SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
tns-school.com
SSL/TLS Certificate
SSL/TLS Certificate for tns-school.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- tns-school.com
- Valid from
- Oct 30, 2026
- Valid until
- Jan 28, 2027 (86 days remaining)
- Public key
- EC 256-bit
- Serial
- 05995032413CA254E925B7C28FE963448164
- SHA-256 fingerprint
- C2:16:66:C7:13:D9:4D:9D:4A:D4:47:46:13:04:59:71:2A:B9:E2:F6:A8:F3:60:AD:66:B5:E0:BE:9D:44:48:E0
- 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.
Never get surprised by tns-school.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch tns-school.com 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.