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

caict.ac.cn · 219.239.97.52:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed

Certificate verification failed

Subject
CN=.*.caict.ac.cn
Issuer
CN=ProtectionSystem CA
Valid from
2026-03-26T02:11:37+00:00
Expires
2036-03-23T02:11:37+00:00
Days remaining
3427
Serial (hex)
019D27E9596B
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:.*.caict.ac.cn

SHA-256 fingerprint

67:BE:10:17:E4:5C:92:4A:4E:6C:59:AD:A6:2A:77:91:E7:E7:D3:08:7E:88:8A:D5:C2:6F:65:95:AF:95:1D:39
Certificate extensions & PEM
subjectAltName
DNS:.*.caict.ac.cn
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-03T16:26:11+00:00

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

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