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CertLook

Check your website's SSL certificate and chain

CSR Decoder

SSL Certificate Report

SSL Status Valid
Chain Status Valid
Certificate Authority Sectigo Limited
Organization Sectigo Limited
Common Name github.com
SAN Domains
github.com
www.github.com
Hostname github.com
IP Address 140.82.121.4
Port 443
Start Date 2026-07-03 00:00:00
End Date 2026-09-30 23:59:59
Days Remaining 50
Algorithm ecdsa-with-SHA256
Fingerprint 17F8FD2E3FD2C113FCB9772D8A4BABB8522DD06DD0794915A4FF98B1B6863A00
Performance 80.66 ms
Supported Protocols TLS 1.2
Name Servers
ns-421.awsdns-52.com
ns-520.awsdns-01.net
dns1.p08.nsone.net
dns2.p08.nsone.net
dns3.p08.nsone.net
dns4.p08.nsone.net
ns-1283.awsdns-32.org
ns-1707.awsdns-21.co.uk
SSL Compatibility A (90%)
Mobile Support 3/3 Supported
Browser Support 4/4 Supported
Perfect Forward Secrecy Yes
HSTS Enabled Yes
Certificate Transparency Yes
Cipher Suites
ECDHE-RSA-AES256-GCM-SHA384
ECDHE-RSA-AES128-GCM-SHA256
ECDHE-RSA-CHACHA20-POLY1305

Certificate Chain

Chain Length: 3 certificates

github.com
Certificate Authority: Sectigo Public Server Authentication CA DV E36
Valid: Yes (2026-09-30 23:59:59)
leaf
Sectigo Public Server Authentication CA DV E36
Certificate Authority: Sectigo Public Server Authentication Root E46
Valid: Yes (2036-03-21 23:59:59)
intermediate
Sectigo Public Server Authentication Root E46
Certificate Authority: USERTrust ECC Certification Authority
Valid: Yes (2038-01-18 23:59:59)
intermediate

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