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Results for

openai.com

TLS certificate

The certificate is trusted and in date.

Valid86 days left

Certificate

Issuer
YE1 (Let's Encrypt)
Subject
openai.com

Validity

Valid from
May 28, 2026
Valid to
Aug 26, 2026

Connection

Protocol
TLSv1.3
Key
ECDSA prime256v1
Cipher
TLS_AES_256_GCM_SHA384 (TLSv1.3)

Subject alternative names (2)

  • *.email.openai.com
  • openai.com

Chain

  1. 01

    openai.com

    issued by YE1 (Let's Encrypt)

  2. 02

    YE1 (Let's Encrypt)

    issued by Root YE (ISRG)

  3. 03

    Root YE (ISRG)

    issued by ISRG Root X2 (Internet Security Research Group)

  4. 04

    ISRG Root X2 (Internet Security Research Group)

    issued by ISRG Root X1 (Internet Security Research Group)

  5. 05

    ISRG Root X1 (Internet Security Research Group)

    root

Fingerprint

SHA-256
98:73:6B:F6:68:54:EB:3C:34:03:17:8D:65:57:69:B5:E4:E0:10:E7:61:3D:0E:F4:0B:5E:F2:9A:A0:F2:77:BF
Serial number
05755338FD0104B8562ED4021335AA604C2E