Free Tool
Reverse IP Lookup
Discover the hostname associated with any IP address — PTR records, ASN, and network ownership.
PTR Record
Maps an IP address back to a hostname via
in-addr.arpa
DNS zone. Used by mail servers to verify sender identity.
ASN Information
Autonomous System Number identifies the network operator that owns and routes the IP block. Essential for threat intelligence and network ownership research.
Build with Lookups & API
Explore the supported IP, domain, and security intelligence endpoints in the API reference. Requests use a workspace API key and your plan’s monthly lookup allowance.
Read the API documentation →