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

TLSv1.2

optage.co.jp · 60.56.6.142:443

Verified

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

Subject
C=JP ST=Osaka L=Osaka-shi O=OPTAGE INC. CN=optage.co.jp
Issuer
C=US O=DigiCert Inc CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Valid from
2026-09-11T00:00:00+00:00
Expires
2027-03-28T23:59:59+00:00
Days remaining
173
Serial (hex)
05468811CE177CD98814BF79C40451FD
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:optage.co.jp

SHA-256 fingerprint

FF:B8:0A:88:6B:5D:94:CE:40:1C:48:54:EA:C3:7A:C9:4F:DA:F3:92:5E:E5:EF:35:C7:7A:B7:C6:FB:C4:4C:94
Certificate extensions & PEM
authorityKeyIdentifier
74:85:80:C0:66:C7:DF:37:DE:CF:BD:29:37:AA:03:1D:BE:ED:CD:17
subjectKeyIdentifier
D6:09:B9:F1:50:8E:97:9F:DD:EA:83:40:93:31:92:5A:FA:C9:5B:16
subjectAltName
DNS:optage.co.jp
certificatePolicies
Policy: 2.23.140.1.2.2 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crl Full Name: URI:http://crl4.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crl
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com CA Issuers - URI:http://cacerts.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.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 11 01:32:12.286 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:0D:BA:0C:2D:5B:55:B9:D1:B9:C3:50:F2: AD:BA:BF:25:AB:7F:9D:DF:E2:A9:33:77:49:37:03:34: EE:75:BA:B4:02:21:00:E5:7A:DC:6C:DA:4D:9C:5E:40: C1:5D:DC:7D:0D:38:61:1F:A8:DD:E5:C8:8F:B0:AC:07: E4:3D:D1:9A:45:AE:C3 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 11 01:32:12.276 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:8D:BE:36:C8:17:55:2F:DC:30:B7:DB: 19:4E:DC:C6:2B:CA:84:D1:CF:BB:57:D2:01:CF:BA:57: 00:28:D3:AA:3D:02:20:50:D5:C8:93:66:DD:41:E9:4F: F2:8E:13:B1:A8:94:0A:9E:C9:91:E0:E7:F8:E7:CA:34: 09:61:92:FD:E8:D0:A9 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 11 01:32:12.327 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:96:17:D1:18:83:33:55:01:66:18:4A: 24:2D:FF:19:93:6C:8D:42:02:97:84:FD:07:27:2F:9B: 17:22:B3:2F:B0:02:20:5D:42:5F:59:47:7A:DC:A6:23: D7:CF:BE:0F:5E:58:BD:E8:34:73:93:40:13:14:96:F8: C7:72:18:DC:8D:4F:81
-----BEGIN CERTIFICATE-----
MIIGwTCCBamgAwIBAgIQBUaIEc4XfNmIFL95xARR/TANBgkqhkiG9w0BAQsFADBZ
MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMTMwMQYDVQQDEypE
aWdpQ2VydCBHbG9iYWwgRzIgVExTIFJTQSBTSEEyNTYgMjAyMCBDQTEwHhcNMjYw
OTExMDAwMDAwWhcNMjcwMzI4MjM1OTU5WjBeMQswCQYDVQQGEwJKUDEOMAwGA1UE
