Certificate Summary:

Subject: openai.com
Issuer: E8
Expiration: 2025-12-26 02:18:34 UTC
Key Identifier: 81:94:E3:5A:66:B3:FE:C9:83:A5:76:75:71:3A:34:93:C7:C5:F6:D7

Download and Install

Received at FYIcenter.com on: 2025-11-13

Certificate Detailed Information:

Name:
/CN=openai.com

Subject: 
   Common Name (CN): openai.com
   Organizational Unit Name (OU): 
   Organization Name (O): 
   Locality Name (L): 
   State or Province Name (ST): 
   Country Name (C): 
   Email Address: 
Issuer: 
   Common Name (CN): E8
   Organizational Unit Name (OU): 
   Organization Name (O): Let's Encrypt
   Locality Name (L): 
   State or Province Name (ST): 
   Country Name (C): US
   Email Address: 
Valid From: Sat, 27 Sep 2025 02:18:35 +0000 
Valid To: Fri, 26 Dec 2025 02:18:34 +0000 
Serial Number: 0x05897F1D09B47431C7D77A56CCA3E0713E28 
Hash: 54cfab05 
Version: 2 
Signature Type: ecdsa-with-SHA384 
Purposes:  
   SSL client 
   SSL server 
   Netscape SSL server 
   S/MIME signing 
   S/MIME encryption 
   CRL signing 
   Any Purpose 
   OCSP helper 
   Time Stamp signing 
Extensions:  
   keyUsage:
      Digital Signature 
   extendedKeyUsage:
      TLS Web Server Authentication, TLS Web Client Authentication 
   basicConstraints:
      CA:FALSE 
   subjectKeyIdentifier:
      81:94:E3:5A:66:B3:FE:C9:83:A5:76:75:71:3A:34:93:C7:C5:F6:D7 
   authorityKeyIdentifier:
      keyid:8F:0D:13:A2:F6:2E:7E:D1:50:6C:33:18:38:5D:59:8E:23:72:91:CA
 
   authorityInfoAccess:
      CA Issuers - URI:http://e8.i.lencr.org/
 
   subjectAltName:
      DNS:*.openai.com, DNS:openai.com 
   certificatePolicies:
      Policy: 2.23.140.1.2.1
 
   crlDistributionPoints:
      
Full Name:
  URI:http://e8.c.lencr.org/41.crl
 
   ct_precert_scts:
      Signed Certificate Timestamp:
    Version   : v1 (0x0)
    Log ID    : ED:3C:4B:D6:E8:06:C2:A4:A2:00:57:DB:CB:24:E2:38:
                01:DF:51:2F:ED:C4:86:C5:70:0F:20:DD:B7:3E:3F:E0
    Timestamp : Sep 27 03:17:06.075 2025 GMT
    Extensions: none
    Signature : ecdsa-with-SHA256
                30:46:02:21:00:96:71:0A:75:32:6B:2F:C4:02:D3:48:
                45:E5:BB:1C:06:60:3C:13:42:6F:4B:43:25:0C:72:B1:
                AF:CE:1B:7F:88:02:21:00:F2:2D:75:2D:A1:F1:25:A1:
                96:D3:54:7E:EC:26:71:E8:87:12:ED:78:55:47:E1:62:
                42:4E:8A:CE:64:B5:3E:B9
Signed Certificate Timestamp:
    Version   : v1 (0x0)
    Log ID    : DD:DC:CA:34:95:D7:E1:16:05:E7:95:32:FA:C7:9F:F8:
                3D:1C:50:DF:DB:00:3A:14:12:76:0A:2C:AC:BB:C8:2A
    Timestamp : Sep 27 03:17:08.138 2025 GMT
    Extensions: none
    Signature : ecdsa-with-SHA256
                30:44:02:20:4F:DB:9A:6F:56:E3:DF:6E:9E:65:77:BB:
                5E:93:C5:64:3A:49:41:D7:31:92:CA:17:1B:F4:BA:97:
                C9:1F:52:E8:02:20:2D:7D:F3:D8:09:C2:43:36:31:91:
                06:CF:FB:16:D8:5B:F3:EB:2C:C9:C4:68:99:AC:37:98:
                CD:73:77:7F:1C:CB 

Certificate in PEM Format:

