{ "ok": true, "domain": "checkdomain.de", "generated_at": "2026-08-10T22:51:15-05:00", "cache": { "hit": true, "ttl": 0 }, "score": { "total": 80, "label": "Good", "categories": { "dns": 70, "mail": 90, "security": 77, "network": 50, "availability": 100 }, "category_weights": { "dns": 25, "mail": 20, "security": 25, "network": 10, "availability": 20 }, "items": [ { "category": "dns", "title": "IPv4 (A)", "max_points": 30, "earned_points": 30, "lost_points": 0, "detail": "1 IPv4 address(es) detected." }, { "category": "dns", "title": "IPv6 (AAAA)", "max_points": 10, "earned_points": 0, "lost_points": 10, "detail": "0 IPv6 address(es) detected." }, { "category": "dns", "title": "Name server redundancy", "max_points": 20, "earned_points": 20, "lost_points": 0, "detail": "2 NS record(s); 2 or more required." }, { "category": "dns", "title": "SOA record", "max_points": 10, "earned_points": 10, "lost_points": 0, "detail": "Authoritative zone record." }, { "category": "dns", "title": "DNSSEC chain", "max_points": 15, "earned_points": 0, "lost_points": 15, "detail": "Both DS and DNSKEY are required." }, { "category": "dns", "title": "CAA policy", "max_points": 5, "earned_points": 0, "lost_points": 5, "detail": "Certificate authority restriction." }, { "category": "dns", "title": "DNS propagation", "max_points": 10, "earned_points": 10, "lost_points": 0, "detail": "Agreement between public resolvers." }, { "category": "mail", "title": "MX records", "max_points": 20, "earned_points": 20, "lost_points": 0, "detail": "2 MX record(s)." }, { "category": "mail", "title": "SPF", "max_points": 25, "earned_points": 25, "lost_points": 0, "detail": "SPF policy published." }, { "category": "mail", "title": "DMARC", "max_points": 25, "earned_points": 25, "lost_points": 0, "detail": "DMARC policy published." }, { "category": "mail", "title": "DKIM", "max_points": 20, "earned_points": 20, "lost_points": 0, "detail": "A DKIM selector was verified." }, { "category": "mail", "title": "MTA-STS", "max_points": 5, "earned_points": 0, "lost_points": 5, "detail": "Mail transport policy." }, { "category": "mail", "title": "TLS-RPT", "max_points": 5, "earned_points": 0, "lost_points": 5, "detail": "TLS reporting policy." }, { "category": "security", "title": "Valid TLS certificate", "max_points": 55, "earned_points": 55, "lost_points": 0, "detail": "73 day(s) remaining." }, { "category": "security", "title": "Certificate lifetime", "max_points": 10, "earned_points": 10, "lost_points": 0, "detail": "Full points require at least 30 days remaining." }, { "category": "security", "title": "HTTP security headers", "max_points": 35, "earned_points": 12, "lost_points": 23, "detail": "3 of 9 evaluated headers detected." }, { "category": "network", "title": "PTR reverse DNS", "max_points": 30, "earned_points": 30, "lost_points": 0, "detail": "PTR: checkdomain01.storefront.g1i.one" }, { "category": "network", "title": "IPv4 diversity", "max_points": 35, "earned_points": 20, "lost_points": 15, "detail": "Two or more IPv4 addresses receive full points." }, { "category": "network", "title": "IPv6 connectivity", "max_points": 35, "earned_points": 0, "lost_points": 35, "detail": "AAAA availability." }, { "category": "availability", "title": "DNS resolution", "max_points": 40, "earned_points": 40, "lost_points": 