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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

open.edu.au · 54.253.31.99:443

Verified

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

Subject
CN=open.edu.au
Issuer
C=US O=Amazon CN=Amazon RSA 2048 M04
Valid from
2026-09-17T00:00:00+00:00
Expires
2027-04-02T23:59:59+00:00
Days remaining
192
Serial (hex)
0EF679292558055C3342ED7F49EFB3CE
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:open.edu.au

SHA-256 fingerprint

C6:D6:64:CC:BC:F0:FA:15:86:07:A0:4E:29:8B:8A:30:70:7F:86:99:F4:9F:A2:93:A0:F1:9E:5B:FB:94:9A:67
Certificate extensions & PEM
authorityKeyIdentifier
1F:52:92:61:56:82:54:7F:81:66:D8:1D:3D:0A:AA:32:5C:87:DD:08
subjectKeyIdentifier
07:E6:5A:79:B0:0F:D4:40:22:F0:D5:50:84:AA:37:05:C6:0C:78:25
subjectAltName
DNS:open.edu.au
certificatePolicies
Policy: 2.23.140.1.2.1
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.r2m04.amazontrust.com/r2m04.crl
authorityInfoAccess
OCSP - URI:http://ocsp.r2m04.amazontrust.com CA Issuers - URI:http://crt.r2m04.amazontrust.com/r2m04.cer
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 17 00:04:51.315 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:DA:C2:7C:62:91:81:9F:81:C2:0C:F0: F7:CF:9E:E6:8C:5C:92:4F:C8:BA:82:7C:A1:BB:EC:75: 5A:95:5A:22:4E:02:21:00:F3:A3:8C:B9:9D:D6:EE:D8: 4D:11:EA:BB:12:36:26:41:A0:1D:27:F5:2A:6A:43:AA: 74:8D:1E:06:51:77:AA:CA 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 17 00:04:51.309 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:DA:20:8F:14:3E:A4:3E:77:58:DC:B5: 1E:66:36:0F:47:90:C4:4A:16:CF:B4:75:EA:70:DB:82: BA:8D:EA:0E:D3:02:20:72:A3:18:57:0D:05:15:3E:FB: 4E:51:3E:34:DF:61:6E:B5:E7:75:65:96:7C:C9:F8:80: 2D:FA:5B:2C:47:DB:56 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 17 00:04:51.370 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:6F:0B:AA:0B:52:6C:35:27:3E:B2:AB:F7: 67:7D:B4:51:B8:B0:31:68:D9:31:42:B7:97:0A:30:A8: E2:3B:0E:8B:02:21:00:F5:21:50:03:11:B1:62:91:F4: CF:C4:45:95:87:97:1E:77:2A:1D:00:81:9B:E1:9B:D5: 2C:AC:A8:A8:65:E9:6E
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-09-22T05:15:32+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Amazon CN=Amazon RSA 2048 M04
Issuer
C=US O=Amazon CN=Amazon Root CA 1
Valid from
2022-08-23T22:26:35+00:00
Expires
2030-08-23T22:26:35+00:00
Days remaining
1431
Serial (hex)
0773124F2A952E3ED18A58BDB85D1BC0CE5F27
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:8B:DF:6E:23:AC:97:1E:B4:E6:26:B2:79:DD:6A:26:F0:57:51:0F:1D:E3:94:29:3A:5E:EA:28:60:DE:01:9B
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
subjectKeyIdentifier
1F:52:92:61:56:82:54:7F:81:66:D8:1D:3D:0A:AA:32:5C:87:DD:08
authorityKeyIdentifier
84:18:CC:85:34:EC:BC:0C:94:94:2E:08:59:9C:C7:B2:10:4E:0A:08
authorityInfoAccess
OCSP - URI:http://ocsp.rootca1.amazontrust.com CA Issuers - URI:http://crt.rootca1.amazontrust.com/rootca1.cer
crlDistributionPoints
Full Name: URI:http://crl.rootca1.amazontrust.com/rootca1.crl
certificatePolicies
Policy: 2.23.140.1.2.1
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=Amazon CN=Amazon Root CA 1
Issuer
C=US ST=Arizona L=Scottsdale O=Starfield Technologies, Inc. CN=Starfield Services Root Certificate Authority - G2
Valid from
2015-05-25T12:00:00+00:00
Expires
2037-12-31T01:00:00+00:00
Days remaining
4117
Serial (hex)
067F944A2A27CDF3FAC2AE2B01F908EEB9C4C6
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

87:DC:D4:DC:74:64:0A:32:2C:D2:05:55:25:06:D1:BE:64:F1:25:96:25:80:96:54:49:86:B4:85:0B:C7:27:06
Certificate extensions & PEM
basicConstraints
CA:TRUE
keyUsage
Digital Signature, Certificate Sign, CRL Sign
subjectKeyIdentifier
84:18:CC:85:34:EC:BC:0C:94:94:2E:08:59:9C:C7:B2:10:4E:0A:08
authorityKeyIdentifier
9C:5F:00:DF:AA:01:D7:30:2B:38:88:A2:B8:6D:4A:9C:F2:11:91:83
authorityInfoAccess
OCSP - URI:http://ocsp.rootg2.amazontrust.com CA Issuers - URI:http://crt.rootg2.amazontrust.com/rootg2.cer
crlDistributionPoints
Full Name: URI:http://crl.rootg2.amazontrust.com/rootg2.crl
certificatePolicies
Policy: X509v3 Any Policy
-----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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