Validexpires in 56d
Certificate
Issuer (CA)Sectigo Public Server Authentication CA DV R36↗Sectigo Limited⌕ reverse certs from this CA →
Subject (CN)mailing.github.com
ValidityAug 4 00:00:00 2026 GMT→Nov 1 23:59:59 2026 GMT· 56 d left
ValidationDV
SerialFEDF0887EF6EB1663F868C98B4DA0D5C
KeyRSA · 2048-bit
SignatureSHA-256 with RSA
Fingerprint (SHA-256)d50023263d8cd69329ee6aea4b34acb0396c8a6b6a21e747580098d30f0cf96a
SAN domains — covered by this certificate
mailing.github.com↗⌕ reverse by SAN →
Certificate Transparency (crt.sh)
Certificate Transparency logs unavailable right now (crt.sh).
Security (TLS)
ProtocolTLSv1.3
CipherTLS_AES_128_GCM_SHA256
HTTP protocolsHTTP/1.1HTTP/2HTTP/3
HSTSnot setno Strict-Transport-Security header
Chain
leafmailing.github.com← Sectigo Public Server Authentication CA DV R36
intermediateSectigo Public Server Authentication CA DV R36← Sectigo Public Server Authentication Root R46
intermediateSectigo Public Server Authentication Root R46← USERTrust RSA Certification Authority
rootUSERTrust RSA Certification Authority
Same certificate — neighbour domains
No other domains share this certificate in our graph yet — this grows as domains are scanned.
host: mailing.github.comcollected just now↻ Refresh