SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
comforttech-ca.com
SSL/TLS Certificate
SSL/TLS Certificate for comforttech-ca.com
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- comforttech.ca
- Valid from
- May 17, 2026
- Valid until
- Aug 15, 2026 (expired 16 days ago)
- Public key
- RSA 2048-bit
- Serial
- 058007EAD62300AD18B5EBF568DD2874E5D5
- SHA-256 fingerprint
- A3:0E:A2:D5:93:99:E5:55:3E:A9:CF:5E:B1:CF:96:BB:EA:72:B8:19:A4:DE:8E:BF:00:AA:16:69:64:8D:D3:34
- Chain
- R12 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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Uptime
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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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