h5[.]coinbase666[.]com

Analysis indicates that h5.coinbase666.com was registered on May 06 2026 via Gname.com Pte. Ltd. The domain resolves to 104.21.55.141, a Cloudflare edge node located in Canada. The authoritative nameservers are collins.ns.cloudflare.com and javon.ns.cloudflare.com, confirming Cloudflare hosting. The site presents a page title identical to the domain and is classified as a brand impersonation targeting Coinbase. The SSL certificate is issued by Google Trust Services under the WE1 root, indicating a valid TLS certificate despite malicious intent. Cloudflare services including HTTP/3 are detected, and the HTTP response code is 521, consistent with Cloudflare's error for no origin server response. Reputation scoring from Gridinsoft is 0/100, and 16 of 91 VirusTotal scanners have flagged the domain. It appears on one public blocklist and has been added to the PhishDestroy blocklist. The infrastructure suggests a typical phishing deployment that leverages reputable CDN services to obscure the true hosting location. Uncertainties remain regarding the content served at the URL, as the HTTP 521 status prevents retrieval of the page body, and no detailed analysis of payload or credential capture mechanisms is available. The presence of a valid TLS certificate and Cloudflare's CDN does not mitigate the threat but rather aids evasion. Defenders should immediately block DNS resolution for h5.coinbase666.com, add the IP address 104.21.55.141 to network deny lists, and monitor for any outbound connections to this address. Continuous scanning of the domain with updated threat‑intelligence feeds is advised, as the infrastructure may shift to new IPs or sub‑domains. Alerting users about potential Coinbase impersonation attempts and encouraging verification of URLs can reduce successful exploitation.