Go to Help > About to see information about the service. You'll see a list of Security Operations Centers (SOCs) identified with the IP addresses for service's external scanners under Qualys External Scanners, that you might need to whitelist, a list of SOCs identified with URLs for scanner appliances must contact under Qualys Scanner Appliances, plus additional service information for your reference.
Tell me about External Scanners
Tell me about Scanner Appliances
Tell me about identified services