0, "detail": "At least one address family must resolve." }, { "category": "availability", "title": "HTTP response", "max_points": 40, "earned_points": 40, "lost_points": 0, "detail": "HTTP/2 200 " }, { "category": "availability", "title": "HTTPS final URL", "max_points": 20, "earned_points": 20, "lost_points": 0, "detail": "Final URL uses HTTPS." } ], "methodology": "Each category is normalized to 100. The total is the weighted sum: DNS 25%, Email 20%, Security 25%, Network 10%, Availability 20%.", "diagnostics": [ { "level": "ok", "title": "IPv4 (A)", "detail": "1 IPv4 address(es) detected.", "category": "dns", "max_points": 30, "earned_points": 30, "lost_points": 0 }, { "level": "error", "title": "IPv6 (AAAA)", "detail": "0 IPv6 address(es) detected.", "category": "dns", "max_points": 10, "earned_points": 0, "lost_points": 10 }, { "level": "ok", "title": "Name server redundancy", "detail": "2 NS record(s); 2 or more required.", "category": "dns", "max_points": 20, "earned_points": 20, "lost_points": 0 }, { "level": "ok", "title": "SOA record", "detail": "Authoritative zone record.", "category": "dns", "max_points": 10, "earned_points": 10, "lost_points": 0 }, { "level": "error", "title": "DNSSEC chain", "detail": "Both DS and DNSKEY are required.", "category": "dns", "max_points": 15, "earned_points": 0, "lost_points": 15 }, { "level": "error", "title": "CAA policy", "detail": "Certificate authority restriction.", "category": "dns", "max_points": 5, "earned_points": 0, "lost_points": 5 }, { "level": "ok", "title": "DNS propagation", "detail": "Agreement between public resolvers.", "category": "dns", "max_points": 10, "earned_points": 10, "lost_points": 0 }, { "level": "ok", "title": "MX records", "detail": "2 MX record(s).", "category": "mail", "max_points": 20, "earned_points": 20, "lost_points": 0 }, { "level": "ok", "title": "SPF", "detail": "SPF policy published.", "category": "mail", "max_points": 25, "earned_points": 25, "lost_points": 0 }, { "level": "ok", "title": "DMARC", "detail": "DMARC policy published.", "category": "mail", "max_points": 25, "earned_points": 25, "lost_points": 0 }, { "level": "ok", "title": "DKIM", "detail": "A DKIM selector was verified.", "category": "mail", "max_points": 20, "earned_points": 20, "lost_points": 0 }, { "level": "error", "title": "MTA-STS", "detail": "Mail transport policy.", "category": "mail", "max_points": 5, "earned_points": 0, "lost_points": 5 }, { "level": "error", "title": "TLS-RPT", "detail": "TLS reporting policy.", "category": "mail", "max_points": 5, "earned_points": 0, "lost_points": 5 }, { "level": "ok", "title": "Valid TLS certificate", "detail": "73 day(s) remaining.", "category": "security", "max_points": 55, "earned_points": 55, "lost_points": 0 }, { "level": "ok", "title": "Certificate lifetime", "detail": "Full points require at least 30 days remaining.", "category": "security", "max_points": 10, "earned_points": 10, "lost_points": 0 }, { "level": "warning", "title": "HTTP security headers", "detail": "3 of 9 evaluated headers detected.", "category": "security", "max_points": 35, "earned_points": 12, "lost_points": 23 }, { "level": "ok", "title": "PTR reverse DNS", "detail": "PTR: checkdomain01.storefront.g1i.one", "category": "network", "max_points": 30, "earned_points": 30, "lost_points": 0 }, { "level": "warning", "title": "IPv4 diversity", "detail": "Two or more IPv4 addresses receive full points.", "category": "network", "max_points": 35, "earned_points": 20, "lost_points": 15 }, { "level": "error", "title": "IPv6 connectivity", "detail": "AAAA availability.", "category": "network", "max_points": 35, "earned_points": 0, "lost_points": 35 }, { "level": "ok", "title": "DNS resolution", "detail": "At least one address family must resolve.", "category": "availability", "max_points": 40, "earned_points": 40, "lost_points": 0 }, { "level": "ok", "title": "HTTP response", "detail": "HTTP/2 200 ", "category": "availability", "max_points": 40, "earned_points": 40, "lost_points": 0 }, { "level": "ok", "title": "HTTPS final URL", "detail": "Final URL uses HTTPS.", "category": "availability", "max_points": 20, "earned_points": 20, "lost_points": 0 } ] }, "dns": { "records": { "A": [ "31.47.251.5" ], "AAAA": [], "CNAME": [], "MX": [ "20 m2.checkdomain.de.", "10 m1.checkdomain.de." ], "TXT": [ "\"teamviewer-sso-verification=2b4fee964a8c4e6996c85993bdfceea3\"", "\"pandadoc-domain-verification=be4pxxLjnr7zjZP8CGnMxe\"", "\"google-site-verification=I0k-91zTnc8en6LAb7lt91WCg7rBlINQFic7CuplaP4\"", "\"slack-domain-verification=0HwLoCeQR6NKLoHLzYRHNapepuf2S14afrziBMYN\"", "\"Sendinblue-code:ed3757f69b55cef27022dda6ad660908\"", "\"mixpanel-domain-verify=9b584196-8e5c-4aed-b33e-348f7385750b\"", "\"atlassian-domain-verification=KKeihQSanTHe0l1pqlAF48oghg9rSqxhRZakMd/Gq8e8xTF/maaW2agw60HZU5va\"", "\"MS=ms69699864\"", "\"v=spf1 include:_spf.cio.g1i.one include:mx.spf.checkdomain.de include:web1.spf.checkdomain.de include:spf.protection.outlook.com include:secure-mailgate.com include:mail.zendesk.com ip4:212.123.41.224/28 ip6:2a01:4f8:221:11cd:9734:4c26:6044:5f33 include:\" \"_spf.hostedemail.com ~all\"", "\"ZOOM_verify_swigHX81TKO6Lpvl3mzY_Q\"", "\"ahrefs-site-verification_d51df861c42b3f97717ea844ad7c9cf7869c6d6ac16ba335f07b76b3d41c3da8\"", "\"apple-domain-verification=axE5Zek5oqkQpmY1\"", "\"docker-verification=672e8e8e-3881-4f08-abdf-9b53d432afed\"" ], "NS": [ "ns2.checkdomain.de.", "ns.checkdomain.de." ], "SOA": [ "ns.checkdomain.de. hostmaster.checkdomain.de. 2026052702 40000 7200 604800 180" ], "CAA": [], "DS": [], "DNSKEY": [], "RRSIG": [], "NSEC": [], "NSEC3": [], "SRV": [], "NAPTR": [], "TLSA": [], "SSHFP": [] }, "ipv4": [ "31.47.251.5" ], "ipv6": [] }, "mail": { "spf": "v=spf1 include:_spf.cio.g1i.one include:mx.spf.checkdomain.de include:web1.spf.checkdomain.de include:spf.protection.outlook.com include:secure-mailgate.com include:mail.zendesk.com ip4:212.123.41.224/28 ip6:2a01:4f8:221:11cd:9734:4c26:6044:5f33 include:_spf.hostedemail.com ~all", "dmarc": "v=DMARC1; p=none; sp=none;rua=mailto:dmarc@cp.wum.dogado.net,mailto:dmarc@mailinblue.com!10m;ruf=mailto:dmarc@cp.wum.dogado.net,mailto:dmarc@mailinblue.com!10m; rf=afrf; pct=100;ri=86400", "dkim_selector": "selector1", "dkim_host": "selector1._domainkey.checkdomain.de", "dkim": "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDoTISG+IbFD0BsJP40R7GrGABGbphNh/uGOziwAtxUm2aSlNsRr6baKAhE3k6t41ASFx51dl9OuTbDzuVPFgxba3SAByYRGCUvM0uBImwH2qe8+vQRmHDy0Cb0PPfIvFDhH2yk+sPmC+vJ3M+fHtPS/VuCfjX9wJ6wxqJCpo/p8QIDAQAB;", "spf_analysis": { "valid": true, "lookups": 7, "final": "~all", "message": "Within the estimated