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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

TLSv1.3

cpp.edu · 3.33.238.99:443

Verified

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

Subject
CN=cpp.edu
Issuer
C=US O=Amazon CN=Amazon RSA 2048 M04
Valid from
2026-08-27T00:00:00+00:00
Expires
2027-03-12T23:59:59+00:00
Days remaining
135
Serial (hex)
0933EF63BE95A64CA6AE22B0BFB85A19
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:cpp.edu

SHA-256 fingerprint

01:1B:64:16:6D:50:74:41:9B:41:37:10:76:8F:E9:69:11:35:85:89:CA:34:3B:89:6C:B5:08:31:9F:03:A9:AB
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
41:A6:83:CF:69:B6:0D:A9:14:A9:AB:05:8F:18:83:9A:E1:5C:81:66
subjectAltName
DNS:cpp.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 : Aug 27 00:55:36.937 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:3D:B8:54:FC:AA:02:B3:C8:BB:90:1C:67: 0E:93:46:AD:BB:8A:89:23:4E:10:4E:03:FB:86:C7:EA: EC:97:EB:08:02:21:00:F6:01:48:3D:78:46:69:AC:13: D3:D2:89:76:F4:BB:C0:FD:03:00:94:27:C1:E3:48:AA: 74:B6:70:67:E7:CD:99 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 : Aug 27 00:55:36.978 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:14:88:B2:98:D3:60:8B:DB:09:A0:D0:FB: 38:2B:42:5C:EE:23:13:F4:52:4F:E5:F7:C5:37:26:02: D2:05:94:8C:02:21:00:FD:D9:82:52:00:73:B1:E4:05: 2E:FC:EA:85:35:3E:1E:BE:36:4B:AE:B2:DC:72:B4:BA: 12:6F:B3:E9:05:44:6D 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 : Aug 27 00:55:37.162 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:BB:8B:01:36:2D:05:64:7D:63:58:7F: B9:CE:26:57:7A:82:40:79:29:1A:7A:CD:6B:79:9D:5E: D4:CA:5C:C9:1E:02:20:11:F8:95:A2:F4:C9:FA:64:DB: E9:8A:C1:6C:04:82:93:74:BD:38:4D:D1:27:1E:C0:A1: 69:78:B5:35:66:6D:5F
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-28T19:32:13+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
1395
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
4081
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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