SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
lanark.app
SSL/TLS Certificate
SSL/TLS Certificate for lanark.app
Expired- Issued by (CA)
- Sectigo Limited
- Subject
- lanark.app
- Valid from
- Mar 12, 2021
- Valid until
- Mar 12, 2022 (expired 1698 days ago)
- Public key
- RSA 2048-bit
- Serial
- 40DF486A094072EAB61D2918F55AC2C7
- SHA-256 fingerprint
- 61:8E:3E:8A:B7:D3:74:44:EE:A9:EE:6E:91:D8:47:14:52:3A:18:C1:E9:BF:77:19:8B:E8:64:F2:E6:A9:35:DB
- Chain
- Sectigo RSA Domain Validation Secure Server CA → USERTrust RSA Certification Authority
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, 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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