{"domain":"a4a.de","port":443,"address":"88.99.107.170","resolved_addresses":["88.99.107.170","2a01:4f8:10a:1d5c:8000::7"],"verified":true,"verification":"Certificate chain, hostname and dates verified using this server\u2019s CA store.","verification_error":null,"certificate":{"subject":{"CN":"a4a.de"},"issuer":{"C":"US","O":"Let's Encrypt","CN":"YR1"},"serial":"0563EBFB2DF9D391A6EF111049779C671962","version":3,"valid_from":"2026-09-24T16:41:58+00:00","valid_to":"2026-12-23T16:41:57+00:00","validity":"valid_period","days_remaining":58,"san":"DNS:a4a.de, DNS:www.a4a.de","signature":"RSA-SHA256","sha256":"E0:66:DC:B4:39:98:2D:E5:FF:38:C5:52:27:09:32:D3:10:D7:9C:1B:D7:0B:F4:95:7C:AE:0B:EA:73:55:04:43","key_type":"RSA","key_bits":2048,"curve":null,"extensions":{"keyUsage":"Digital Signature, Key Encipherment","extendedKeyUsage":"TLS Web Server Authentication","basicConstraints":"CA:FALSE","subjectKeyIdentifier":"9A:14:BA:A4:BA:77:C7:DC:4A:B2:83:90:AA:48:1F:80:C3:8C:43:89","authorityKeyIdentifier":"1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB","authorityInfoAccess":"CA Issuers - URI:http://yr1.i.lencr.org/","subjectAltName":"DNS:a4a.de, DNS:www.a4a.de","certificatePolicies":"Policy: 2.23.140.1.2.1","crlDistributionPoints":"Full Name:\n  URI:http://yr1.c.lencr.org/99.crl\n","ct_precert_scts":"Signed Certificate Timestamp:\n    Version   : v1 (0x0)\n    Log ID    : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB:\n                C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD\n    Timestamp : Sep 24 17:40:28.147 2026 GMT\n    Extensions: none\n    Signature : ecdsa-with-SHA256\n                30:45:02:20:7F:E3:9E:4F:58:01:73:D3:C0:40:EE:79:\n                CD:9E:1C:0D:08:A6:92:3F:24:61:B8:69:A9:BE:6C:04:\n                8F:2D:4D:F8:02:21:00:F5:AB:D8:43:63:3A:3A:7C:10:\n                4B:DE:13:10:4D:8B:56:D5:B0:F4:A0:A2:B9:15:51:F2:\n                7B:01:62:F0:90:A3:54\nSigned Certificate Timestamp:\n    Version   : v1 (0x0)\n    Log ID    : 46:AF:86:3D:3B:3E:E5:9F:A5:77:DE:A8:24:5D:36:B0:\n                D9:ED:22:A2:23:F4:61:77:41:22:94:52:EE:95:50:5F\n    Timestamp : Sep 24 17:40:28.335 2026 GMT\n    Extensions: 00:00:05:00:35:08:AE:AF\n    Signature : ecdsa-with-SHA256\n                30:45:02:21:00:AD:BC:CF:45:68:32:6A:B6:6E:01:89:\n                10:55:FA:5A:EA:8F:B3:55:F5:6F:5B:B5:CA:82:20:6D:\n                BC:BF:B6:34:E9:02:20:52:98:D3:A0:11:B7:31:4C:99:\n                FC:66:7A:8F:BC:68:AE:32:43:77:BA:AE:51:58:FC:10:\n                9B:42:A7:82:57:71:E3"},"pem":"-----BEGIN