216.73.216.221

Recent Activity This IP has received recent abuse reports, which causes the score to increase.
Abuse Confidence Score
100% Critical
431 reports
148 reporters · latest 8 hours ago
ISP
Anthropic, PBC
Usage Type
Data Center/Web Hosting/Transit
ASN
AS16509
Domain Name
anthropic.com
Country
🇺🇸 United States of America
City
Columbus, Ohio
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Abuse Reports

Total reports
431 from 148 distinct reporters
First reported
Most recent report
Last 60 days
Top reporter locations 🇫🇷 France 28 🇩🇪 Germany 22 🇪🇸 Spain 17
Most common categories Brute-Force 61 Web App Attack 39 Bad Web Bot 36 Hacking 31 Port Scan 16
Recent reports We have received reports of abusive activity from this IP address within the last week. It is potentially still actively engaged in abusive activities.
Reporter IoA Timestamp (UTC) Comment Categories
🇪🇸 masterguru
BAD BOT - Detected and Blocked.. Matched phrase "claudebot" at REQUEST_HEADERS:user-agent. (1100000-122)
Bad Web Bot
🇬🇧 seniorlinuxadmin
216.73.216.221 - - [06/Nov/2026:16:22:20 +0000] "GET / HTTP/2.0" 403 158 "-" "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])"
Port Scan Web App Attack
🇫🇷 security.rdmc.fr
Activity from blacklisted IP
Hacking
🇬🇧 Mendip_Defender
216.73.216.221 - - [05/Nov/2026:15:48:09 +0000] "GET /robots.txt HTTP/1.1" 304 6642 "-" "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])" ...
Bad Web Bot
Anonymous
IP matched detection query 20 more in short time bad rqs.
Brute-Force Web App Attack Hacking
🇩🇪 Séfora Srl
crowdsecurity/http-probing detected by CrowdSec
Web App Attack
🇩🇪 palzer.IT
Report for plesk-apache-badbot: 216.73.216.221 - - [01/Oct/2026:19:25:00 +0200] GET /robots.txt [DOMAIN_REMOVED] 200 5926 - Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@[DOMAIN_REMOVED])
Bad Web Bot
🇫🇷 security.rdmc.fr
Activity from blacklisted IP
Hacking
🇷🇴 iulianh
80,443
Brute-Force SSH
🇫🇷 security.rdmc.fr
Activity from blacklisted IP
Hacking
🇫🇷 Campus France
...
Brute-Force
Anonymous
IP matched detection query Many sub paths, bad urls forwarding.
Brute-Force
🇩🇪 palzer.IT
Report for plesk-apache-badbot: 216.73.216.221 - - [01/Oct/2026:19:25:00 +0200] GET /robots.txt [DOMAIN_REMOVED] 200 5926 - Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@[DOMAIN_REMOVED])
Bad Web Bot
🇫🇷 Campus France
...
Brute-Force
🇩🇪 Viveronese
HTTP vulnerability scanning
Web App Attack

Think this IP has been falsely reported? You may request to have the associated reports reviewed and removed. Request Takedown

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