Source CIDR

AhrefsBot

Ahrefs publishes crawler IP ranges via their public API.

Autonomous systems

BGP & hosting context

Ahrefs does not operate its own autonomous system. AhrefsBot traffic is commonly seen on commercial hosting; treat ASN as a hint only and confirm with reverse DNS and their official crawler IP API.

Third-party hosting & clouds

OVH SAS

AS16276

Example PTR observed in the wild: proxy-fr005-san224.ahrefs.net

Documentation

Semrush Bot Another SEO crawler where IP identity matters. MJ12 Majestic crawler context and maintained ranges. Lumar SEO crawler ranges from an official source. Common Crawl Open web crawler with a machine-readable CCBot feed.