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

aston.ac.uk · 35.177.28.138:443

Verified

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

Subject
C=GB ST=West Midlands O=Aston University CN=aston.ac.uk
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA OV R36
Valid from
2026-07-28T00:00:00+00:00
Expires
2027-02-11T23:59:59+00:00
Days remaining
120
Serial (hex)
B20490936A62C6D82EFA97DCD02ADDE6
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:aston.ac.uk, DNS:www.aston.ac.uk

SHA-256 fingerprint

AA:A5:83:72:C9:60:2D:41:29:BD:9E:28:9A:34:FC:ED:E6:C2:22:31:C2:D4:84:3D:8D:58:FE:00:5C:7D:EF:30
Certificate extensions & PEM
authorityKeyIdentifier
E3:66:74:BB:70:68:8D:2C:5D:4E:0E:A6:4A:8F:9B:37:22:9C:82:92
subjectKeyIdentifier
2D:3F:56:D1:85:BD:21:11:BD:BC:C2:A3:39:FB:83:B9:9A:EC:41:CE
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.1.3.4 CPS: https://sectigo.com/CPS Policy: 2.23.140.1.2.2
crlDistributionPoints
Full Name: URI:http://crl.sectigo.com/SectigoPublicServerAuthenticationCAOVR36.crl
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationCAOVR36.crt OCSP - URI:http://ocsp.sectigo.com
ct_precert_scts
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 : Jul 28 09:02:36.976 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:A3:7A:19:6E:72:0B:84:A0:E6:08:57: 5F:CD:47:89:D1:50:8F:06:B5:3F:DE:AC:B4:E4:FE:4B: 25:9D:F4:70:51:02:21:00:FA:87:E7:17:9E:45:0C:50: 0F:5E:23:6A:55:0D:50:05:D6:59:D4:9E:06:73:07:51: 5C:22:65:78:15:EC:68:3D Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Jul 28 09:02:37.784 2026 GMT Extensions: 00:00:05:00:07:29:33:91 Signature : ecdsa-with-SHA256 30:44:02:20:44:9D:00:CF:CC:4E:C2:66:24:4C:B2:CC: AD:BB:B1:DC:70:54:19:D9:72:59:6D:26:52:F4:61:7B: 50:86:FE:20:02:20:02:8C:33:69:7A:DE:FD:3A:06:8D: 57:3B:53:0D:4F:25:C5:B4:F3:C1:A3:0D:5D:EA:6F:DA: 24:FF:63:2D:ED:57 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Jul 28 09:02:37.046 2026 GMT Extensions: 00:00:05:00:00:54:97:F9 Signature : ecdsa-with-SHA256 30:45:02:21:00:B4:5C:2B:FE:30:F7:4F:44:C0:38:A8: 05:AD:67:84:B1:53:F7:54:1F:23:B4:E8:06:BC:2D:E0: 56:AC:C6:84:61:02:20:50:15:42:86:06:9C:3E:83:E9: A6:1B:52:9E:51:70:A5:20:3D:79:56:6F:FD:EE:2F:06: 74:AD:56:D4:CE:F7:61
subjectAltName
DNS:aston.ac.uk, DNS:www.aston.ac.uk
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-14T02:11:09+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA OV R36
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root R46
Valid from
2021-03-22T00:00:00+00:00
Expires
2036-03-21T23:59:59+00:00
Days remaining
3446
Serial (hex)
2C1A3C76E943DDDDFF191B31890AED71
Signature
RSA-SHA384
Public key
RSA 3072

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

65:42:D1:76:BE:D5:0F:19:3C:0C:E2:97:AE:44:EC:D8:A0:A8:6B:EC:2E:DE:68:27:69:34:40:59:B4:E7:85:30
Certificate extensions & PEM
authorityKeyIdentifier
56:73:58:64:95:F9:92:1A:B0:12:2A:04:62:79:A1:40:15:88:21:49
subjectKeyIdentifier
E3:66:74:BB:70:68:8D:2C:5D:4E:0E:A6:4A:8F:9B:37:22:9C:82:92
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE, pathlen:0
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: X509v3 Any Policy Policy: 2.23.140.1.2.2
crlDistributionPoints
Full Name: URI:http://crl.sectigo.com/SectigoPublicServerAuthenticationRootR46.crl
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationRootR46.p7c OCSP - URI:http://ocsp.sectigo.com
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root R46
Issuer
C=GB ST=Greater Manchester L=Salford O=Comodo CA Limited CN=AAA Certificate Services
Valid from
2021-03-22T00:00:00+00:00
Expires
2028-12-31T23:59:59+00:00
Days remaining
809
Serial (hex)
E37CA2E9701E339C2F3FB0ED360FF90A
Signature
RSA-SHA384
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

CE:75:58:0B:C6:79:6D:3B:3E:A2:C3:E7:42:59:D0:D4:03:07:24:08:E9:60:C7:71:39:C2:FB:5A:3D:94:19:E4
Certificate extensions & PEM
authorityKeyIdentifier
A0:11:0A:23:3E:96:F1:07:EC:E2:AF:29:EF:82:A5:7F:D0:30:A4:B4
subjectKeyIdentifier
56:73:58:64:95:F9:92:1A:B0:12:2A:04:62:79:A1:40:15:88:21:49
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: X509v3 Any Policy
crlDistributionPoints
Full Name: URI:http://crl.comodoca.com/AAACertificateServices.crl
authorityInfoAccess
OCSP - URI:http://ocsp.comodoca.com
-----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

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