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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

osu.edu · 75.2.76.225:443

Verified

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

Subject
CN=*.osu.edu
Issuer
C=US O=Amazon CN=Amazon RSA 2048 M04
Valid from
2026-07-01T00:00:00+00:00
Expires
2027-01-14T23:59:59+00:00
Days remaining
101
Serial (hex)
039B2F40B3767035445C38173FAAD70A
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.osu.edu, DNS:osu.edu, DNS:www1.web.osu.edu, DNS:www2.web.osu.edu

SHA-256 fingerprint

72:CA:81:01:D9:56:84:3C:98:72:05:1E:23:61:C2:49:6D:13:18:35:9A:2B:D0:BF:E4:7F:42:69:12:4E:7E:B8
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
97:72:FF:28:24:B9:8B:A2:66:9B:0D:1D:F1:A9:78:CB:88:1A:13:3A
subjectAltName
DNS:*.osu.edu, DNS:osu.edu, DNS:www1.web.osu.edu, DNS:www2.web.osu.edu
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 : Jul 1 00:08:15.050 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:31:1C:A1:20:FD:D2:8F:2B:BC:18:1C:9A: D4:E5:1E:A5:F5:B7:B5:68:B6:47:FE:12:DC:12:39:31: 2F:3C:5F:56:02:21:00:AC:66:94:98:6A:BE:1D:F8:43: 24:DD:58:F1:47:DF:24:E0:84:A6:A4:3F:A4:F2:4B:85: BE:A6:04:8C:F6:04:1B 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 : Jul 1 00:08:15.032 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:16:4A:C7:A8:2B:52:E3:E5:22:3A:D8:4E: 4D:9D:37:81:C0:D9:F1:80:CA:D4:E1:86:94:CD:FB:9C: C8:22:0A:3A:02:20:13:97:43:AE:6F:7F:AA:D6:3E:A2: 42:13:83:42:DE:0C:3C:91:69:BD:C4:A5:63:F8:5E:C3: 4C:9A:3C:A5:FB:FB 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 : Jul 1 00:08:15.093 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:C1:60:81:65:A0:59:F8:AB:D9:97:C7: E7:12:C7:A7:04:14:30:22:6E:CB:9A:87:34:62:DF:97: 67:2A:EF:8A:4E:02:20:13:15:4E:24:A8:03:CC:5E:04: 65:47:56:0E:2C:D9:6C:70:D2:74:28:A0:6C:AF:72:68: B6:C1:31:37:03:89:0A
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-05T03:41:19+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
1418
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
4104
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.

View certificate JSON

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