Semrush Bot
ASNSemrush documents SemrushBot behavior and robots.txt controls on semrush.com/bot. They advise against blocking the crawler by IP alone — prefer robots.txt and the official bot documentation with the ASN context below.
Autonomous systems (ASNs)
Known ASNs used by Semrush Bot.
BGP context
Semrush operates AS209366. Crawler traffic is also observed on Google Cloud (AS396982) and may traverse other providers at the edge; combine ASN context with Semrush’s bot documentation and your own traces rather than ASN-only blocking.
AS209366
Third-party hosting & clouds
Google LLC (GCP)
AS396982
SemrushBot egress is commonly seen from GCP addressing (AS396982) in addition to AS209366.