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

surrey.ac.uk · 131.227.132.127:443

Verified

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

Subject
C=GB L=Guildford O=University of Surrey CN=*.surrey.ac.uk
Issuer
C=US O=DigiCert Inc CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Valid from
2026-09-09T00:00:00+00:00
Expires
2027-03-25T23:59:59+00:00
Days remaining
149
Serial (hex)
0943399465CA9D5A79710A2D200F1EAA
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.surrey.ac.uk, DNS:surrey.ac.uk

SHA-256 fingerprint

4B:54:98:8B:2F:18:4D:CF:C2:2A:70:56:1A:43:6A:9D:EF:36:3B:08:74:71:25:DE:7A:D2:73:71:6A:AE:40:24
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
77:1D:3E:9F:B4:AF:A7:78:72:DF:A3:08:E5:04:C1:D7:C1:79:6A:70
subjectAltName
DNS:*.surrey.ac.uk, DNS:surrey.ac.uk
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 9 12:36:02.185 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:4C:86:BE:18:EC:4D:BD:DA:75:E4:EC:4C: 0C:3E:95:83:E4:9A:F8:36:BE:0D:11:F8:7C:49:B1:9C: E6:52:52:2E:02:20:02:E6:77:86:7C:2C:2A:1E:45:75: ED:58:E8:81:73:1A:71:64:40:97:BC:44:24:10:B0:98: 36:AD:8C:E2:C0:9D 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 9 12:36:02.097 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:E0:F6:4D:F6:C4:32:02:D8:64:27:84: 6F:C0:AD:FB:D6:4F:23:08:6A:7F:8B:40:FF:C3:45:6C: 48:DD:3D:AC:F3:02:20:7E:BF:94:1E:AA:A3:F4:FC:4B: 1C:42:7C:7F:38:F0:1A:67:91:D8:E1:B9:85:CB:B5:1E: AC:25:C1:0E:C1:5F:6C 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 9 12:36:02.167 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:B5:C0:EA:D2:51:68:54:F0:47:0F:78: 86:84:23:E8:BA:6E:A4:5E:23:1B:2A:F3:0E:37:A7:0A: D2:33:39:F7:4C:02:20:3E:52:D5:B7:F3:D6:00:29:D3: B1:22:4A:98:00:16:7D:D3:92:85:C4:C1:CE:4A:F5:5B: 51:2B:AC:90:D7:E9:7A
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-10-27T08:34:21+00:00

Server-presented chain · 2 additional certificates

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
1614
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-----

Chain certificate 2

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2013-08-01T12:00:00+00:00
Expires
2038-01-15T12:00:00+00:00
Days remaining
4098
Serial (hex)
033AF1E6A711A9A0BB2864B11D09FAE5
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

CB:3C:CB:B7:60:31:E5:E0:13:8F:8D:D3:9A:23:F9:DE:47:FF:C3:5E:43:C1:14:4C:EA:27:D4:6A:5A:B1:CB:5F
Certificate extensions & PEM
basicConstraints
CA:TRUE
keyUsage
Digital Signature, Certificate Sign, CRL Sign
subjectKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
-----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 →