SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
up-time.net
SSL/TLS Certificate
SSL/TLS Certificate for up-time.net
Untrusted chain- Issued by (CA)
- Let's Encrypt
- Subject
- up-time.net
- Valid from
- Aug 11, 2026
- Valid until
- Nov 9, 2026 (53 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06B8DDFDF5414E18ACF00C37E4F9DCBE2F16
- SHA-256 fingerprint
- 03:B2:89:CA:C5:D5:35:21:50:34:67:A9:44:6A:A6:C0:C2:69:7F:C9:8D:C5:73:43:07:BB:47:56:14:FF:32:94
- Chain
- —
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by up-time.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch up-time.net 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, DNSSEC, CNAME 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.