SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ptk-52.ru
SSL/TLS Certificate
SSL/TLS Certificate for ptk-52.ru
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- ptk-52.ru
- Valid from
- Jul 8, 2026
- Valid until
- Oct 6, 2026 (69 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 050DDC52673B845E47A83A6D7A9583386630
- SHA-256 fingerprint
- 53:0D:9B:4C:57:36:EC:08:71:22:10:CC:5F:03:13:9D:10:0D:8C:0A:15:A3:A4:8B:32:CC:D5:A3:B1:70:F1:A2
- Chain
- YR1 → Root YR → 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 ptk-52.ru's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ptk-52.ru 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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