DNS
THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.3

afranet.com · 80.75.12.17:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed

Certificate verification failed

Subject
CN=*.afranet.com
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2026-02-16T10:31:08+00:00
Expires
2027-02-16T10:31:07+00:00
Days remaining
131
Serial (hex)
561F157B3B4D3985AB3036422EBA42C3
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.afranet.com, DNS:afranet.com

SHA-256 fingerprint

89:A4:D6:60:25:3E:D9:E8:C9:0F:7B:AD:87:C3:B4:DA:B4:36:64:5C:54:80:29:37:99:DF:1F:15:F3:1F:0C:E7
Certificate extensions & PEM
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://certumdvtlsg2r39ca.crl.certum.pl/certumdvtlsg2r39ca.crl
authorityInfoAccess
OCSP - URI:http://certumdvtlsg2r39ca.ocsp-certum.com CA Issuers - URI:http://certumdvtlsg2r39ca.repository.certum.pl/certumdvtlsg2r39ca.cer
authorityKeyIdentifier
33:A8:77:B7:01:38:6F:5F:1F:24:24:A2:1E:6C:14:E3:6E:22:03:DF
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.2.616.1.113527.2.101.1
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
keyUsage
Digital Signature, Key Encipherment
subjectAltName
DNS:*.afranet.com, DNS:afranet.com
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 60:4C:9A:AF:7A:7F:77:5F:01:D4:06:FC:92:0D:C8:99: EB:0B:1C:7D:F8:C9:52:1B:FA:FA:17:77:3B:97:8B:C9 Timestamp : Feb 16 10:31:16.840 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:29:DC:81:2A:CF:08:FE:27:4A:92:77:A0: B6:4F:13:80:9A:58:EB:12:8D:3A:C8:42:15:E2:64:FA: 7C:91:3B:3F:02:21:00:8C:27:F4:17:4C:70:10:F5:9E: C9:FD:4F:4A:CE:2E:F3:3B:19:11:F7:16:F6:FE:00:75: C3:E5:31:EF:92:1D:4A Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Feb 16 10:31:17.034 2026 GMT Extensions: 00:00:05:00:00:28:33:8E Signature : ecdsa-with-SHA256 30:45:02:20:7F:7B:AD:5D:0E:42:07:7B:46:F5:D4:91: 26:05:70:C4:40:23:6C:0F:0C:72:C5:8E:7D:04:A2:85: 8C:0D:3D:23:02:21:00:85:6F:82:9D:AB:20:DA:FE:CB: DC:03:22:05:F6:26:52:ED:92:B9:AF:9A:A6:E2:A0:97: 96:98:5C:E3:87:ED:D4 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Feb 16 10:31:17.003 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:C4:6E:BB:37:AD:64:24:3B:3F:FA:9A: 83:6B:93:C4:59:45:DB:A1:10:C5:39:AE:64:5D:A6:71: 40:97:20:2D:EF:02:21:00:AA:46:97:90:9B:D9:1A:64: 5B:8B:ED:81:E5:7D:64:79:AB:FC:11:FD:B2:94:4C:2D: 15:99:64:82:2B:6B:B6:C1
-----BEGIN CERTIFICATE-----
MIIHGzCCBQOgAwIBAgIQVh8VeztNOYWrMDZCLrpCwzANBgkqhkiG9w0BAQsFADBS
MQswCQYDVQQGEwJQTDEhMB8GA1UECgwYQXNzZWNvIERhdGEgU3lzdGVtcyBTLkEu
MSAwHgYDVQQDDBdDZXJ0dW0gRFYgVExTIEcyIFIzOSBDQTAeFw0yNjAyMTYxMDMx
MDhaFw0yNzAyMTYxMDMxMDdaMBgxFjAUBgNVBAMMDSouYWZyYW5ldC5jb20wggEi
MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDQGA3EbBI2rYuELcxZbkU9eDB3
6QICUr+JLRCxeMQldbnvZLA6UZW88g5SZ0lr5KTyDFGTQhJ7nbP8LiPuo8/a+X2Y
SC4I2yBpX2kdOAWxCFix8aKGHoy5vvBqsDFUYL6Hy8qNZjmo5/hUMNXFLgcnAkoZ
SbQ/E/BEfBqNJC/6v6MaWliQYzhp+JCu4lVX4NyoE2LgwOcl7kC7AYJQcS6ggPF7
lKDef+N/m9lePN204KCIg7g3LvkByDb5KKwjZL1llb5pyQ5OIcNTUaT7bmFstPVx
EsCDexEAbCkA9sU9WehiP1LZwoRMvta0Mn5hIBJjCDov76+Nuigk5gXsycGBAgMB
