SE Ranking
OfficialSE Ranking publishes a live JSON/text API of BacklinksBot crawler IPs (IPv4 and IPv6). Fetch the API periodically rather than hard-coding. For Website Audit / SEBot-WA verification, SE Ranking documents rDNS on *.sr-srv.net in their help center.
Autonomous systems (ASNs)
Known ASNs used by SE Ranking.
Hosting context
Third-party hosting & clouds
Hetzner Online GmbH
AS24940
SE Ranking crawler traffic is often seen on AS24940; prefer the official BacklinksBot API and SE Ranking docs over broad ASN allowlists.
SERankingBacklinksBot IPs
Official feedIPv4 by default; IPv6 via ?v=6; plain text via ?txt=1.