-----BEGIN CERTIFICATE-----
MIIDjzCCAxWgAwIBAgISBYl/HQm0dDHH13pWzKPgcT4oMAoGCCqGSM49BAMDMDIx
CzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQDEwJF
ODAeFw0yNTA5MjcwMjE4MzVaFw0yNTEyMjYwMjE4MzRaMBUxEzARBgNVBAMTCm9w
ZW5haS5jb20wWTATBgcqhkjOPQIBBggqhkjOPQMBBwNCAASlXsKMUM9Oy4Ud6jcx
zIUtk+uxG9msAiU9VQ33il7z8sGncM0TWK7by9yiYDDlblI4D3f1PoZtmq9FTQh6
u6Dho4ICJjCCAiIwDgYDVR0PAQH/BAQDAgeAMB0GA1UdJQQWMBQGCCsGAQUFBwMB
BggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBSBlONaZrP+yYOldnVx
OjSTx8X21zAfBgNVHSMEGDAWgBSPDROi9i5+0VBsMxg4XVmOI3KRyjAyBggrBgEF
BQcBAQQmMCQwIgYIKwYBBQUHMAKGFmh0dHA6Ly9lOC5pLmxlbmNyLm9yZy8wIwYD
VR0RBBwwGoIMKi5vcGVuYWkuY29tggpvcGVuYWkuY29tMBMGA1UdIAQMMAowCAYG
Z4EMAQIBMC0GA1UdHwQmMCQwIqAgoB6GHGh0dHA6Ly9lOC5jLmxlbmNyLm9yZy80
MS5jcmwwggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAAdwDtPEvW6AbCpKIAV9vLJOI4
Ad9RL+3EhsVwDyDdtz4/4AAAAZmJLJubAAAEAwBIMEYCIQCWcQp1MmsvxALTSEXl
uxwGYDwTQm9LQyUMcrGvzht/iAIhAPItdS2h8SWhltNUfuwmceiHEu14VUfhYkJO
is5ktT65AHUA3dzKNJXX4RYF55Uy+sef+D0cUN/bADoUEnYKLKy7yCoAAAGZiSyj
qgAABAMARjBEAiBP25pvVuPfbp5ld7tek8VkOklB1zGSyhcb9LqXyR9S6AIgLX3z
2AnCQzYxkQbP+xbYW/PrLMnEaJmsN5jNc3d/HMswCgYIKoZIzj0EAwMDaAAwZQIw
C4r7dg4hgQMMVG8CUyq4kbSGtXHwmVc40tLFWnbtRY4LEdvQuSU/44kHRYywUe7T
AjEAgqtznWkkFlCtd3PJjQ09ka/yXlno2JNAdUQTrDj50j49Wu1wyA0SsVE6+aSQ
ZW+T
-----END CERTIFICATE-----

Related Certificate(s):

ID      Subject          Issuer           Expiration Key Identifier   Relation   
        openai.com       E8               2025-12-26 8194E35A66B3FEC… This Cert
        --------------------------------------------------
32196   E8               ISRG Root X1     2027-03-12 8F0D13A2F62E7ED… Parent Cert
15612   openai.com       GeoTrust Global… 2023-08-22 39AE0C1FB10D256… Same Subject

Public Key Detailed Information:

Key Details:
   Type: EC
   Size (bits): 256
   Curve Name: 
prime256v1
   Curve OID: 
1.2.840.10045.3.1.7
   Public key (x): 
a55ec28c50cf4ecb851dea3731cc852d93ebb11bd9ac02253d550df78a5ef3f2
   Public key (y): 
c1a770cd1358aedbcbdca26030e56e52380f77f53e866d9aaf454d087abba0e1

Public Key in PEM Format:

-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEpV7CjFDPTsuFHeo3McyFLZPrsRvZ
rAIlPVUN94pe8/LBp3DNE1iu28vcomAw5W5SOA939T6GbZqvRU0Ierug4Q==
-----END PUBLIC KEY-----

Identical or Similar Keys: We found that the public key in this certificate matches key(s) recorded previously.

ID      Type Size Pri/Pub Key Identifier   Date       Comparison 
32247   EC   256  Public  8194E35A66B3FEC… 2025-11-13 Same Key ID