Domain > 51ydu.com

More information on this domain is in AlienVault OTX

DNS Resolutions

Date	IP Address
2019-11-30	154.88.167.194 (ClassC)
2020-06-02	107.178.132.119 (ClassC)
2020-10-17	154.80.233.219 (ClassC)
2025-04-17	104.21.48.1 (ClassC)
2025-04-17	104.21.112.1 (ClassC)
2025-04-17	104.21.64.1 (ClassC)
2025-04-17	104.21.80.1 (ClassC)
2025-04-17	104.21.16.1 (ClassC)
2025-04-17	104.21.96.1 (ClassC)
2025-04-17	104.21.32.1 (ClassC)
2025-09-20	104.21.13.207 (ClassC)
2026-02-03	172.67.133.26 (ClassC)

HTTP/1.1 403 ForbiddenDate: Tue, 03 Feb 2026 13:19:06 GMTContent-Type: text/html; charsetUTF-8Transfer-Encoding: chunkedConnection: closeaccept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UAcf-mitigated: challengecritical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UAcross-origin-embedder-policy: require-corpcross-origin-opener-policy: same-origincross-origin-resource-policy: same-originorigin-agent-cluster: ?1permissions-policy: accelerometer(),browsing-topics(),camera(),clipboard-read(),clipboard-write(),geolocation(),gyroscope(),hid(),interest-cohort(),magnetometer(),microphone(),payment(),publickey-credentials-get(),screen-wake-lock(),serial(),sync-xhr(),usb()referrer-policy: same-originserver-timing: chlray;desc9c8237d3ce95ef2cx-content-type-options: nosniffx-frame-options: SAMEORIGINCache-Control: private, max-age0, no-store, no-cache, must-revalidate, post-check0, pre-check0Expires: Thu, 01 Jan 1970 00:00:01 GMTReport-To: {endpoints:{url:https:\/\/a.nel.cloudflare.com\/report\/v4?sfb5llGAdVeuN9irly0fTOPshMJl7uzdiKeVkzghOg2ClHUCbY%2FyQ3eyrAwSt0QotBsuzVRmVnyfat%2F6swNnNtUm3Lz%2BphnWc9oJexqA5MmEntdVMUvOkUNnAaTM%3D},group:cf-nel,max_age:604800}NEL: {success_fraction:0,report_to:cf-nel,max_age:604800}Server: cloudflareCF-RAY: 9c8237d3ce95ef2c-PDXalt-svc: h3:443; ma86400server-timing: cfL4;desc?protoTCP&rtt6139&min_rtt6139&rtt_var3069&sent1&recv3&lost0&retrans0&sent_bytes0&recv_bytes48&delivery_rate0&cwnd249&unsent_bytes0&cid0000000000000000&ts0&x0

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Port 443

HTTP/1.1 403 ForbiddenDate: Tue, 03 Feb 2026 13:19:06 GMTContent-Type: text/html; charsetUTF-8Transfer-Encoding: chunkedConnection: closeaccept-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UAcf-mitigated: challengecritical-ch: Sec-CH-UA-Bitness, Sec-CH-UA-Arch, Sec-CH-UA-Full-Version, Sec-CH-UA-Mobile, Sec-CH-UA-Model, Sec-CH-UA-Platform-Version, Sec-CH-UA-Full-Version-List, Sec-CH-UA-Platform, Sec-CH-UA, UA-Bitness, UA-Arch, UA-Full-Version, UA-Mobile, UA-Model, UA-Platform-Version, UA-Platform, UAcross-origin-embedder-policy: require-corpcross-origin-opener-policy: same-origincross-origin-resource-policy: same-originorigin-agent-cluster: ?1permissions-policy: accelerometer(),browsing-topics(),camera(),clipboard-read(),clipboard-write(),geolocation(),gyroscope(),hid(),interest-cohort(),magnetometer(),microphone(),payment(),publickey-credentials-get(),screen-wake-lock(),serial(),sync-xhr(),usb()referrer-policy: same-originserver-timing: chlray;desc9c8237d43bcf87abx-content-type-options: nosniffx-frame-options: SAMEORIGINCache-Control: private, max-age0, no-store, no-cache, must-revalidate, post-check0, pre-check0Expires: Thu, 01 Jan 1970 00:00:01 GMTReport-To: {endpoints:{url:https:\/\/a.nel.cloudflare.com\/report\/v4?s9usMBI13l0qiDhTYEsnIWXxMQm2c7Dyjdc4hI917EFP7KeziboV%2F8W%2Fvj7iFVnRmfTJRFWet8jJ%2FwTlA7NWhQJgoefymO9LgptlYrrYo7SUqi5m3%2Btj3JBfF1ng%3D},group:cf-nel,max_age:604800}NEL: {success_fraction:0,report_to:cf-nel,max_age:604800}Server: cloudflareCF-RAY: 9c8237d43bcf87ab-PDXalt-svc: h3:443; ma86400server-timing: cfL4;desc?protoTCP&rtt5559&min_rtt5493&rtt_var1600&sent4&recv6&lost0&retrans0&sent_bytes2842&recv_bytes720&delivery_rate512113&cwnd251&unsent_bytes0&cide4f8c15e2265f495&ts27&x0

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Domain > 51ydu.com

Is this malicious?

DNS Resolutions

Port 80

Port 443