SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
pl-open.science
SSL/TLS Certificate
SSL/TLS Certificate for pl-open.science
Valid- Issued by (CA)
- Amazon
- Subject
- pl-open.science
- Valid from
- Jun 15, 2026
- Valid until
- Dec 29, 2026 (112 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 08FFD76E4020826B651F3F2285CAF09E
- SHA-256 fingerprint
- BF:94:6F:E9:5B:A1:17:E4:39:FF:B6:99:89:06:CE:CA:D8:32:CE:9E:13:67:CA:39:91:92:FE:5F:5B:A7:03:1F
- Chain
- Amazon RSA 2048 M04 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
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 Sep 2, 2026.
Never get surprised by pl-open.science's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch pl-open.science 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.