SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
shigin.college
SSL/TLS Certificate
SSL/TLS Certificate for shigin.college
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- shigin.college
- Valid from
- Oct 13, 2026
- Valid until
- Jan 11, 2027 (71 days remaining)
- Public key
- EC 256-bit
- Serial
- 06B36736F143D242610455F4369519A129A2
- SHA-256 fingerprint
- 4D:72:D6:12:38:D9:D7:ED:05:47:21:BF:F5:FF:A5:AB:B9:46:6A:86:B5:34:26:B3:96:78:BE:B8:9B:3E:6C:EC
- Chain
- YE2 → Root YE → ISRG Root X2 → ISRG Root X1
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 Oct 23, 2026.
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This is today's certificate. Turn on monitoring and we'll watch shigin.college 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, CNAME, TXT 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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