SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
dns-up.com
SSL/TLS Certificate
SSL/TLS Certificate for dns-up.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- dns-up.com
- Valid from
- Aug 7, 2026
- Valid until
- Nov 5, 2026 (80 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0579036261507527C257547AC63C6BA69FC4
- SHA-256 fingerprint
- E2:63:0F:E4:3B:51:AA:36:53:8E:A3:6E:C8:16:19:DA:B0:86:B8:1A:ED:A5:88:FF:BC:FF:54:F3:D3:6C:AE:A0
- 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 dns-up.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch dns-up.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.