Phishing domain, IPv6, and reputation lookup

Use the vspam.org search to check whether a domain, IPv6 host, ASN, IP address, or email address has been reported as malicious or suspicious. The platform is shifting toward an operator-grade reputation model with community input, so search increasingly centers on domain intelligence, IPv6-first infrastructure, and ASN context.

What you can look up

• Phishing domains — check if a suspicious host or domain has been tied to credential harvest, brand impersonation, or abuse campaigns.
• Domain reputation — look up any domain to see if it is associated with phishing, malware distribution, or spam campaigns.
• IPv6 and IP reputation — check whether an exact IP address is listed for spam, botnet C2, or other abusive infrastructure activity.
• ASN reputation — inspect provider-level abuse density and infrastructure overlap when exact-host evidence is still sparse.
• Email sender verification — search for email addresses used in phishing or BEC (business email compromise) campaigns.

All lookups are free. For programmatic access, use the REST API or integrate our DNSBL feed directly into your mail server.