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

rerf.or.jp · 150.60.176.189:443

Verified

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

Subject
C=JP ST=HIROSHIMA L=HIROSHIMA-SHI O=Radiation Effects Research Foundation CN=www.rerf.or.jp
Issuer
C=US O=DigiCert Inc CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Valid from
2026-06-02T00:00:00+00:00
Expires
2026-12-17T23:59:59+00:00
Days remaining
74
Serial (hex)
07C88915839447BB4BA05425C811BF4A
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:www.rerf.or.jp, DNS:rerf.or.jp

SHA-256 fingerprint

BE:2E:5E:81:B4:7D:84:6C:47:4B:83:63:53:04:9D:5A:A6:60:3E:F1:02:89:24:7C:A3:A5:ED:0F:EA:13:C0:4D
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
13:AC:C8:78:E8:11:FB:20:F4:42:5D:12:8C:6C:88:F0:FA:10:B9:01
subjectAltName
DNS:www.rerf.or.jp, DNS:rerf.or.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 : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Jun 2 06:36:26.311 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:F2:B0:00:C3:BD:0D:88:5E:D0:42:80: 17:8F:56:E0:82:AA:E2:B9:F7:38:8C:FF:31:9C:90:B9: E2:16:76:E7:FE:02:20:1E:9D:00:7D:E0:4C:39:A9:1F: 8D:6C:F1:10:2C:C0:63:0C:1F:E2:5A:9D:F6:85:DC:80: 24:B5:AF:D4:5F:CC:29 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Jun 2 06:36:26.351 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:DB:3D:31:5B:2A:B1:BE:A3:48:5F:D6: 0D:BD:9D:CA:A2:24:C2:D8:F8:9B:34:BD:5A:0E:BC:0E: 0D:EB:4E:77:58:02:20:72:A9:3A:69:52:9F:6D:19:2C: DE:2B:D3:F8:AA:32:93:D5:8B:4D:99:DD:AC:7E:C3:B6: 70:3D:5E:44:3D:4D:B1 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Jun 2 06:36:26.351 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:82:28:12:55:BF:BB:A8:5E:07:79:74: 54:D6:A8:04:E2:CB:59:CC:66:35:75:90:23:FB:D4:DB: A9:8C:5B:62:1A:02:20:0E:11:D6:69:12:84:BB:00:37: 5B:73:0B:F8:BA:13:4A:11:E0:44:B1:80:31:73:2C:1B: 6C:AC:94:DE:90:61:7D
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-04T11:20:05+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
1637
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-----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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 →