun Interactive, Inc., a Delaware corporation. 14. Planet Direct Corporation, a Delaware corporation. 15. ADSmart Corporation, a Delaware corporation. 16. InfoMation Publishing Corporation, a Delaware corporation. 17. NaviSite Internet Services Corporation, a Delaware corporation. 18. Servercast Communications, L.L.C., a Delaware limited liability company. 19. Password Internet Publishing Corporation, a Delaware corporation. 20. Vicinity Corporation, a California corporation.