SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
so-ma.co.jp
SSL/TLS Certificate
SSL/TLS Certificate for so-ma.co.jp
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- www.so-ma.co.jp
- Valid from
- Aug 31, 2026
- Valid until
- Nov 29, 2026 (80 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 06822F17DE791377BD1096689B2C2C2B03DD
- SHA-256 fingerprint
- 69:21:32:F6:DA:3E:E0:00:38:55:EB:2B:95:4E:18:C5:FF:D6:A0:16:70:7F:B3:6A:8C:1B:4A:99:D7:77:5D:91
- 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 so-ma.co.jp's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch so-ma.co.jp 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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