AAGjggMlMIIDITAMBgNVHRMBAf8EAjAAME8GA1UdHwRIMEYwRKBCoECGPmh0dHA6
Ly9jZXJ0dW1kdnRsc2cycjM5Y2EuY3JsLmNlcnR1bS5wbC9jZXJ0dW1kdnRsc2cy
cjM5Y2EuY3JsMIGaBggrBgEFBQcBAQSBjTCBijA1BggrBgEFBQcwAYYpaHR0cDov
L2NlcnR1bWR2dGxzZzJyMzljYS5vY3NwLWNlcnR1bS5jb20wUQYIKwYBBQUHMAKG
RWh0dHA6Ly9jZXJ0dW1kdnRsc2cycjM5Y2EucmVwb3NpdG9yeS5jZXJ0dW0ucGwv
Y2VydHVtZHZ0bHNnMnIzOWNhLmNlcjAfBgNVHSMEGDAWgBQzqHe3AThvXx8kJKIe
bBTjbiID3zAhBgNVHSAEGjAYMAgGBmeBDAECATAMBgoqhGgBhvZ3AmUBMB0GA1Ud
JQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAOBgNVHQ8BAf8EBAMCBaAwJQYDVR0R
BB4wHIINKi5hZnJhbmV0LmNvbYILYWZyYW5ldC5jb20wggGHBgorBgEEAdZ5AgQC
BIIBdwSCAXMBcQB2AGBMmq96f3dfAdQG/JINyJnrCxx9+MlSG/r6F3c7l4vJAAAB
nGYBJGgAAAQDAEcwRQIgKdyBKs8I/idKknegtk8TgJpY6xKNOshCFeJk+nyROz8C
IQCMJ/QXTHAQ9Z7J/U9Kzi7zOxkR9xb2/gB1w+Ux75IdSgB+AFlubDOGlLJZcqJW
yKDo3ZBKdugIPdqHOwEIOCgUPO5ZAAABnGYBJSoACAAABQAAKDOOBAMARzBFAiB/
e61dDkIHe0b11JEmBXDEQCNsDwxyxY59BKKFjA09IwIhAIVvgp2rINr+y9wDIgX2
JlLtkrmvmqbioJeWmFzjh+3UAHcAHJ9oLOn68EVpUPgbloqH3dsyENhM5siy44JS
SsTPWZ8AAAGcZgElCwAABAMASDBGAiEAxG67N61kJDs/+pqDa5PEWUXboRDFOa5k
XaZxQJcgLe8CIQCqRpeQm9kaZFuL7YHlfWR5q/wR/bKUTC0VmWSCK2u2wTANBgkq
hkiG9w0BAQsFAAOCAgEAGIIFpuozGEM78To5nRMaqp6BGIyvr8YoRjFEg+58sa9l
PCiW7Ttliut2ZX38e8Sa6kBjTqB3gNq6Mekyuowmi98904dJQMp9OOhSwC2JdTQ0
bbylBiuP01XBdMXCCXeJ3aXU23auvuaW/qzP4Cja9KRSNyoyqSzs7kslxlinvCur
axrVSsGa7OxrsWSqkSJnY2rRI59g3lTs8XABU6CxyWehF/hFTBP8RMQ3N+HEg3Q1
DujaYHaZ+uW/rP+80Z5og4nAPoGA/eVwBgIMgsT5aFBfJgTxUbvCmACB08F1ah6p
oqyRoPe8ZfCX1EILGGGQtEtWEWdScRljF7mTW3UcUMonTZKdJL1QemxkKmTC8MUs
DmUVdaZ8nTesbjXyUjMCr9zK9AHjMkdsWRz7E2aPF7B+WBUsasuwbe5dkRyY0cY3
FooGdjhNaYBI06IqwdT+AuylM9eIVArKZ3zanzg221B8WxFxS6Beday/jAJeWepA
OFuWMW3lcdLFbOaX4PpbU1Q7SF3IYDmJPB2OXWztoPjvrGZsSyCI6Ha1pon6sfpv
K2r43RiuVVOJBl8PyaVabFmCJUqm1cKHlQAVYDDo441PxQqOpsu2JXyIJP4/jysn
cginPsOv7oBdHCy91476o9ApWKJgI1hJ4/aHcUqzzOgEKtGlQRsoT4q+aUNM45k=
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-08T06:17:46+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=PL O=Unizeto Technologies S.A. OU=Certum Certification Authority CN=Certum Domain Validation CA SHA2
Issuer
C=PL O=Unizeto Technologies S.A. OU=Certum Certification Authority CN=Certum Trusted Network CA
Valid from
2014-09-11T12:00:00+00:00
Expires
2027-06-09T10:46:39+00:00
Days remaining
244
Serial (hex)
26DDD22B46C9C44D5A694D39807E72AD
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

12:9F:B5:DE:50:1E:24:04:1C:D1:4A:81:07:5F:D1:CD:E2:57:40:8D:4A:35:3E:63:69:12:E3:8B:DD:A2:D3:FB
Certificate extensions & PEM
basicConstraints
CA:TRUE
subjectKeyIdentifier
E5:31:AD:BF:3A:11:96:F4:83:BC:50:3C:D4:B7:90:9B:90:EE:DE:25
authorityKeyIdentifier
08:76:CD:CB:07:FF:24:F6:C5:CD:ED:BB:90:BC:E2:84:37:46:75:F7
keyUsage
Certificate Sign, CRL Sign
crlDistributionPoints
Full Name: URI:http://crl.certum.pl/ctnca.crl
authorityInfoAccess
OCSP - URI:http://subca.ocsp-certum.com CA Issuers - URI:http://repository.certum.pl/ctnca.cer
certificatePolicies
Policy: X509v3 Any Policy CPS: http://www.certum.pl/CPS
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

View certificate JSON

Registration / WHOIS →DNS records →