Marshall & Swift® Cost Approach | CoreLogic®
Support. The CoreLogic® Technical Support Center is available for customer inquiries or support by calling 800-544-2678. Select Option 1 for tech support. You can also send an email to is.support@corelogic. Hours of Operation (U.S. CST): Weekdays from 7:00 a.m. to 7:00 p.m.