SemrushBot
Official KB for crawling and bot identification, with IPv4 prefixes published by Semrush for allowlisting.
Official sources
Published IPv4 prefixes
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85.208.96.0/24 -
185.191.171.0/24 -
85.208.98.128/25 -
85.208.98.32/28 -
85.208.98.48/28
Semrush
Semrush documents crawling behavior and identification in knowledge-base articles.
Autonomous systems
BGP context
Semrush operates its own autonomous system in BGP. Crawler traffic may still traverse additional providers at the edge in some regions; combine AS209366 with their KB guidance and your own traces.
Announced under this company
AS209366
Published ranges
Official documentation and feeds for each product—open the links for current ranges and verification guidance.