SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
favorite-color.com
SSL/TLS Certificate
SSL/TLS Certificate for favorite-color.com
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- *.favorite-color.com
- Valid from
- Nov 15, 2025
- Valid until
- Nov 29, 2026 (69 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 5B65BE4D11F2B1D93F9A7E03BDBC06F7
- SHA-256 fingerprint
- 95:C0:16:7A:1F:1C:93:F9:DF:37:88:6C:D5:3E:48:10:A9:13:27:1F:71:53:71:8E:F1:5F:E7:62:AC:24:62:40
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
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 21, 2026.
Never get surprised by favorite-color.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch favorite-color.com 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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