SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
pk-tech.net
SSL/TLS Certificate
SSL/TLS Certificate for pk-tech.net
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- kasei.se
- Valid from
- Jun 7, 2026
- Valid until
- Sep 5, 2026 (41 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05776C3F47569079641BA39288185E9185F0
- SHA-256 fingerprint
- D5:F6:11:87:34:E2:63:52:CA:03:CF:B4:8E:88:9C:7E:2D:6C:D7:5D:E0:F9:2B:40:77:F1:F0:88:79:79:82:DC
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
Never get surprised by pk-tech.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch pk-tech.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.
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