SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sg-portal.online
SSL/TLS Certificate
SSL/TLS Certificate for sg-portal.online
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- sg-portal.online
- Valid from
- Nov 2, 2026
- Valid until
- Jan 31, 2027 (78 days remaining)
- Public key
- EC 256-bit
- Serial
- 066B5D3D84C5DABF90E78B78B630E1EFA164
- SHA-256 fingerprint
- 1E:12:5A:42:B5:81:7E:D9:2D:8C:E8:C0:68:BC:83:91:D9:8D:06:A2:E8:B5:50:AA:5F:6F:45:7E:78:A0:8A:D0
- Chain
- YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Nov 14, 2026.
Never get surprised by sg-portal.online's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch sg-portal.online continuously, notifying you the moment anything moves across all three signals:

Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, CNAME, TXT and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
Free for your first domain: uptime, DNS, and certificate together. No credit card.