CBMFT3Nha2ExEjAQBgNVBAcTCU9zYWthLXNoaTEUMBIGA1UEChMLT1BUQUdFIElO
Qy4xFTATBgNVBAMTDG9wdGFnZS5jby5qcDCCASIwDQYJKoZIhvcNAQEBBQADggEP
ADCCAQoCggEBALy6mKY3AHP2ucQ3usLQJx5xMRsp9auCT16HteqsxnU5cM6bRBnF
h1DvD8NrH27o1dmkX4jbm0Ksu1dyauuxiSXKS89s5gFQ2czq35piMTRa09WKkzu7
QGDouo5aJe5qoez7bQkJKfg6fgkHmw78MBzLlUVp9IEXbXP1eiCUOYp8fe2wIGnB
MrQzx887vs4BwWdU8p/iYs6Ytla0Gq4SFC+HoN7fElIoB82V/js+bqkguS1OC6rL
IPBk7nsYUO0UUYea1URHwVkO7e6mG/B/ZYbKELgHU7IRMq3Fj6UQ7M438DBdj7OV
sPbF3QBk9tFYN5POm33gajOMfGrIThjMNMECAwEAAaOCA34wggN6MB8GA1UdIwQY
MBaAFHSFgMBmx9833s+9KTeqAx2+7c0XMB0GA1UdDgQWBBTWCbnxUI6Xn93qg0CT
MZJa+slbFjAXBgNVHREEEDAOggxvcHRhZ2UuY28uanAwPgYDVR0gBDcwNTAzBgZn
gQwBAgIwKTAnBggrBgEFBQcCARYbaHR0cDovL3d3dy5kaWdpY2VydC5jb20vQ1BT
MA4GA1UdDwEB/wQEAwIFoDATBgNVHSUEDDAKBggrBgEFBQcDATCBnwYDVR0fBIGX
MIGUMEigRqBEhkJodHRwOi8vY3JsMy5kaWdpY2VydC5jb20vRGlnaUNlcnRHbG9i
YWxHMlRMU1JTQVNIQTI1NjIwMjBDQTEtMS5jcmwwSKBGoESGQmh0dHA6Ly9jcmw0
LmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbEcyVExTUlNBU0hBMjU2MjAyMENB
MS0xLmNybDCBhwYIKwYBBQUHAQEEezB5MCQGCCsGAQUFBzABhhhodHRwOi8vb2Nz
cC5kaWdpY2VydC5jb20wUQYIKwYBBQUHMAKGRWh0dHA6Ly9jYWNlcnRzLmRpZ2lj
ZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbEcyVExTUlNBU0hBMjU2MjAyMENBMS0xLmNy
dDAMBgNVHRMBAf8EAjAAMIIBfgYKKwYBBAHWeQIEAgSCAW4EggFqAWgAdgBMY9yY
5Zwdq4j2Hoo93q6Pq0SjN3tfm5TD+6Gc/MG+JgAAAaCOF/5+AAAEAwBHMEUCIA26
DC1bVbnRucNQ8q26vyWrf53f4qkzd0k3AzTudbq0AiEA5XrcbNpNnF5AwV3cfQ04
YR+o3eXIj7CsB+Q90ZpFrsMAdgDW1Y2p0BdT82pKoMdXSQKv68fcLNOM2fdkyAyJ
GR6fAgAAAaCOF/50AAAEAwBHMEUCIQCNvjbIF1Uv3DC32xlO3MYryoTRz7tX0gHP
ulcAKNOqPQIgUNXIk2bdQelP8o4TsaiUCp7JkeDn+OfKNAlhkv3o0KkAdgBEwr0M
6RQOZKXJSgGTClqhuzWXDgDuERaJaCocRNe1ZgAAAaCOF/6nAAAEAwBHMEUCIQCW
F9EYgzNVAWYYSiQt/xmTbI1CApeE/QcnL5sXIrMvsAIgXUJfWUd63KYj18++D15Y
veg0c5NAExSW+MdyGNyNT4EwDQYJKoZIhvcNAQELBQADggEBAF4Wc6t6wfdVj38C
uo20jvJ2u/0T/XlPCHScUsOjxypbWjCjDWmcjdPvkZU5wmAV+sAaP+UvnV691S3K
LKJlZpD5Z6pk7hOXANp9GQxYWOp76qFFlvHiw7O59xyhRQtS4k8QJtbJXP7cK30y
NF9gOXMxnaOBgYTT3bgctS8O4MRd81CXIpnA7zvmt1qtkrFVYMAcdKRpLwZDt18V
FQH2dkmVjxGrCrBl/JqoMiEGiRF0LJ4yJM0NwFGYH4pMNQyD8iPUyFyMs/vKvsdr
XrYARe7KU1Y35ZKa62iuePeYtecE9Uv9V3TvHu/p0XucW4q+54UCVROYq4cKquTM
utZDIKs=
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-10-06T09:07:34+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2021-03-30T00:00:00+00:00
Expires
2031-03-29T23:59:59+00:00
Days remaining
1635
Serial (hex)
0CF5BD062B5602F47AB8502C23CCF066
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

