SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for 2-1.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 2-1.com
- Valid from
- Jul 6, 2026
- Valid until
- Oct 4, 2026 (71 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05A940B3DECA984E66F950A908727234ABCE
- SHA-256 fingerprint
- CD:6D:B7:1F:6C:19:59:27:7B:5C:95:2E:7A:60:69:6D:52:06:A5:9F:5A:D0:52:21:4D:4C:1D:E6:D0:8F:7D:65
- 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 2-1.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch 2-1.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.