SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
open-theweb.net
SSL/TLS Certificate
SSL/TLS Certificate for open-theweb.net
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.open-theweb.net
- Valid from
- Sep 10, 2026
- Valid until
- Dec 9, 2026 (82 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06BB2E96E03F7E97B118E46C5CBF410E20BE
- SHA-256 fingerprint
- 4A:1B:17:C8:E9:D9:6B:7F:1D:08:7B:D8:DB:18:B9:4B:50:70:E9:29:32:EF:45:17:1B:E3:91:3C:39:D2:50:32
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 14, 2026.
Never get surprised by open-theweb.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch open-theweb.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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