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

TLS

grnt.ne.jp · 115.187.64.38:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A00018A:SSL routines::dh key too small

Certificate verification failed

Subject
CN=www.grnt.ne.jp
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=RapidSSL TLS RSA CA G1
Valid from
2026-09-14T00:00:00+00:00
Expires
2027-03-31T23:59:59+00:00
Days remaining
169
Serial (hex)
049F6EDA8D68D7FBB18AD506C1E472BE
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:www.grnt.ne.jp, DNS:grnt.ne.jp

SHA-256 fingerprint

9F:0F:3C:99:DD:03:65:2B:1A:D5:C9:BF:9C:8F:F8:48:4F:89:01:4B:80:7A:98:C4:A7:C6:F3:59:DA:F6:17:49
Certificate extensions & PEM
authorityKeyIdentifier
0C:DB:6C:82:49:0F:4A:67:0A:B8:14:EE:7A:C4:48:52:88:EB:56:38
subjectKeyIdentifier
3C:D8:9C:DE:EE:42:5B:37:CB:36:96:E4:69:34:CD:58:04:3D:E8:7E
subjectAltName
DNS:www.grnt.ne.jp, DNS:grnt.ne.jp
certificatePolicies
Policy: 2.23.140.1.2.1 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://cdp.rapidssl.com/RapidSSLTLSRSACAG1.crl
authorityInfoAccess
OCSP - URI:http://status.rapidssl.com CA Issuers - URI:http://cacerts.rapidssl.com/RapidSSLTLSRSACAG1.crt
basicConstraints
CA:FALSE
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F: AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26 Timestamp : Sep 14 02:47:24.121 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:45:7E:5D:AA:D5:60:C9:FB:07:42:EF:68: 0B:07:6B:A9:4E:FF:7B:17:E2:B9:76:35:63:1F:04:7E: 53:83:D0:23:02:21:00:AD:12:C4:C1:B3:67:0C:DB:6E: 3D:F5:C7:2C:FC:F0:04:7E:45:16:79:B6:02:41:FB:2B: 1F:96:33:9A:10:23:F0 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 : Sep 14 02:47:24.088 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:E9:BE:20:43:3A:4B:5C:88:BA:9E:A0: 2E:EE:5B:59:68:99:12:E5:3B:CE:9A:E9:28:D4:D5:F5: C7:95:44:B1:2E:02:20:3E:23:BD:5F:46:88:87:6A:C4: 77:33:90:9C:73:B6:A0:B8:F0:3B:35:96:62:7C:07:89: 08:35:C2:64:01:DF:90 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 : Sep 14 02:47:24.175 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:C6:63:57:28:53:1C:35:1D:1E:76:E5: FC:F0:AD:2E:E0:A4:A4:80:2F:09:12:4A:AF:6C:8E:47: 13:93:EF:B4:98:02:20:5C:35:81:BB:34:F4:14:42:CD: E9:EE:50:4F:C1:25:64:14:F0:19:3F:03:12:72:26:80: 07:09:90:CC:96:CF:58
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: Unavailable · Checked 2026-10-13T19:35:04+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=RapidSSL TLS RSA CA G1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2017-11-02T12:24:33+00:00
Expires
2027-11-02T12:24:33+00:00
Days remaining
384
Serial (hex)
0B259422CED9812A15A04E99528A0EFA
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

44:22:E9:63:EE:53:CD:58:CC:9F:85:CD:40:BF:5F:FE:C0:09:5F:DF:1A:15:45:35:66:1C:1C:06:BC:AD:C6:9B
Certificate extensions & PEM
subjectKeyIdentifier
0C:DB:6C:82:49:0F:4A:67:0A:B8:14:EE:7A:C4:48:52:88:EB:56:38
authorityKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:TRUE, pathlen:0
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: 2.16.840.1.114412.1.1 CPS: https://www.digicert.com/CPS Policy: 2.16.840.1.114412.1.2 Policy: 2.23.140.1.2.1 Policy: 2.23.140.1.2.2
-----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 →