ASN WHOIS

What is this tool?

Enter a valid ASN (Autonomous System Number) and this tool will retrieve information about it from the qualified IP registrar it belongs to.

How do the results help me?

• IP administration
• Spam Prevention
• Fighting Spam

Use this tool to query the IP registrar's database for information about a block of IPs, complete with contact information. Useful for escalating a spam complaint or verifying the status of one's own IP block.