IT Incident Response - Reporting Incidents and Vulnerabilities

Amazon Web Services (AWS) Takedown Request
California Breach Reporting
Cloudflare Abuse Reporting
FBI Internet Crime Complaint Center (IC3)
Federal Trade Commission (FTC) Complaints
Google Takedown Request
HackerOne
Hackmageddon
HIPAA Breach
Internet Storm Center (ISC)
Interpol
ISP Technical Contacts
Microsoft Takedown Request
National White Collar Crime Center (NW3C)
Salesforce Abuse Reporting
United Kingdom Information Commissioner's Office
US-CERT