SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
masuda-ent.net
SSL/TLS Certificate
SSL/TLS Certificate for masuda-ent.net
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- masuda-ent.net
- Valid from
- Oct 7, 2026
- Valid until
- Jan 5, 2027 (84 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 058EC2EA8684BB33299ECE173F31AABBF827
- SHA-256 fingerprint
- 86:5E:97:23:64:C2:BF:59:06:EC:83:1F:84:B0:E5:66:6E:AF:CE:D1:F3:62:77:52:D4:66:AC:BD:E2:FD:09:26
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
We've observed 2 previous certificates for this host. This certificate has been served since Oct 10, 2026.
Never get surprised by masuda-ent.net's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch masuda-ent.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.