SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ost-tek.no
SSL/TLS Certificate
SSL/TLS Certificate for ost-tek.no
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ost-tek.no
- Valid from
- Sep 5, 2026
- Valid until
- Dec 4, 2026 (88 days remaining)
- Public key
- EC 256-bit
- Serial
- 05353D7D699521CA1D93A9112E8349E47D45
- SHA-256 fingerprint
- EB:AE:7B:20:30:86:31:92:AD:89:AE:BC:9A:81:71:7B:86:B9:60:13:7F:51:AE:99:76:E6:A9:B8:87:FB:5B:F1
- Chain
- YE1 → 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.
Never get surprised by ost-tek.no's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ost-tek.no 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.