SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for a-k.tech
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- a-k.tech
- Valid from
- Sep 19, 2026
- Valid until
- Dec 18, 2026 (33 days remaining)
- Public key
- EC 256-bit
- Serial
- 059C400AFDA2895343AF205CC112B0515D38
- SHA-256 fingerprint
- A6:4D:FE:23:38:BA:10:D8:90:66:F5:9A:8D:7F:50:40:8A:96:1B:C9:41:4E:C3:1A:A8:08:9F:7C:67:77:B6:1E
- 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.
This certificate has been served since Oct 20, 2026.
Never get surprised by a-k.tech's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch a-k.tech 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.