limit" }, "dmarc_analysis": { "valid": true, "policy": "none" }, "bimi": "v=BIMI1; l=https://bimi.group-cdn.one/checkdomain/v1/logo.svg; a=https://bimi.group-cdn.one/checkdomain/v1/cert.pem", "mta_sts": "", "tls_rpt": "" }, "advanced": { "ptr": "checkdomain01.storefront.g1i.one", "propagation": { "consistent": true, "results": [ { "provider": "Google", "server": "8.8.8.8", "result": [ "31.47.251.5" ], "time_ms": 159.35 }, { "provider": "Cloudflare", "server": "1.1.1.1", "result": [ "31.47.251.5" ], "time_ms": 158.06 }, { "provider": "Quad9", "server": "9.9.9.9", "result": [ "31.47.251.5" ], "time_ms": 162.94 }, { "provider": "OpenDNS", "server": "208.67.222.222", "result": [ "31.47.251.5" ], "time_ms": 142.67 }, { "provider": "AdGuard", "server": "94.140.14.14", "result": [ "31.47.251.5" ], "time_ms": 248.25 } ] } }, "ssl": { "available": true, "issuer": "Let's Encrypt", "subject": "checkdomain.de", "valid_from": "2026-07-25T22:32:05-05:00", "valid_to": "2026-10-23T22:32:04-05:00", "days_remaining": 73, "san": [ "checkdomain.de", "www.checkdomain.de" ], "protocol": "TLSv1.3", "cipher": "TLS_AES_256_GCM_SHA384" }, "http": { "url": "https://www.checkdomain.de/", "status": "HTTP/2 200 ", "http_version": "3", "headers": { "content-length": "224948", "location": "https://www.checkdomain.de/", "content-type": "text/html; charset=UTF-8", "vary": "Accept-Encoding", "date": "Tue, 11 Aug 2026 03:39:21 GMT", "strict-transport-security": "max-age=31536000", "x-content-type-options": "nosniff", "x-xss-protection": "1; mode=block", "x-frame-options": "SAMEORIGIN", "x-varnish": "390474087 380161593", "age": "710", "set-cookie": "stid=8.547; Path=/; Expires=Tue, 11 Aug 2026 03:56:11 GMT", "cache-control": "max-age=0, public, s-maxage=0", "accept-ranges": "bytes" }, "security_checks": { "strict-transport-security": true, "content-security-policy": false, "x-content-type-options": true, "x-frame-options": true, "referrer-policy": false, "permissions-policy": false, "cross-origin-opener-policy": false, "cross-origin-embedder-policy": false, "cross-origin-resource-policy": false }, "server": "", "powered_by": "" }, "webpage": { "url": "https://www.checkdomain.de/", "title": "Domain Check & Domains prüfen! Kostenlos!", "description": "Weltweiter Domain-Check ✓ über 750 Domainendungen ✓ Webhosting ✓ Wordpress ✓ Baukasten und kostenlose SSL-Zertifikate.", "success": true, "error": "", "status": 206 }, "network": { "31.47.251.5": { "success": false, "country": "", "region": "", "city": "", "asn": "", "organization": "", "isp": "" } }, "smtp": { "host": "m2.checkdomain.de", "ports": [ { "port": 25, "open": false, "time_ms": 116.5, "banner": "", "error": "Network is unreachable" }, { "port": 465, "open": false, "time_ms": 114.9, "banner": "", "error": "No connection" }, { "port": 587, "open": false, "time_ms": 229.5, "banner": "220 mx2.checkdomain.de ESMTP Exim 20260804.1000 Tue, 11 Aug 2026 05:51:14 +0200", "error": "No connection" } ] }, "visitor": { "ip": "216.73.217.62", "reverse": "", "country": "", "country_code": "", "region": "", "city": "", "latitude": null, "longitude": null, "isp": "", "organization": "", "asn": "", "timezone": "", "browser": "Other", "os": "Other", "language": "", "user_agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)", "is_bot": true, "cloudflare": false }, "analysis_time_ms": 79.04 }