Free tool
Find the company behind an IP address
Enter a public IP address and see which organization owns that network — company name and domain. This is the same lookup PageFox runs on your website traffic to show you which companies are visiting, even when nobody fills out a form.
Company-level only: this resolves the network owner behind a public IP. It never identifies a person. The address is looked up, not stored.
What a reverse IP lookup can and can't tell you
Every visit to a website arrives from an IP address, and every public IP belongs to a registered network owner. When that owner is a company network, the lookup names the company — that's how B2B visitor identification works. When it's a consumer ISP, mobile carrier, or VPN, the lookup names the provider instead, which is why home and mobile visitors stay anonymous. This tool tells you honestly which case you hit.
On your own site, PageFox runs this continuously: company-network visits are matched, logged with pages viewed and time on site, and scored for buying intent — so you see which companies researched you and what they cared about. Start Free to see the companies already visiting your site.