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

ico.de · 83.141.56.118:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
CN=*.ico.de
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2026-10-05T14:36:40+00:00
Expires
2027-04-22T14:36:39+00:00
Days remaining
185
Serial (hex)
289B8FEB243A048C39810AAB13141AEC
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.ico.de, DNS:ico.de

SHA-256 fingerprint

28:B7:30:B6:13:9F:1D:6F:E5:B6:DA:7D:1F:F5:5C:97:6F:72:75:19:23:FD:56:54:BE:04:3A:BF:E6:75:08:3B
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:*.ico.de, DNS:ico.de
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:C2:BD:0C:E9:14:0E:64:A5:C9:4A:01:93:0A:5A:A1: BB:35:97:0E:00:EE:11:16:89:68:2A:1C:44:D7:B5:66 Timestamp : Oct 5 14:36:41.878 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:24:5E:9C:FF:2E:BF:21:5C:A2:B2:56:C3: F5:85:DA:83:A6:17:26:50:5A:F2:BD:D0:94:24:77:A1: 99:6E:1E:33:02:20:52:61:BF:6B:1E:0D:AB:2D:12:C8: AF:41:63:59:B3:DD:0A:44:39:04:BD:C5:67:55:A5:04: DF:C1:F8:08:CC:98 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 : Oct 5 14:36:42.079 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:07:AF:45:2C:53:FF:0D:BB:EA:CA:A6:A0: D1:7E:80:B3:E8:71:41:AF:E4:A3:70:C0:E6:7D:E9:0A: F0:A0:00:7E:02:20:36:57:79:B7:F4:F5:5B:D0:BF:05: 90:BA:F6:8A:E8:CE:1A:F7:45:D9:EF:3E:DA:3D:B5:08: B3:6D:FD:91:69:36 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D6:D5:8D:A9:D0:17:53:F3:6A:4A:A0:C7:57:49:02:AF: EB:C7:DC:2C:D3:8C:D9:F7:64:C8:0C:89:19:1E:9F:02 Timestamp : Oct 5 14:36:42.403 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:3E:46:C8:E6:31:3D:F4:90:AE:1D:A6:44: FB:5A:D4:27:7A:3C:3A:79:8A:07:D2:6C:F7:1F:29:FD: 2E:02:BE:D6:02:21:00:CA:2C:3E:48:74:B9:8B:AF:C3: A3:03:A2:98:69:48:15:39:69:57:66:AA:04:F9:C6:86: 5E:BB:6D:42:69:9C:1E
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-19T07:23:00+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Issuer
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum Trusted Root CA
Valid from
2024-06-18T07:41:22+00:00
Expires
2039-06-05T07:41:22+00:00
Days remaining
4612
Serial (hex)
A82DD9E5DCAFDF13205E70043E6B95A8
Signature
RSA-SHA512
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

83:C0:A5:A7:68:44:C8:40:DF:AF:82:0F:FD:02:AD:F6:57:3A:26:82:3E:F6:AF:75:8A:33:84:A0:AC:04:40:83
Certificate extensions & PEM
authorityInfoAccess
CA Issuers - URI:http://subca.repository.certum.pl/ctrca.cer OCSP - URI:http://subca.ocsp-certum.com
authorityKeyIdentifier
8C:FB:1C:75:BC:02:D3:9F:4E:2E:48:D9:F9:60:54:AA:C4:B3:4F:FA
basicConstraints
CA:TRUE, pathlen:0
crlDistributionPoints
Full Name: URI:http://subca.crl.certum.pl/ctrca.crl
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
keyUsage
Certificate Sign, CRL Sign
certificatePolicies
Policy: X509v3 Any Policy
subjectKeyIdentifier
33:A8:77:B7:01:38:6F:5F:1F:24:24:A2:1E:6C:14:E3:6E:22:03:DF
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum Trusted Root CA
Issuer
C=PL O=Unizeto Technologies S.A. OU=Certum Certification Authority CN=Certum Trusted Network CA
Valid from
2023-09-19T10:00:00+00:00
Expires
2028-09-19T10:00:00+00:00
Days remaining
701
Serial (hex)
D8E0744B5824919FBD08847DF72020FA
Signature
RSA-SHA512
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

FB:13:89:0C:7A:B1:4F:F7:B9:4B:27:14:50:3E:31:12:3B:FD:D3:40:FC:4D:97:97:43:16:6E:04:69:B4:7A:88
Certificate extensions & PEM
basicConstraints
CA:TRUE
subjectKeyIdentifier
8C:FB:1C:75:BC:02:D3:9F:4E:2E:48:D9:F9:60:54:AA:C4:B3:4F:FA
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: https://www.certum.pl/CPS
-----BEGIN CERTIFICATE-----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vjC9gFC/fLXOAPYMYdnnJAPg4wGBDr3YhTSIvbI2qHtcCOVEgIxv+C/VIcodHND7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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

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