You may lose access to ACS content if a user on your campus accidentally triggers an IP block due to excessive downloading, excessive sessions, or spider trap activity. This can be the result of a number of issues, many of which are accidental. Contact our Customer Service and Support team immediately for assistance at acs_pubs_assist@acs.org or (888) 338-0012 from 8:30 AM to 5 PM (Eastern Time). If calling from outside the US, the number is +1 (614) 447-3674. For more information see our Managing IP Blocks page.