SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zap-lab.tw
SSL/TLS Certificate
SSL/TLS Certificate for zap-lab.tw
Expiring soon- Issued by (CA)
- Sectigo Limited
- Subject
- zap-lab.tw
- Valid from
- Nov 10, 2025
- Valid until
- Nov 10, 2026 (9 days remaining)
- Public key
- RSA 2048-bit
- Serial
- B52BCAF2698B08FB00AB814667780BE7
- SHA-256 fingerprint
- 11:4D:19:80:B7:A5:61:78:E6:C3:0C:97:9E:5C:46:DB:AB:3B:23:42:D6:98:DE:93:71:72:9A:F0:51:F8:11:31
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by zap-lab.tw's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch zap-lab.tw 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.