CERTIFICATE-----\nMIIE8jCCA9qgAwIBAgISBWPr+y3505Gm7xEQSXecZxliMA0GCSqGSIb3DQEBCwUA\nMDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQD\nEwNZUjEwHhcNMjYwOTI0MTY0MTU4WhcNMjYxMjIzMTY0MTU3WjARMQ8wDQYDVQQD\nEwZhNGEuZGUwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDGS8UQgIFH\ni5g9dtF4egpBuwI6VmQY7PIf4AE5SLrRHk5Utz6B4XghR3ztetX/sUQqWc2f3SWC\n/5cIqqWqwaFYiObdWC/woYjxVuFKtG6wH6FnSa/0brlPa4sBvjUDFtzkjiQ/tQJE\nj1SnQcYobQ9Q8pe+YeVPAGdztk/5ArXu+twikrhFxZ0IFq1VARQSaQabmNXumFh/\nH4d9P0AJzkIixzAs2zFm3QwyEZzvv/7KrLMUuO/HM06NDuG+gd1OmlSwl1fvDPlM\ndUeR45gTGs8gu9V8/oQebiwfwE5zrXc0YwGecp3Hk3PkL9IoN9QQuKwdHSj1Yrev\nFLkBE7bWdEJhAgMBAAGjggIgMIICHDAOBgNVHQ8BAf8EBAMCBaAwEwYDVR0lBAww\nCgYIKwYBBQUHAwEwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUmhS6pLp3x9xKsoOQ\nqkgfgMOMQ4kwHwYDVR0jBBgwFoAUHy81vkYUgs1Asa55LFV4+vfUaPswMwYIKwYB\nBQUHAQEEJzAlMCMGCCsGAQUFBzAChhdodHRwOi8veXIxLmkubGVuY3Iub3JnLzAd\nBgNVHREEFjAUggZhNGEuZGWCCnd3dy5hNGEuZGUwEwYDVR0gBAwwCjAIBgZngQwB\nAgEwLgYDVR0fBCcwJTAjoCGgH4YdaHR0cDovL3lyMS5jLmxlbmNyLm9yZy85OS5j\ncmwwggEMBgorBgEEAdZ5AgQCBIH9BIH6APgAdgDCMX5XRRmjRe5/ON6ykEHrx8Ih\nWiK/f9W1rXaa2Q5SzQAAAaDUgSNzAAAEAwBHMEUCIH/jnk9YAXPTwEDuec2eHA0I\nppI/JGG4aam+bASPLU34AiEA9avYQ2M6OnwQS94TEE2LVtWw9KCiuRVR8nsBYvCQ\no1QAfgBGr4Y9Oz7ln6V33qgkXTaw2e0ioiP0YXdBIpRS7pVQXwAAAaDUgSQvAAgA\nAAUANQiurwQDAEcwRQIhAK28z0VoMmq2bgGJEFX6WuqPs1X1b1u1yoIgbby/tjTp\nAiBSmNOgEbcxTJn8ZnqPvGiuMkN3uq5RWPwQm0Kngldx4zANBgkqhkiG9w0BAQsF\nAAOCAQEAlxgwkerlVfQEJMNfwpzw7a0e9sI1PuTeY+qlMy/HF1ts+7I2Li1Qqpwa\nbMNKavTlqy+EJveI//9ZrYDcICck+/fWA5ANTjosIOU0exCzdgmgFVB1jeAto5Ri\nfxDol4j/sz1NIeaK89m3BvOlgWnPYmsxr+QZEC7+lc62HNooOn3x1biLdfY+ImbG\nbAsQJuivvho3SHGXqltp0AStgNj9dHycsVJFaJersaQm+kQqmeC700wUmKXiEbDA\nYHmls69hs3azQgzainiHoSqWnL8LLoI0SDQjkUnVRWhGDf+KYU31Pd86B+xlumMJ\n0uvGQ45epnh0oDMvJM2FAuR5IfXOrg==\n-----END CERTIFICATE-----\n"},"chain":[{"subject":{"C":"US","O":"Let's Encrypt","CN":"YR1"},"issuer":{"C":"US","O":"ISRG","CN":"Root YR"},"serial":"A20253F15F2691C05DC1CE13B9BCCA4E","version":3,"valid_from":"2025-09-03T00:00:00+00:00","valid_to":"2028-09-02T23:59:59+00:00","validity":"valid_period","days_remaining":678,"san":"","signature":"RSA-SHA256","sha256":"13:94:96:34:D9:9C:D6:FD:6A:A8:0B:C0:34:FE:FA:CC:EB:19:69:FE:EF:98:65:86:71:3E:CD:BB:05:75:8D:3F","key_type":"RSA","key_bits":2048,"curve":null,"extensions":{"keyUsage":"Digital Signature, Certificate Sign, CRL Sign","extendedKeyUsage":"TLS Web Server Authentication","basicConstraints":"CA:TRUE, pathlen:0","subjectKeyIdentifier":"1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB","authorityKeyIdentifier":"DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94","authorityInfoAccess":"CA Issuers - 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URI:http://x1.i.lencr.org/","certificatePolicies":"Policy: 2.23.140.1.2.1","crlDistributionPoints":"Full Name:\n  URI:http://x1.c.lencr.org/\n"},"pem":"-----BEGIN CERTIFICATE-----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\nyDFx8r7i9vIJU5HS3moZLkYWAOilMaV9N56A9Bgb6dNcHkvg3NoaYA==\n-----END CERTIFICATE-----\n"}],"protocol":"TLSv1.3","cipher":"TLS_AES_128_GCM_SHA256","cipher_bits":128,"warnings":[],"attempts":[{"address":"88.99.107.170","verified":true,"error":null}],"checked_at":"2026-10-25T16:55:41+00:00","resolver":"Public DNS resolver","scope":"One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan."}