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

iij.ad.jp · 202.232.2.191:443

Verified

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

Subject
C=JP ST=Tokyo L=Chiyoda-ku O=Internet Initiative Japan Inc. CN=www.iij.ad.jp
Issuer
C=JP O=Cybertrust Japan Co., Ltd. CN=Cybertrust Japan SureServer CA G4
Valid from
2026-02-04T09:15:36+00:00
Expires
2027-02-28T14:59:00+00:00
Days remaining
111
Serial (hex)
06DD096884B53FB4C5B78090C282742E8F4F6188
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:www.iij.ad.jp, DNS:iij.ad.jp

SHA-256 fingerprint

88:78:49:49:5C:91:EC:F2:1D:FA:17:12:BA:3B:34:DB:6D:B3:B8:6C:A8:4D:A5:0C:BC:F3:D3:36:74:19:B4:38
Certificate extensions & PEM
basicConstraints
CA:FALSE
certificatePolicies
Policy: 2.23.140.1.2.2 Policy: 1.2.392.200081.1.23.1 CPS: https://www.cybertrust.ne.jp/ssl/repository/index.html
subjectAltName
DNS:www.iij.ad.jp, DNS:iij.ad.jp
authorityInfoAccess
OCSP - URI:http://ssocsp.cybertrust.ne.jp/OcspServer CA Issuers - URI:http://crl.cybertrust.ne.jp/SureServer/ovcag4/ovcag4.crt
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
authorityKeyIdentifier
62:A7:D2:DA:DE:85:B6:92:F1:85:BC:F6:E8:95:9D:75:A0:FA:4E:1F
crlDistributionPoints
Full Name: URI:http://crl.cybertrust.ne.jp/SureServer/ovcag4/cdp.crl
subjectKeyIdentifier
8A:97:7C:F0:B3:CE:F7:0E:BC:06:D3:8F:AB:41:31:C2:9A:AF:6F:B1
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 4 09:43:13.449 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:6C:68:4C:93:A3:8E:AB:59:3B:7B:22:41: EF:67:FA:BD:0E:80:7B:66:1A:DD:03:BC:3F:8C:06:4C: 7A:4A:26:6F:02:21:00:D0:0F:00:93:03:41:CB:BE:F1: 00:A1:97:CC:09:D5:8A:69:1B:3A:FA:97:DB:C8:BC:B6: 81:F6:2A:03:F1:F2:AB 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 4 09:43:14.449 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:56:42:22:CA:A1:61:E8:EF:1E:84:FA:C8: 2B:B6:D6:37:D4:92:36:2E:AB:71:42:B7:54:CF:BE:1E: 72:DF:98:60:02:20:48:0B:29:FC:75:2E:8B:61:FF:71: 54:2D:BF:FA:A0:2C:CD:DD:45:A1:51:5B:94:04:E7:1B: 40:FF:B5:27:96:06 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 : Feb 4 09:43:17.252 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:56:5F:90:62:00:71:FF:70:5D:1F:DC:08: D5:01:6A:13:3E:B5:94:9D:98:51:D0:E0:6B:BB:16:55: 35:E6:F1:78:02:20:5F:6E:72:95:54:12:7A:D7:1E:6C: E8:B6:07:ED:4D:E1:87:99:59:3E:5F:D9:AF:3B:17:28: 6D:30:13:17:9A:AD
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-11-09T07:24:53+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=JP O=Cybertrust Japan Co., Ltd. CN=Cybertrust Japan SureServer CA G4
Issuer
C=JP O=SECOM Trust Systems CO.,LTD. OU=Security Communication RootCA2
Valid from
2023-12-13T05:57:30+00:00
Expires
2029-05-29T05:00:39+00:00
Days remaining
931
Serial (hex)
22B9B1A074641857F7A01332DB42B9EC
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

83:46:92:2C:B8:73:0B:B6:AE:71:AB:03:BF:C4:24:62:F4:16:04:23:D9:07:9B:E6:43:85:62:1A:C5:87:76:72
Certificate extensions & PEM
subjectKeyIdentifier
62:A7:D2:DA:DE:85:B6:92:F1:85:BC:F6:E8:95:9D:75:A0:FA:4E:1F
authorityKeyIdentifier
0A:85:A9:77:65:05:98:7C:40:81:F8:0F:97:2C:38:F1:0A:EC:3C:CF
basicConstraints
CA:TRUE, pathlen:0
keyUsage
Certificate Sign, CRL Sign
crlDistributionPoints
Full Name: URI:http://repository.secomtrust.net/SC-Root2/SCRoot2CRL.crl
certificatePolicies
Policy: 2.23.140.1.2.2 Policy: 1.2.392.200091.100.901.4 CPS: https://repository.secomtrust.net/SC-Root2/
authorityInfoAccess
OCSP - URI:http://scrootca2.ocsp.secomtrust.net CA Issuers - URI:http://repository.secomtrust.net/SC-Root2/SCRoot2ca.cer
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
-----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.

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