C8:02:5F:9F:C6:5F:DF:C9:5B:3C:A8:CC:78:67:B9:A5:87:B5:27:79:73:95:79:17:46:3F:C8:13:D0:B6:25:A9
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
74:85:80:C0:66:C7:DF:37:DE:CF:BD:29:37:AA:03:1D:BE:ED:CD:17
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
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com CA Issuers - URI:http://cacerts.digicert.com/DigiCertGlobalRootG2.crt
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: 2.16.840.1.114412.2.1 Policy: 2.23.140.1.1 Policy: 2.23.140.1.2.1 Policy: 2.23.140.1.2.2 Policy: 2.23.140.1.2.3
-----BEGIN CERTIFICATE-----
MIIEyDCCA7CgAwIBAgIQDPW9BitWAvR6uFAsI8zwZjANBgkqhkiG9w0BAQsFADBh
MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3
d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBH
MjAeFw0yMTAzMzAwMDAwMDBaFw0zMTAzMjkyMzU5NTlaMFkxCzAJBgNVBAYTAlVT
MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxMzAxBgNVBAMTKkRpZ2lDZXJ0IEdsb2Jh
bCBHMiBUTFMgUlNBIFNIQTI1NiAyMDIwIENBMTCCASIwDQYJKoZIhvcNAQEBBQAD
ggEPADCCAQoCggEBAMz3EGJPprtjb+2QUlbFbSd7ehJWivH0+dbn4Y+9lavyYEEV
cNsSAPonCrVXOFt9slGTcZUOakGUWzUb+nv6u8W+JDD+Vu/E832X4xT1FE3LpxDy
FuqrIvAxIhFhaZAmunjZlx/jfWardUSVc8is/+9dCopZQ+GssjoP80j812s3wWPc
3kbW20X+fSP9kOhRBx5Ro1/tSUZUfyyIxfQTnJcVPAPooTncaQwywa8WV0yUR0J8
osicfebUTVSvQpmowQTCd5zWSOTOEeAqgJnwQ3DPP3Zr0UxJqyRewg2C/Uaoq2yT
zGJSQnWS+Jr6Xl6ysGHlHx+5fwmY6D36g39HaaECAwEAAaOCAYIwggF+MBIGA1Ud
EwEB/wQIMAYBAf8CAQAwHQYDVR0OBBYEFHSFgMBmx9833s+9KTeqAx2+7c0XMB8G
A1UdIwQYMBaAFE4iVCAYlebjbuYP+vq5Eu0GF485MA4GA1UdDwEB/wQEAwIBhjAd
BgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwdgYIKwYBBQUHAQEEajBoMCQG
CCsGAQUFBzABhhhodHRwOi8vb2NzcC5kaWdpY2VydC5jb20wQAYIKwYBBQUHMAKG
NGh0dHA6Ly9jYWNlcnRzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEdsb2JhbFJvb3RH
Mi5jcnQwQgYDVR0fBDswOTA3oDWgM4YxaHR0cDovL2NybDMuZGlnaWNlcnQuY29t
L0RpZ2lDZXJ0R2xvYmFsUm9vdEcyLmNybDA9BgNVHSAENjA0MAsGCWCGSAGG/WwC
ATAHBgVngQwBATAIBgZngQwBAgEwCAYGZ4EMAQICMAgGBmeBDAECAzANBgkqhkiG
9w0BAQsFAAOCAQEAkPFwyyiXaZd8dP3A+iZ7U6utzWX9upwGnIrXWkOH7U1MVl+t
wcW1BSAuWdH/SvWgKtiwla3JLko716f2b4gp/DA/JIS7w7d7kwcsr4drdjPtAFVS
slme5LnQ89/nD/7d+MS5EHKBCQRfz5eeLjJ1js+aWNJXMX43AYGyZm0pGrFmCW3R
bpD0ufovARTFXFZkAdl9h6g4U5+LXUZtXMYnhIHUfoyMo5tS58aI7Dd8KvvwVVo4
chDYABPPTHPbqjc1qCmBaZx2vN4Ye5DUys/vZwP9BFohFrH/6j/f3IL16/RZkiMN
JCqVJUzKoZHm1Lesh3Sz8W2jmdv51b2EQJ8HmA==
-----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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